JPH0646217B2 - Radio wave radiation source induction device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for guiding a radio wave radiation source, such as a missile for a radio wave radiation source, which requires tracking guidance for a radio wave radiation source.

[Conventional technology]

FIG. 6 is a block diagram of a conventional radiation source induction device. In the figure, (1) is an antenna that can receive radio waves from multiple radio wave emission sources that generate pulses, and can form two antenna beams that partially overlap each other, and (2) is an external control A receiver that processes only a specific frequency band by the signal and generates a sum signal and a difference signal of the two beams of the antenna (1), (3) an antenna servo that controls the angle of the antenna (1), (4) Is an A / D converter that converts the analog video signal from the receiver (2) to digital, and (5) tracks only a specific pulse repetition number for the signal from the A / D converter (4) The tracking gate, (6) is the gate generator that generates the gate of the tracking gate (5), and (7) is the sum of the sum and difference signals that have passed through the tracking gate (5) and the radio wave emission source for the antenna (1). An angle error detector that calculates the angle error indicating the difference in direction,
(8) is a lock-on discriminator that detects whether the amplitude of the sum signal that has passed through the tracking gate (5) is a certain value or more and determines whether the tracking gate (5) is locked on to the target signal. , (9) are the angle control of the antenna servo (3), the frequency control of the receiver (2) and the gate based on the lock-on information from the lock-on determiner (8) and the angle error information from the angle error detector (7). Control the gate position of the generator (6),
A tracking guidance controller that performs tracking control of the entire guidance device and at the same time transmits guidance control information to the mother machine. (10) is a tracking data memory that stores the transmission frequency of the tracking target, the number of transmission pulse repetitions, the initial position, etc. is there.

FIG. 7 is a diagram for explaining the operation principle of the receiver (2) of the conventional radiation source induction device. In the figure, as shown by, for example, the target 1 is transmitting at the frequency of the band f4,
Receiver (2) when target 2 is transmitting in band f7
When a control signal is issued to select the frequency of band f4, the output is as follows. Using the above principle, the conventional radiation source induction device has a configuration in which the tracking guidance control unit (9) specifies the target frequency band to be tracked in the receiver (2) and performs frequency tracking.

FIG. 8 is a diagram for explaining the operation principle of the tracking gate (5), the gate generator (6), and the lock-on decision device (8) of the conventional radiation source induction device. When there is an input as shown in the figure, the tracking gate is generated when the gate generator (6) generates the gate timing as shown in the figure.
(5) Since only one of the three pulses is output, the lock-on determiner (8) does not make a lock-on determination.

Further, at the gate timing as shown in the figure, three of the three pulses have outputs, and the lock-on judging device (8) makes a lock-on judgment. As described above, in the conventional radiation source induction device, the tracking guidance controller (9) instructs the gate generator (6) to generate a tracking gate signal equal to the pulse repetition rate of the target to be tracked, and the tracking gate (5) If the output matches the received pulse, the lock-on decision unit (8) makes a lock-on decision.

FIG. 9 is an operation flow for explaining the operation of the entire conventional anti-radiation induction device based on the operation principle of the receiver (2), the tracking gate (5), the gate generator (6), and the lock-on decision device (8). It is a chart. The tracking guidance controller (9) is a tracking data memory (10).
The target transmission frequency band to be tracked, the pulse repetition rate, and the general direction are read, and the frequency band to be tracked to the receiver (2) first, the pulse repetition number to be tracked to the gate generator (6), and the antenna servo (3) are tracked. Transfer the general direction data of the target. When the reception frequency from the radio wave emission source and the number of repetitions of the Palwe agree with the data set by the tracking guidance controller (9) and the lock-on judgment device (8) makes a lock-on judgment, the angle error detector (7 )
At the same time, the tracking guidance controller (9) uses the angle control detection data to start the angle tracking and
A guidance control signal for accurately guiding the mother machine to radio wave emission is issued to the mother machine.

