JP2783992B2 - Information transmission / reception method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission / reception method that can be used in systems such as communication, navigation, and remote control, and that uses a wide-range ultra-high frequency signal (hereinafter abbreviated as UHF) as a signal carrier for information. .

[0002]

2. Description of the Related Art In transmitting information, it is essential to establish a communication channel that can withstand changes in the propagation conditions of a signal to be transmitted and interference from various sources. .

[0003] The communication channel has a sufficient pass band and bit rate and does not interfere with other radio technology systems (hereinafter referred to as RTS). Must be a communication channel that does not have access to the facts of information transmission and that the transmitted information is not retrieved.

[0004] Various methods are used to obtain the above properties. When using numerical methods in information transmission, the information is coded. In this way, in some cases, not only can you detect missing parts of the received information, but you can also eliminate them (for example, Shuvalov VP, "Systems of Electroco
mmunication, "Radio Issuer (Radio and Communication)", Moscow, 1987).

[0005]

However, such a method is not sufficiently stable against disturbances or changes in propagation conditions, and requires a complicated device, so that the performance of the method is low. There are problems in principle, technically, and economically in making a good practical receiver.

[0006] Further, in such a system, the problem of confidentiality cannot be solved, at least the fact that information is transmitted is known, and in other RTSs, in the frequency band of the signal transmitted, There is a sufficiently high level of interference created by these channels.

To increase the protection against interference, information transmission is compounded by a large compression factor K (K = bandwidth of the received signal / bandwidth of the transmitted signal) obtained by extending the spectrum of the carrier. UHF signal must be used. That is, a signal generated based on a wideband support signal must be used.

This support signal is also used for the coincidence / cross-correlation processing of the received signal at the receiving base.
(See, for example, L.Ye. Varakin, “System I Svyazis Shmopodovnyimi Signalami (a communication system based on signals imitating noise)”, Moscow, “Radio
(See Isvij (Radio and Communications), 1885).

At this time, if the spectral density of this signal is reduced, the interference with other RTSs may be reduced. However, this involves partially or completely switching the spectrum of the transmitted signal and changing the RTS portion. It is necessary to switch the target range, and the range that may be accessed by unauthorized persons is switched.

[0010] However, if the compression coefficient K is increased to a certain level or more, the wide range of the information carrier signal to be used is limited due to an increase in technical difficulties.

[0011] At present, there are still some directions which increase the compression factor K somewhat, in connection with matching processes, for example the multi-channel method, and in fact the compression factor K Although the value can be increased slightly, there are still technical difficulties.

In addition, for example, in wireless positioning, technical simplification is substantially performed, but there is still a problem that energy consumption is increased as a whole. This direction is associated with a shift in the way the received information is processed. That is, a transition from a cross-correlation process in which the input signal is compared to a complex outgoing signal reference that is somehow present in the receiver, to an autocorrelation process in which only the received signal is used.

Such a method can be adopted, for example, when two signals that are temporally and generationally displaced are received at the same time, for example, when a zomb signal is reflected from an object.

In this case, the correlation-related processing can be automatically performed by sequentially executing the received signal and the signal amplified and filtered in the following three steps.

T corresponding to the difference between the input times of the two signals
The received signal is held (delayed) by the value of r, and this signal is multiplied by the non-delayed signal, and integrated at an interval of Ts corresponding to the length of the signal (for example, “Radio cutlet ion by VM Svistov”). Radio localized signals and their processin
g) "Moscow, Sof Radio, 1977, p. 196, see FIGS.

When a single signal is received for autocorrelation processing (when Tr = 0), a secondary type detection is performed in place of the first two steps (see p. 197, ibid.).
(Figs. 4 and 13).

There is also a communication system for transmitting information on a support signal at the same time as transmitting effective information, and is used in a transmitting station to expand the spectrum of a transmitted signal.

Based on this information, the receiving station performs an autocorrelation process. For example, to achieve this, US Pat. No. 3,638,121, Jan. 25, 1972 (filed on Dec. 20, 1960), JJ Spilker, Jr.,
"Nonperiodic energy communication system capable
The device disclosed in "of operating at low signal-to-noise ratios" is used.

A major drawback of using the autocorrelation process is that the support signal consumes much more energy than the matching process that does not include noise components. In this case, the effects of self-specific noise and external disturbances are magnified. For this reason, when the ratio of the strength of the input signal to the strength of the noise becomes small and becomes much smaller than 1, the ratio of the output signal / noise becomes almost quadratic.