[Problems to be solved by the invention]

In the above-mentioned induction device for radio wave radiation sources, for example, when the radio wave radiation source switches and transmits a plurality of transmission frequencies, the lock-on of the lock-on judging device (8) is changed every time the transmission frequency of the radio wave radiation source is switched. Tracking guidance controller
In (9), since the tracking operation is performed again from the beginning, the time for tracking the target radio wave radiation source is reduced, and there is a problem that stable radio wave radiation source tracking and stable guidance of the mother machine are difficult. Atsuta

Further, for example, when the radio wave radiation source transmits a plurality of transmission pulses by switching the number of repetitions, the tracking guidance performance is deteriorated for the same reason as above.

Further, for example, when there are a plurality of radio wave radiation sources, the conventional apparatus has a structure in which only one radio wave radiation source is angle-tracked, so that a single target cannot be identified.

In addition, for example, when the radio wave radiation source transmits radio waves other than the transmission frequency and the number of transmission pulse repetitions, for example, the transmission pulse width while switching, the conventional device uses the gate of the tracking gate (5). Since the width is fixed and the tracking is performed, there is a problem that only the transmitted wave with a single pulse width can be dealt with.

In addition, the radio wave radiation source is, for example, a stagger, a jitter, or a multi-P.
When transmitting with a special pulse interval such as RF ranging or pulse compression wave by Barker code, the tracking gate (5) cannot immediately generate the tracking gate timing similar to the received wave, The drawback was that it could not be tracked.

The present invention has been made to solve the above problems, in which the pulse arrival time and pulse amplitude of a radio wave radiation source are continuously stored in a target memory according to frequency, pulse width, and angle of the radio wave radiation source with respect to an antenna. By writing, the radio wave emission source emitting a plurality of radio wave radiation sources and a plurality of transmission frequencies, a large number of transmission pulse repetitions, and a plurality of pulse widths can be continuously tracked to stabilize the mother machine. The purpose is to accurately guide to the radio wave radiation source.

In addition to the above-mentioned object, another invention of the present invention is to perform accurate pattern identification processing of the radio wave radiation source by performing pattern matching processing on the pulse repetition rate and irregular transmission pulse of the radio wave radiation source. And to guide the tracking of radio wave radiation sources.

[Means for solving problems]

The radio wave radiation source induction device according to the present invention has an antenna whose angle is controlled by an antenna servo, and has a receiver which inputs a reception signal from the antenna and outputs a sum signal and a difference signal of the reception signal. , Has a frequency discriminator for discriminating the frequency of the received wave received by the antenna, has an amplitude detector, a pulse arrival time detector, a pulse width detector, an angle error detector in the latter stage of the A / D converter, A target having an address generator for generating a memory write address from control data, pulse width data, angle control data and angle error data, and writing amplitude data and pulse arrival time based on the address generated by the address generator. It has a memory, the transmitted wave data of the radio wave radiation source written in the target memory, the frequency data from the frequency discriminator, and the antenna servo By the antenna angle data, with tracking guidance control unit that induces parent machine stably in radio source.

In addition to the above, a device for guiding a radio wave radiation source according to another invention of the present invention is provided by checking the pattern matching of data written in a target memory in addition to the above. It has a pulse analyzer for analyzing the transmission pulse pattern of the radio wave radiation source.

[Action]

In this invention, since the tracking guidance controller receives the frequency from the frequency discriminator and can immediately control the reception frequency band of the receiver and the address control of the target memory, a plurality of radio wave radiation sources are provided. Even if the transmission frequency is switched, the receiver control and target memory address control are performed immediately to maintain most of the amplitude and pulse arrival time of the transmission wave from the radio wave radiation source. Can be written to the target memory, and by continuously processing the transmitted wave data of the target memory, stable tracking of the radio wave radiation source and guidance of the mother machine are possible.

Also, by storing the pulse arrival time in the target memory for a long time, the pulse arrival time can be recorded continuously even when the radio wave radiation source switches and transmits a plurality of pulse repetition numbers. It is possible to track the radiation source and guide the mother machine.

In addition, the address generator classifies the pulse width and angle of the radio wave radiation source according to the data of the pulse width detector, the data of the angle error detector, and the angle control data of the antenna, and the pulse arrival time and pulse of the radio wave radiation source are classified. Since the width data can be written in the target memory, for example, even if a plurality of radio wave radiation sources exist in the beam of the antenna, the transmitted wave data can be stored from many radio wave radiation sources at the same time in a state divided by angle. . Further, for example, even when the transmission wave is transmitted while switching a plurality of pulse widths, the transmission wave data can be stored in a state of being classified by the pulse width. For the above reasons, it is possible to track a plurality of radio wave radiation sources, continuously track a radio wave radiation source generated while switching a plurality of plow widths, and guide the mother machine. In another example of the present invention, the pulse arrival time data written in the tracking data memory is compared with the pulse arrival time data detected by performing the detection process on the amplitude data written in the target memory. By comparing the pattern of the pulse repetition number of the transmission wave of the radio wave radiation source written in the tracking data memory, the fixed PRF, staggered PRF, jitter PRF, multi-PRF, and pulse by the Barker code are compared. It becomes possible to analyze the transmission pulse pattern of the compressed wave. Therefore, it is possible to accurately identify the radio wave radiation source and guide the radio wave radiation source.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention. (1)
(4), (7), and (10) are exactly the same as the above conventional device. Reference numeral (11) is a frequency discriminator that discriminates the frequency of the received signal entering the antenna (1) and outputs the discriminated frequency information as a digital signal. (12) is an amplitude detector for detecting the amplitude of the sum signal output of the A / D converter (4), (13) is a pulse arrival time detector for detecting the pulse arrival time for the sum signal data, (14) Is a pulse width detector that detects the pulse width of the sum signal data, and (16) is a target memory that stores the data of the amplitude detector (12) and the pulse arrival time detector (13). Sufficient capacity to record the transmitted wave data of. (15) is the target memory (1
When writing data to 6), write addresses are generated so that the writing position can be classified by angle error, frequency, pulse width, etc., and when reading, it is necessary to select from the above classified data. It is an address generator that generates an address from which only data can be freely read.

(9) is the amplitude data written in the target memory (16), the pulse arrival time data, the frequency data of the frequency discriminator (11), and the antenna angle data from the antenna servo (3). It is a tracking guidance controller that performs tracking and guides the mother machine, and performs tracking control control of the entire device.

In the radiation source induction device configured as described above,
The frequency discriminator (11) discriminates the frequency of the received wave received by the antenna (1), and the tracking guidance controller (9) is set so that the receiver (2) receives at the discriminated frequency. By controlling the reception frequency, it becomes possible to always receive the transmission wave data from the radio wave radiation source.

Also, the sum signal and difference signal from the receiver (2) are A / D converters.
(4) is converted into digital data, and the amplitude, pulse arrival time, pulse width, and angle error are detected.

Among the above data, the amplitude data and the pulse arrival time data are written in the target memory (16) with sufficient capacity and then used as information for tracking and guiding. Even if the repetition rate changes irregularly, it is written in the target memory (16) as an irregular pulse arrival time corresponding to the pulse repetition rate, and all received pulse information can be recorded.

Furthermore, the address generator (15) of the target memory (16) receives the reception frequency data from the tracking guidance controller (9) to the receiver (2) and the angle control data and the angle error detection (to the antenna servo (3)). The angle error data from 7) and the pulse width data from the pulse width detector (14) are stored in the target memory.
Since it is used as the address of (16), it is possible to write multiple radio wave data in an efficiently classified form. Figure 4
Is a diagram explaining that a plurality of radio wave data are written in the target memory (16) in a classified form.
It shows that the two radio wave radiation sources can be distinguished by the reception frequency, angle, and pulse width.