In particular, a method using secondary format detection,
Alternatively, using two temporally shifted signals, Tr
Is smaller than 1 / fp (where fp is the spectral width of external disturbance), the protection against disturbance is greatly degraded.

The communication device having the above-mentioned patent (a device for transmitting two signals at the same time, separating them at the receiving station, and realizing the auto-correlation process) is simply very complicated and has an increased compression coefficient K. Limits the possibility of

The latest prior art adopts a radio communication method for transmitting a carrier UHF which is modularized by effective transmission information (MV Nazarov et al. Theor
y oftransmission of signals. See Sbyash, Moscow, 1970, p. 113).

Information to be transmitted, such as sound, shaft rotation,
Generates one or more information signals using the voltage from the pickup output or a pulse from a computer, and modulates (encodes) the carrier using the information signals to be transmitted. Generate and send.

As a carrier, a combined UHF signal,
For example, linear frequency modulation, linear regression square matching of the maximum length used for correlation processing of UHF signals, and the like are used. In order to extract the information signal from the interference, the receiving station performs a matching process on the received signal, and in some cases, performs a correlation process with a support signal. As the support signal, a composite signal known in advance, which is employed when generating a carrier wave, is used.

A major drawback of such a method is that it limits the broadband of the carrier used. This limitation is mainly due to two factors. The first factor is
As with the analogs described above, increasing the compression factor K beyond a certain point increases technical difficulties.

However, apart from the technical difficulties,
Alternatively, a factor that causes a problem beyond technical difficulties is a limitation imposed when the carrier is used with a significantly widened spectrum width.

For example, when converting from a narrow band and a wide band to an ultra-wide band signal, the spectral width of the carrier signal may be equal to or even greater than the lowest frequency of the signal. As a result, the first transmission signal generated based on the carrier wave at the transmitting station, that is, the signal that reaches the coincidence processing at the channel receiving station is decorrelated.

This decorrelation is associated firstly with different frequency distortions of the carrier and then with the frequency distortion of the transmitted signal. This frequency distortion is caused by the non-linearity of the frequency and phase and the instability of the amplitude and frequency characteristics of the connection path between the transceiver used for wireless communication and the channel that propagates the transmission signal in the band.

In addition, in this case, various reflections may occur in the signal, which not only limits the number of signal propagation paths, adjustments at receiving stations, and information, but also various signals. The radio channels of various frequency components are changed, and as a result, their interference characteristics are different, and the signal is distorted.

In this case, if the conventional processing method of matching with the signal carrier at the starting point is adopted, remarkable energy consumption is caused, and even the transmission information may be distorted.

Thus, the method adopted in the state of the art restricts the possible compression factor and the broadband of the carrier, and thus the potential for increasing the interference protection of the radio channel, its confidentiality. This limits the stability and the like against various conditions during propagation.

The disturbing effects on other RTSs can be considerable. In particular, the communication system created by this method, which is not far from the channel transmitting station, is considerably complicated, and if the range of the compression coefficient K is slightly increased, it becomes extremely complicated and expensive. ,
In reality, it cannot be adopted.

The present invention has been made under such a background, and has a problem that the compression coefficient can be increased by several orders as compared with the latest conventional technology, and at the same time, a communication channel is realized. It is intended to provide a method of transmitting and receiving information which can be considerably simplified.

[0034]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, one or more information signals conveyed by parameters are to be transmitted. A first step of generating a carrier for transmitting the information signal, and a second step of generating a carrier for transmitting the information signal.
A third step of encoding the carrier with the information signal to generate a transmission signal having a support signal and a transmission information signal; and, upon reception, the transmission signal that has been subjected to a filtering process and an amplification process. A fourth process of separating the information signal by performing a correlation process with a support signal included in the transmission signal
(A) using, as the carrier, an ultra-wideband signal having a spectrum width equal to or greater than the lowest frequency of the spectrum, and (b) based on the carrier, Modulating it with the information signal and adding one or more parameters thereof to generate one or more transmission information signals and transmission support signals,
The difference between the transmission information signal and the transmission support signal,
In consideration of the spectrum width of the information signal, at least one of the parameters used for discrimination is set to be larger than an interval allowing a correlation process at the time of reception of the corresponding parameter, and the transmission information signal and the The mutual addition or amplification of the spectral components of the support signal is within the tolerance defined by the frequency spacing, i.e., from the moment of generation of the transmission signal to their correlation in reception, all of the spectrum of the transmission signal. (C) the transmission support signal and the information signal are set to a value that does not exceed a value that is larger than a range in which the linearity of the connection path between the transmitter and the receiver and the propagation channel is maintained with the required accuracy in the frequency range of (c). Generating the transmission signal, and (d) receiving the signal as a support signal for correlation processing. Utilizing also the received, pre-amplified and filtered transmission signal, the correlation processing and separation of each information signal is performed between the corresponding received transmission information signal and the received transmission support signal. And using the carrier wave transmitted and received in consideration of the difference between