As described above, the apparatus for guiding a radio wave radiation source configured as described above can continuously record data even if the radio wave radiation source discontinuously changes the transmission frequency and the number of transmission pulse repetitions. The stable tracking of the radio wave radiation source and the guidance to the radio wave radiation source are possible. In addition, because it has a memory configuration that can efficiently classify the reception frequency, angle, and pulse width,
The pulse width, etc. can be identified and multiple targets can be dealt with.

FIG. 2 is a block diagram showing another embodiment of the present invention, which is exactly the same as the above-mentioned invention except that a pulse analyzer (17) is added. FIG. 3 is a diagram for explaining the configuration of the pulse analyzer (17), and (18) shows the logical product of the pulse arrival time data from the target memory (16) and the reference data from the tracking data memory (10). (19) is a counting counter that counts the circuit whose logical product is 1 in the theoretical product creating circuit (18), and (20) is a constant value that is counted by the counting counter (19), for example, This is a comparator that outputs a pulse repetition number detection flag when the value is 80% or more of the comparison number for performing one reference.

In the pulse analyzer (17) configured as described above, first of all the pulse arrival time interval patterns stored in the tracking data memory (10) and the data stored in the target memory (16) Then, the pulse arrival time of the radio wave radiation source classified into a specific reception frequency, a specific pulse width and a specific angle is compared, and the number whose logical product becomes 1 is counted by the counting counter (19). The count value of the count counter (19) is a constant value, for example, 8 which is the number of comparisons for performing one reference.
If 0% or more, then tracking data memory (10)
It was determined that there was a high correlation between the pulse arrival time pattern quoted from Section 1 and the pulse arrival time pattern of the radio wave radiation source stored in the target memory (16), and the pulse repetition number detection flag was tracked and guided. Send to container (9). FIG. 5 is a diagram for explaining the above processing, and in the figure (1)
Is an example when the pulse repetition number detection flag is set.
(2) is an example when the flag is not set.

The pulse repetition number detection method according to this method makes it possible to identify a radio wave radiation source having a special pulse interval such as stagger, jitter, multi-PRF ranging, or barker code pulse compression.

By the operation of the pulse analyzer (17) as described above, the tracking guidance controller (9) can perform more accurate identification of the pulse repetition rate in addition to the frequency data, the angle data, and the pulse width data. Therefore, it is possible to more accurately guide the mother machine to the radio wave radiation source.

Needless to say, in the present invention and another invention, the same performance can be obtained even if all the functions of the tracking guidance controller (9) and the pulse analyzer are performed by the software of the microcomputer.

Further, according to the present invention and another invention of the present invention, when data is written in the target memory (16), amplitude data and the like are also written at the same time, and it is possible to use for other purposes such as distance calculation by amplitude. Needless to say.

Further, although the present invention and another invention of the present invention have been described using an antenna capable of forming two antenna beams partially overlapped with each other, an antenna including four antenna beams is also described. It goes without saying that similar processing can be performed.

〔The invention's effect〕

As described above, the present invention mainly controls the reception frequency in the receiver and uses the target memory capable of efficiently classifying the data recorded in the receiver, whereby the radio wave radiation source discontinuously changes the transmission frequency and the like. When it comes, it has the effect that continuous data recording can be performed, stable guidance and tracking can be performed, and multiple data from multiple radio wave radiation sources can be handled.

In addition to the above invention, in another invention of the present invention, a special pulse interval is obtained by comparing the recorded pulse arrival time of the radio wave radiation source with the pulse arrival time pattern stored in the memory in advance and checking the correlation. There is an effect that it is possible to identify a radio wave radiation source having

[Brief description of drawings]

1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an embodiment of another invention of the present invention, and FIG. 3 is an embodiment of another invention of the present invention. It is a detailed block diagram of a pulse analyzer in the figure. FIG. 4 is a diagram for explaining the operation of one embodiment of the present invention, and is an explanatory diagram of the target memory. FIG. 5 is a diagram for explaining an embodiment of another invention of the present invention, and is a diagram for explaining the operation of the pulse analyzer. FIG. 6 is a diagram showing a conventional device for guiding a radio wave radiation source, FIG.
8 and 9 are diagrams for explaining the operation of a conventional induction device for a radio wave radiation source. In the figure, (1) is an antenna, (2) is a receiver, (3) is an antenna servo, (4) is an A / D converter, (5) is a tracking gate, (6)
Is a gate generator, (7) is an angle error detector, (8) is a lock-on decision device, (9) is a tracking guidance controller, (10) is a tracking data memory, (11) is a frequency discriminator, and (12). Is an amplitude detector, (13) is a pulse arrival time detector, (14) is a pulse width detector, (15) is an address generator, (16) is a target memory, (17) is a pulse analyzer, (18). Is an OR circuit, (19) is a counter, and (20) is a comparator. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (2)

[Claims] 1. An antenna configured to form two antenna beams to receive radio waves from a plurality of radio wave radiation sources, an antenna servo for adjusting the beam direction of the antenna, and a reception signal from the antenna. A receiver that outputs a sum signal and a difference signal of two beams and that can switch the frequency band to be received by a control signal from the outside; a frequency discriminator that discriminates the frequency of the received signal received by the antenna; An A / D converter that converts the sum signal and the difference signal from the receiver into a digital signal, and an angle error that indicates the difference in the direction of the radio wave radiation source with respect to the antenna is calculated by the digitized sum signal and the difference signal. An angle error detector, an amplitude detector for detecting the amplitude, pulse arrival time, and pulse width of the sum signal from the digitized sum signal, a pulse arrival time detector, and a pulse detector. Width detector, the amplitude detector output and the pulse arrival time detector output, the frequency discriminator, the pulse width detector, the frequency detected by the angle error detector, the storage location for each pulse width and angle error A target memory that classifies and stores, an address generator that generates an address for writing and reading data in the target memory, and a tracking data memory that stores a transmission frequency of a radio wave radiation source to be tracked and a pulse arrival time. The radio wave radiation source to be tracked by comparing the data stored in the target memory with the data stored in the tracking data memory is specified from a plurality of radio wave radiation sources,
An induction controller for a radio wave radiation source, comprising: an induction controller that reads an angle error of the antenna with respect to the specified radio wave radiation source from the target memory and uses it as a signal for guiding the mother machine. 2. An antenna that constitutes two antenna beams to receive radio waves from a plurality of radio wave radiation sources, an antenna servo that adjusts the beam directions of the antennas, and a received signal from the antennas. A receiver that outputs a sum signal and a difference signal of two beams and that can switch the frequency band to be received by a control signal from the outside; a frequency discriminator that discriminates the frequency of the received signal received by the antenna; An A / D converter that converts the sum signal and the difference signal from the receiver into a digital signal, and an angle error that indicates the difference in the direction of the radio wave radiation source with respect to the antenna is calculated by the digitized sum signal and the difference signal. An angle error detector, an amplitude detector for detecting the amplitude, pulse arrival time, and pulse width of the sum signal from the digitized sum signal, a pulse arrival time detector, and a pulse detector. Width detector, the amplitude detector output and the pulse arrival time detector output, the frequency discriminator, the pulse width detector, the frequency detected by the angle error detector, the storage location for each pulse width and angle error A target memory that classifies and stores, an address generator that generates an address for writing and reading data in the target memory, and a tracking data memory that stores a transmission frequency of a radio wave radiation source to be tracked and a pulse arrival time. , A pulse for identifying a radio wave radiation source having a specific pulse repetition number from among a plurality of radio wave radiation sources by comparing the pulse arrival time stored in the target memory with the pulse arrival time stored in the tracking data memory The angle error of the antenna with respect to the radio emission source identified by the analyzer and the pulse analyzer is stored in the target memory. Reads versus radio source guiding apparatus is characterized in that a tracking guidance control unit to the signal for the mother ship induction.