According to a second aspect of the present invention, in the information transmitting / receiving method according to the first aspect, a continuous noise signal having a required spectrum width is used as the carrier.

According to a third aspect of the present invention, in the information transmitting / receiving method according to the second aspect, the amplitude of the carrier signal is further limited when the carrier signal is generated.

According to a fourth aspect of the present invention, in the information transmitting / receiving method according to any one of the first to third aspects,
The output of the transmission support signal is selected according to a mask condition for amplitude modulation of the transmission information signal in the transmission signal.

According to a fifth aspect of the present invention, in the information transmitting / receiving method according to any one of the first to fourth aspects,
In generating the transmission support signal or the transmission information signal, a delay is introduced, in which case the difference between the temporal arrangements of the two signals is defined by a value corresponding to the reciprocal of the spectrum width of the signal. The value is equal to or greater than the value, and upon reception, the received transmission signal is filtered and amplified in advance, and after introducing a corresponding delay, a reception information signal and the support signal are generated, and a correlation process is performed. These signals are multiplied, and the result of the multiplication is filtered at a center frequency and a frequency band matched with the information signal.

According to a sixth aspect of the present invention, in the information transmitting / receiving method according to any one of the first to fourth aspects,
In generating the information signal, the center frequency spectrum is selected from the viewpoint of obtaining a necessary difference between the transmission information signal and the transmission support signal, and the generation of the transmission information signal corresponds to the carrier. Multiplied by the information signal, the carrier is used as the transmission support signal, and upon reception, after filtering and amplifying the received transmission signal in advance, two signals, namely, the reception information signal And a reception support signal, and the signals are multiplied to correlate and separate the information signal. The multiplication result is filtered using a band-specific filter. Is set to the center frequency of the information signal, and has a band that matches the spectrum width.

According to a seventh aspect of the present invention, in the information transmitting / receiving method according to the sixth aspect, the generation of the transmission support signal or the transmission information signal includes a delay defined by a spectrum width of the carrier. And introduced
Upon reception, the compensation processing is performed before the correlation processing.

In this case, the separation between the transmitted information signal and the transmitted support signal must meet two requirements. When correlating and separating multiple simultaneously transmitted information signals to a certain extent to attenuate the effects of external and internal disturbances, this separation reduces the spectral width of the information signal, even with one of the parameters. Considering this, the interval for correlating the corresponding parameters must be increased.

However, this separation must be free of spectral and temporal changes in the signal. If there is a change, the intermixing, including temporal mixing, or the corresponding spectral component extension of the transmitted information signal and the support signal will be larger than a predetermined tolerance.

This range is defined by time intervals and frequency intervals, in which the required accuracy is retained from the instant at which the transmitted information and support signals are generated from the carrier and their correlation at the time of reception. Are the connection state of the transmitter / receiver of propagation up to and the stability and linearity of the channel frequency / phase characteristics, and the stability of the amplitude / frequency characteristics.

The above requirements must be satisfied at every frequency in the spectrum of the transmitted signal. If this condition is not satisfied, the correlation between the two transmission signals is lost, the amplitude is reduced, and the signal is distorted after the correlation processing. Thus, the difference in tolerance between the transmitted information signal and the support signal can be calculated analytically, but can also be measured in the present invention.

In the present invention, for technical simplicity and to eliminate the possibility of unauthorized reception,
A continuous noise signal can be used to keep secrets using the production rules and composite carrier parameters that are known or defined in the course of the work as the carrier.

Such a signal can be obtained from ordinary white noise. That is, it can be obtained by passing white noise through a band-specific filter that passes only a predetermined band.

To avoid decorrelation of the transmitted support and information signals, the connection of the transceiver must be linear. That is, the generated transmission support signal and information signal must not be limited in amplitude.

However, since normal noise has considerable protection, the condition that the amplitude should not be limited substantially reduces the average transmitted power. In order to avoid this, the purpose is to limit the amplitude to the point where the carrier wave becomes a disordered carrier wave (up to the generation of the transmission support signal and the information signal).

The correlation process can be performed in various ways, depending on the parameter (s) used to obtain the difference between the transmission support signal and the transmission information signal.

As a variable parameter, a time delay can be used. In this case, to generate the transmission support signal, the support signal carrier signal is delayed by time T, or the transmission information signal is delayed by the same T time.

That is, the time of the support signal carrier is delayed by a time that exceeds the allowable capacity of the T-raz generated carrier, that is, the capacity defined by the magnitude and reciprocal of the width of the signal spectrum.

When generating several transmitted information signals using information signals that are not allowed at the starting point, the delay introduced into each of these signals must be different in magnitude from one another. It must also exceed T-raz (the tolerance over time of the composite signal is defined by the reciprocal of the spectral width of the signal).

[0053] Upon receipt of the pre-filtered and amplified transmit signal, a corresponding signal and support signal pair is created by introducing a corresponding delay for each information signal. To perform the correlation processing, these signals are multiplied and filtered at a frequency and a band matched with the information signal.

Although the invention is of great interest due to the simplicity of the technical implementation, it also has some drawbacks, since it requires a very wide element station. In addition, when the information signal is used at a low frequency, the present invention is considerably unstable against the influence from external interference in a narrow band unless a carrier having a frequency much higher than the band of the information signal is introduced. Become.

Using frequency as a parameter for separating the transmission support signal and the information signal expands the technical possibilities for coding the signal by frequency modulation of the frequency components of the signal. .

Also, for example, the absence of ultra-wide band linear delays not only simplifies the technical realization, but also increases the protection against those disturbances, and further filters the narrow band disturbances. become able to.

To implement the present invention by utilizing the frequency separation between the transmission information signal and the transmission support signal, the following method can be employed. This is to select a central frequency by obtaining a necessary frequency difference between the transmission information signal and the transmission support signal at the stage of generating the information signal.

This, in a sense, takes into account the spectral width of the information signal itself and the need for frequency carriers for different transmitted information signals, and also defines the lowest value of the central frequency of the information signal. I do. However, the maximum value of the central frequency is limited by the maximum tolerance of the differences discussed above.

That is, it is specified because the decorrelation between the transmission information signal and the support signal, which has been seen earlier, is not allowed when passing through the connection of the transceiver and the propagation channel.
At that time, a method of multiplying a corresponding information signal by a carrier is used to generate an information signal to be transmitted, and a carrier is used as a transmission support signal.

At the time of reception, after performing filter processing and amplification processing in advance, two signals are generated from the received transmission signal, that is, a reception information signal and a reception support signal. The amplification of the signals is chosen to ensure the best multiplication of these signals in the subsequent cross-correlation process.

At this time, there must be no time lag between these signals. In the correlation processing and the separation of the information signal, the received information signal is multiplied by the support signal, and the multiplication result is subjected to multi-channel filtering using a band-specific filter. Each of the filters is tuned to the central frequency of the corresponding information signal and has a band matched to its spectral width.

The further multi-channel extension, jam protection, and confidentiality of the present invention can be obtained as follows. That is, a time difference and a frequency difference are simultaneously introduced between the generated transmission information signal and the support signal.

For example, this can be achieved by introducing a delay defined by the carrier spectrum width in the above method where frequency separation is used in generating a transmission support signal or a transmission information signal. In addition, they may be compensated for at the time of reception immediately before the correlation processing.

In the case of generating all transmission information signals with a uniform delay in reception, it is sufficient to introduce a delay only when generating the received support signal. Otherwise, for each delay introduced in the transmission, it will be necessary to compensate for this delay and to correlate it during reception.

There are other ways to utilize other parameters and to distinguish between the transmitted information signal and the support signal. The coding when generating these signals from the carrier also uses, for example, polarization discrimination, coding in time or frequency, or more complex in time and frequency, coding in amplitude. You can also.

[0066]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The essence of the present invention can be further clarified in an apparatus according to a specific embodiment. These block diagrams are shown in FIGS. 1, 2 and 3 of the accompanying drawings.

A. First Embodiment FIG. 1 is a block diagram illustrating a configuration of an information transceiver to which an information transmission / reception method according to a first embodiment of the present invention is applied.

In FIG. 1, 1 is a carrier generator,
An ultra-wide band carrier having a bandwidth fc is generated at a frequency in the UHF band. Although not shown, this carrier is, for example, white noise (noise having a uniform amplitude characteristic over a wide band).
Is generated based on

[0069] The spectral density within the occupied bandwidth of the carrier is generally uniform, the value of fc is much greater than the bandwidth of the information to be transmitted, its spectrum f _{m in} (the band of lower frequencies) Is balanced.

For example, fc = 2 GHz, f _min = 1 GHz
z or fc = 5 GHz, f _min = 5 GHz. The band of the noise signal affects the quality of the information transmission device, and when the amount of information increases, the compression coefficient k
(K = bandwidth of received signal / bandwidth of transmitted signal) increases. Instead, as described above, the anti-jamming property and confidentiality of the device are increased.

Reference numeral 2 denotes a two-branch device, which separates a carrier output from the carrier generator 1 into two signals (a transmission information signal in which a support signal and an information signal are multiplied). The two-branch device 2 is, for example, an LPF (Low Pass Filter).
r: Low-pass filter and HPF (High Pass Filter:
And a branch circuit configured to perform band-specific processing.

The delay circuit 3-1 is configured, for example, as a part of the same band circuit so as to delay one of the signals output from the two-branch device 2 (the transmission information signal in the present embodiment) by the time T. ing. Since the time T must be greater than the reciprocal of the band of the signal output from the carrier generator 1, it is set to, for example, 1n (nano) seconds.

When the second information signal, which is not allowed in the first information signal, must be transmitted due to the parameters, and when the second channel is created, the delay is as follows.
It must be distinguished from the first channel and must not be smaller in magnitude than can be output on time from the carrier generator 1. That is, it must be a value corresponding to the reciprocal of the band of this signal, for example, 2 nsec.

The multiplier 4-1 multiplies the information signal output from the information signal generator 5 with the signal output from the delay circuit 3-1 and outputs a transmission information signal. This transmission information signal is combined with a support signal, which is a signal output from the second output terminal of the splitter 2, in the adder / amplifier 6, and a transmission signal is generated.

To obtain a desired output ratio between the transmission information signal and the support signal is necessary to modulate the transmission information signal with the support signal, and to use an amplifier 4-2 in a receiving apparatus described later.
Is essential for optimizing the operating regime of the transmitter / receiver, so that the summing / amplifier 6 can have different amplification factors for the transmitted information signal and the support signal.

These coefficients depend on various factors, for example, the type of noise signal output from the carrier generator 1,
Transfer coefficient of multiplier 4-1 and number of transmission information signals, multiplier 4-2
And the degree of confidentiality required for transmitted information.

In order to achieve a desired output in the adder / amplifier 6, the transmission signal is amplified at a specified amplification factor. In addition, in order to reduce the energy consumption and at the same time minimize the interference of the RTS level at the output terminals of the multiplier 4-1 and the addition / amplifier 6, a filter for each band in the transmission signal band is added to the addition / amplifier 6. Provide.

In order to reduce the required dynamic range in the circuit of the multiplier 4-1 and the adder / amplifier 6, and to increase the output of the transmitter, the amplitude of the signal output from the carrier generator 1 must be reduced. Can be limited to the limit. The signal thus obtained is radiated from the transmitting antenna 7.

The delay circuit 3-1 may be provided in the support signal generation circuit, that is, between the two-branch device 2 and the addition / amplifier 6.

The transmission signal radiated from the transmission antenna 7 is received by the reception antenna 8 on the reception base side, and is filtered and amplified by the BPF / AMP 9 having the band-pass filter (BPF) and the amplifier in the preceding stage.

The role of the BPF in the previous stage is to block external signals unrelated to the transmission signal. This is particularly important when the interference is strong and the interception alone is not sufficient due to the correlation processing. Further, it is preferable to use an input circuit having as low noise as possible.

The BPF / AMP 9 outputs signals from two output terminals. One of them outputs the delay circuit 3-2 for compensating the carrier delay in the delay circuit 3-1 at the time of generating the transmission information signal. Pass and form the received support signal.

On the other hand, the second output signal of BPF / AMP 9 is a received transmission information signal. BPF /
The level at which the AMP 9 exits is selected so as to obtain the optimum multiplication in the multiplier 4-2 embodiment.

The signal from the multiplier 4-2 enters the BPF 10 which is adjusted to the central frequency of the information signal and has a band corresponding to the signal. At this time, if the information signal does not have a frequency carrier, the BPF 10 degenerates to a lower frequency filter.

However, in this case, the interference protection of the communication channel is deteriorated. At the output of the BPF 10, a received information signal is formed, which enters an information demodulator 11 where it is returned to the form required by the user.

The technical embodiment shown in FIG. 1 does not cause any particular difficulty. However, the bandwidth fc is actually limited because it is difficult to manufacture an adder, an antenna, a transceiver and the like in a very wide area.

However, even an existing element station can generate and process a signal having a band of one octave or more. The carrier generator 1
It can also be configured as a wide area noise generator, for example, in the form of various circuits such as transistors, noise diodes, spark discharge formation, and the like.

In addition to the noise signal generation, the carrier generator 1
Need to include some form of band-specific filter, but there is no special condition for that filter.

The multiplier 4-1 must be capable of supporting a wide range, and more preferably, in technical implementation,
It is better not to generate odd harmonics. Otherwise, a harmonic component that does not carry information appears in the transmitted information signal.

This is because the output of the received information signal cannot be amplified by the interaction with the support signal by the multiplier 4-2, and the correlation between the signal and the noise only deteriorates.

In addition, this correlation is reduced by losing some of the transmitted output. actually,
As such a multiplier, a wideband balanced modulator is used.

As described above, in the present embodiment, when generating a transmission information signal and a support signal during transmission, one of them is delayed, and upon reception, the two are distinguished temporally. .

B. Second Embodiment FIG. 2 is a block diagram illustrating a configuration of an information transceiver to which an information transmission / reception method according to a second embodiment of the present invention is applied. In FIG. 2, parts corresponding to the respective parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted. This embodiment is an example in which frequency is used as a variable parameter to be coded.

In the present embodiment, in order to reduce the dynamic range required for the connection between the transmitter and the receiver, reinforce the interference protection, and simplify the separation of several information signals transmitted simultaneously, The information signal generator 5 is composed of two blocks.

In the information signal generator 5, reference numeral 12 denotes a modulation signal generator, which generates a signal based on transmission information, and this signal frequency-modulates the signal generated by the control signal generator 13. The frequency-modulated signal output from the control signal generator 13 is the output signal of the information signal generator 5, that is, as an information signal, as described above with reference to FIG. Later, the carrier is multiplied by the multiplier 4-1.

At the time of reception, as in the case of transmission, no special delay circuit is provided. Also, mutual temporal addition of the two signals is not allowed. For example, this is because the transmission information signal and the support signal use different paths to obtain the required amplitude when entering the multiplier 4-2.

According to the configuration shown in FIG. 2, several information signals can be transmitted simultaneously. In this example, one multiplier 4-2 is used for all information signals,
Separation of information signals is performed by setting the number corresponding to the BPF 10 in parallel, and each filter is adjusted according to its own information signal. The signal output from the BPF 10 enters the information demodulator 11, where it is somehow
These signals are demodulated and returned to the required form.

C. Third Embodiment FIG. 3 is a block diagram showing a configuration of an information transceiver to which an information transmission / reception method according to a third embodiment of the present invention is applied. In FIG. 3, the same reference numerals are given to portions corresponding to the respective portions shown in FIG. 1 or FIG. 2, and description thereof will be omitted.

This embodiment shows an example in which two parameters, time and frequency, are used to distinguish between an information signal and a support signal, and further shows a case where one information signal is transmitted. .

This block diagram is interesting in its configuration. Firstly, the support signal is additionally coded by two parameters, and secondly, several information signals in the circuit shown in FIG. 2 are converted into a simple multi-channel parallel signal. It is a processing point.

The difference between the configuration shown in FIG. 3 and the configuration shown in FIG. 2 is that the delay circuit 3-1 is used for all transmission information signals and the reception signal is generated when the received support signal is generated. Is delayed by one delay circuit 3-2 to compensate.

As described above, according to the configuration shown in FIG. 3, the support signal is transmitted to the receiving station of the communication channel simultaneously with the information signal, where it is used for correlation processing.

At this time, it is necessary to know not the support signal itself but the generation rule thereof, that is,
It is assumed that some basic parameters are known, such as, for example, the signal spectrum width and the difference from the information signal.

If, at the time of reception, the coding rules for the support signal and the information signal are known in advance, it is possible to obtain, at the output of the correlation processing device, a component defined by the matching process of the transmission carrier.

Of course, a disturbing effect may appear in the support signal. Also, in the transmission information signal, the correlation between the effective signal and the interference may change, and may differ from a general correlation using a known support signal generated in the receiving station.

However, if the above-mentioned condition requirements are met, such losses will be very small, and under certain conditions, for example, the minimum signal-to-interference ratio at the stage of entering the correlation processing device. If it can be limited, it does not exceed the size allowed from a practical viewpoint (3 to 10 dB in the present embodiment).

This is because the technical embodiment is significantly simplified compared to the current radio channel.
Current wireless channels have approximately similar characteristics in radius of operation, but with significant degradation in terms of jamming protection, confidentiality, and stability to propagation conditions.

Needless to say, the application fields of the above-described apparatus are as follows.
They are limited by the specific circumstances in which they are used. That is, the allowable loss or the minimum allowable S / N ratio when entering the correlation processing device is defined. In general, energy calculations are very complicated.

However, considering that the minimum allowable S / N ratio entering the correlation processing device is smaller than 1, a simplified calculation method can be used. For example, it is assumed that the minimum S / N ratio required at the input of the processing circuit is 20 dB and the compression coefficient K is 60 dB.

In this case, in the matching processing, the S / N ratio required at the input of the correlation processing device is -40 dB.
However, in this method, when the S / N ratio is small, a square loss occurs, and the minimum allowable S at the input of the correlation processing device is obtained.
The / N ratio is only -20 dB in this example.

That is, the loss is 20 dB, which is not acceptable, but when the device according to the method of the present invention is used at a short distance, the transmission power is reduced to, for example, 0.01.
It is only necessary to increase from mV to 1 mV.

In this case, when the input ratio is increased, the S / N loss is reduced, and becomes approximately 10 dB at -15 dB.
However, in this case, as described above, characteristics such as stability against interference increase.

According to the configuration shown in FIG. 2, it can be used for transmitting voice information in a band of 6 kHz level.
In this example, fc is about 0.6 GHz, and f _min is about 0.6 GHz.
z, and the output signal output is 1-3 mV.

At this time, the transmitting antenna has a length of 5 to 6 cm.
Is a dowel type, while the receiving antenna is
With a KSV of 1.5 to 2 levels as the amplification factor, the stable working radius would be several hundred meters under no urban buildings under metropolitan conditions.

However, this depends on the operating conditions (external disturbance),
It depends on the modification of the embodiment. At the same time, these embodiments are completely consistent with the computational characteristics of the device, demonstrating its high performance.

[0116]

As described above, according to the present invention, an ultra-wide band signal having a spectrum width equal to or greater than the lowest frequency of the spectrum is used as a carrier, and based on the carrier, Is modulated by an information signal, and one or more transmission information signals and transmission support signals are generated by adding one or more parameters thereof, wherein the transmission information signal and the transmission support signal are generated. In consideration of the spectrum width of the information signal, at least one of the parameters used for discrimination is set to be larger than an interval allowing a correlation process at the time of reception for the corresponding parameter, and The mutual addition or amplification of the spectral components of the information signal and the support signal is within the allowable range defined by the frequency interval, that is, the transmission signal. The range where the linearity of the connection between the transmitter and receiver and the propagation channel is maintained with the required accuracy in all frequency ranges occupied by the spectrum of the transmitted signal, from the moment of formation to their correlation processing at the time of reception. A transmission signal is generated by adding the transmission support signal and the information signal to a value that does not exceed a larger value, and upon reception, as a support signal, the correlation processing includes receiving and preamplifying and filtering. Utilizing the processed transmission signal, the correlation processing and the separation of each information signal use a carrier transmitted and received in consideration of the difference between the corresponding received transmission information signal and the received transmission support signal. Therefore, the compression factor can be increased by several orders as compared with the latest conventional technology, and at the same time, the problem of realizing a communication channel is considerably simplified. Effect that information transmission and reception method capable of reduction can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an information transceiver to which an information transmission / reception method according to a first embodiment of the present invention is applied.

FIG. 2 is a block diagram illustrating a configuration of an information transceiver to which an information transmission / reception method according to a second embodiment of the present invention is applied;

FIG. 3 is a block diagram illustrating a configuration of an information transceiver to which an information transmission / reception method according to a second embodiment of the present invention is applied;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier generator 2 2-branch device 3-1 and 3-2 Delay circuit 4-1 and 4-2 Multiplier 5 Information signal generator 6 Addition / amplification 7 Transmitting antenna 8 Receiving antenna 9 BPF / AMP 10 BPF 11 Information demodulation Unit 12 Modulation signal generator 13 Control signal generator

Continuation of the front page (72) Inventor Pavel Vladimirovich Volkov Russian Federation Moscow Ur Osenni Blivar 3-228 (56) References JP-A-6-350557 (JP, A) JP-A-6-276173 (JP, A) JP-A-58-197934 (JP, A) JP-A-4-234238 (JP, A) JP-A-57-2144 (JP, A) JP-A-60-4340 (JP JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) H04J 1/00 H04J 13/00

Claims (7)

(57) [Claims] A first step of generating one or more information signals carried by a parameter according to information to be transmitted; a second step of generating a carrier wave transmitting the information signal; A third step of encoding the carrier with the information signal to generate a transmission signal having a support signal and a transmission information signal; and, upon reception, the transmission signal that has been subjected to a filtering process and an amplification process. A fourth step of performing a correlation process with a support signal included in the transmission signal and separating the information signal, wherein (a) the carrier has a spectrum width equal to the lowest frequency of the spectrum; Or using an ultra wideband signal that is greater than or equal to: (b) based on the carrier, modulate it with the information signal, and use one or more of the carriers. By adding one or more parameters to generate one or more transmission information signals and transmission support signals, wherein the difference between the transmission information signal and the transmission support signal is determined by the spectral width of the information signal. In consideration of this, at least one of the parameters used for discrimination is set to be larger than an interval that allows a correlation process at the time of reception for the corresponding parameter, and the mutual relationship between the spectral components of the transmission information signal and the support signal is Addition or amplification is necessary in an allowable range defined by the frequency interval, i.e., in the entire frequency range occupied by the spectrum of the transmission signal, from the moment of generation of the transmission signal to their correlation processing at the time of reception. A value that is greater than the range in which the linearity of the connection between the transceiver and the propagation channel is maintained with accuracy (C) generate the transmission signal by adding the transmission support signal and the information signal; and (d) upon reception, as the support signal, the reception signal, Utilizing also the amplified and filtered transmission signal, the correlation processing and the separation of each information signal take into account the difference between the corresponding received transmission information signal and the received transmission support signal. An information transmitting / receiving method, wherein the carrier wave transmitted and received is used. 2. The information transmitting / receiving method according to claim 1, wherein a continuous noise signal having a required spectrum width is used as the carrier. 3. The information transmission / reception method according to claim 2, wherein the generation of the carrier signal further limits the amplitude of the signal. 4. The information transmitting / receiving method according to claim 1, wherein an output of the transmission support signal is selected according to a mask condition for amplitude modulation of the transmission information signal in the transmission signal. . 5. A delay is introduced when generating the transmission support signal or the transmission information signal, and a difference in a time arrangement between the two signals corresponds to a reciprocal of a spectrum width of the signals. In addition, at the time of reception, the received transmission signal is filtered and amplified in advance, and after introducing a corresponding delay, a reception information signal and the support signal are generated, and a correlation is generated. The information transmission / reception according to any one of claims 1 to 4, wherein the signals are multiplied for processing, and a result of the multiplication is filtered at a center frequency and a frequency band matched with the information signal. Method. 6. When generating the information signal, a center frequency spectrum is selected from the viewpoint of obtaining a necessary difference between the transmission information signal and the transmission support signal, and the generation of the transmission information signal is performed. Multiplying the carrier by a corresponding information signal, the carrier is used as the transmission support signal, and upon reception, after filtering and amplifying the received transmission signal in advance, two signals are obtained. That is, to generate the reception information signal and the reception support signal, and to multiply and multiply these signals to correlate and separate the information signal, the multiplication result is filtered using a band-specific filter. 2. The filter according to claim 1, wherein each filter is set to a center frequency of a corresponding information signal and has a band corresponding to a spectrum width thereof. Information reception method according to any one of 4. 7. When generating the transmission support signal or the transmission information signal, a delay defined by the spectrum width of the carrier is introduced, and upon reception, compensation processing is performed before correlation processing. 7. The information transmitting / receiving method according to claim 6, wherein: