JP5260700B2 - APD measuring apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the transfer capacity of an interface and the storage capacity of a storage device in APD measurement from being increased. <P>SOLUTION: A two-dimensional map of a signal level in each frequency band component composed of a level axis in which a signal level of each predetermined frequency band component of a signal to be measured acquired at a predetermined sampling period is set as a signal level divided by a logarithmic transformation part 18 and a time axis divided based on a time interval corresponding to the sampling period is created. The created two-dimensional map is divided in each block so as to include each area corresponding to an intersection position in the two-dimensional map and a mask pattern having the highest similarity to a signal level of each area composing the divided block is selected. A code corresponding to the mask pattern is allocated to the block, and respective blocks are transferred from a second data transfer part 25 to a software processing part 3 by predetermined order and timing following transfer rule information. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention analyzes an amplitude component of a signal and measures an Amplitude Probability Distribution (APD) that indicates a cumulative distribution of a time rate in which the magnitude of each frequency component exceeds a predetermined threshold during a predetermined time. The present invention relates to an apparatus and a method.

  APD measurement is one method of obtaining statistical data for obtaining the time probability of a received signal whose amplitude exceeds a certain level. By observing the received signal statistically, it is possible to observe signal characteristics that cannot be seen instantaneously. it can.

  As a conventional APD measuring device, a received signal is converted into digital data by an analog-digital converter (hereinafter simply referred to as “A / D converter”), and the output is divided into a plurality of frequency band components by a filter bank. , The amplitude of each frequency band component is individually weighted and synthesized by a desired amount, the output is received, and the weighted APD obtains the probability based on the frequency of occurrence of the synthesized amplitude after synthesis, and the obtained probability is in various forms Is displayed on the display unit (for example, see Patent Document 1 below).

  When the band of a signal to be measured by such an APD measuring device is wide, when trying to observe the behavior of a temporal signal in detail, the signal is at a speed more than twice the highest frequency in this band. Need to be sampled and observed. Furthermore, when measuring APD, sampling more than 10 times the bandwidth is required. For example, when the measurement band is 10 MHz, it is necessary to observe data by sampling at 10M × 10 = 100 M / second, which is 10 times that band.

  When measuring the APD of this enormous amount of data, it becomes necessary to store and accumulate the data by real-time processing. In order to reduce this real-time processing, the conventional APD measuring device quantizes the sampled data with a precision that does not interfere with practical use, and stores the appearance frequency per certain time (for example, 1 second), thereby generating a probability density function. (PDF, Probability Density function) data is created.

  Since this PDF data is generated at regular time intervals (for example, every second), it is not necessary to execute processing for creating APD statistical data, which is a distribution function obtained by cumulatively adding PDF data, in real time. Processing can be performed at regular intervals, and can be executed by software processing that can easily handle processing that cannot be handled by more complicated hardware such as display processing and signal processing.

  Software processing is slower than hardware in terms of processing speed, but it is a very good implementation method in terms of manufacturing cost and future technology inheritance, and more complicated processing such as control including judgment is required. Therefore, coexistence with hardware processing including the usefulness of software processing is an effective means of realization.

  As described above, the conventional APD measuring device realizes APD measurement by two processes of a real time process and a non-real time process. Here, the real-time processing is processed by hardware, and the non-real-time processing is processed by software.

  In hardware, the received signal is separated into an in-phase (In-Phase, hereinafter simply referred to as “I”) component and a quadrature (Quadrature-Phase, hereinafter simply referred to as “Q”) component, and envelope detection is performed. Logarithmically converted.

  Here, when the signal level is counted every 0.1 dB, by preparing 1000 counters, the signal history can be accumulated every 0, 1 dB when the dynamic range is 100 dB. Similarly, when the signal level is counted every 0.05 dB, by preparing 2000 counters, it is possible to accumulate a signal history every 0.05 dB with a dynamic range of 100 dB.

  Since these counters need to be prepared for each frequency band component, for example, assuming that the sampling period is 100 M / s and the quantized level of the counter is 1000 levels, a maximum of 100 M × 1000 per second × 1000 The content value of the count is transferred from the hardware to the software processing side. Since an integer value up to 100M can be expressed by 28 bits, in this example, the count value for each frequency band component is transferred at 28 × 1000 = 28 kb / s. On the other hand, in the case of transferring time-series data after envelope detection, a transfer amount of 1.6 Gb / s, which is 100 M / s × 16 bits per second (16 bits per sample) is required.

JP 2008-275401 A

  By the way, in APD measurement, there is a need to know each sampled signal level. For example, when an abnormal value is detected during APD measurement, knowing what kind of signal appeared at that time is useful information for investigating the cause of the abnormality and taking countermeasures.

  However, in the conventional APD measurement apparatus, if the observation is performed from a micro standpoint, the capture rate of the time axis is increased. As described above, the transmission capacity of the interface for transferring a large amount of time series data from the hardware to the software processing side. In addition, since the storage capacity on the software processing side is insufficient, there is a problem that a large-capacity storage device for storing a large amount of sampled time-series data on the software processing side has to be prepared.

  Therefore, the present invention has been made in view of the above problems, and is an APD that can transfer a large amount of time-series data to the software processing side without a shortage of the interface transmission capacity and the storage capacity on the software processing side. It is an object to provide a measuring apparatus and method.

In order to achieve the above object, an APD measurement apparatus according to claim 1 of the present invention includes a hardware unit 2 configured by hardware and a software processing unit 3 that executes software processing, and a measurement target signal. In the APD measuring apparatus 1 that measures the APD by analyzing the frequency component of
The hardware unit logarithmically converts the signal level of each predetermined frequency band component of the measurement target signal acquired at the predetermined sampling period,
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A two-dimensional map creation unit 21 that divides each block so as to include each area,
The signal level of each area constituting the divided block is compared with a mask pattern set in advance according to the number of blocks to be divided, and the mask pattern having the highest similarity with the block to be compared is selected. A pattern matching determination unit 23 for
A code assigning unit 24 for assigning a code corresponding to the selected mask pattern;
A second data transfer unit 25 that transfers the code to the software processing unit in a predetermined order and timing in accordance with preset transfer rule information;
The software processing unit receives the code from the second data transfer unit based on the reception rule information corresponding to the transfer rule information, and restores the signal level of each frequency band number component.

The APD measuring apparatus according to claim 2 includes a hardware unit 2 configured by hardware and a software processing unit 3 that executes software processing, and analyzes the frequency component of the measurement target signal to measure APD. In the APD measuring device 1 that
The hardware unit logarithmically converts the signal level of each predetermined frequency band component of the measurement target signal acquired at the predetermined sampling period,
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A two-dimensional map creation unit 21 that divides each block so as to include each area,
An average level value calculation unit 26 for calculating an average level value obtained by averaging the signal levels of the respective areas in the divided block;
A level including the average level value calculated by collating the calculated average level value with the encoding processing information associated with the code assigned to each level range when the range is divided for each predetermined level A level collation determination unit 27 for finding out a range and outputting code information of the corresponding level range;
A code assigning unit 24 for assigning a code according to the code information from the level collation determining unit;
A second data transfer unit 25 that transfers the code to the software processing unit 3 in a predetermined order and timing according to preset transfer rule information;
The software processing unit receives the code from the second data transfer unit based on the reception rule information corresponding to the transfer rule information, and decodes and restores the signal level of each frequency band number component. To do.

The APD measurement method according to claim 3, wherein the APD is measured by analyzing the frequency component of the signal to be measured and measuring the APD.
A signal level acquisition step for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at a predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A step of creating a two-dimensional map for dividing each block so as to include each area,
The signal level of each area constituting the divided block is compared with a mask pattern set in advance according to the number of blocks to be divided, and the mask pattern having the highest similarity with the block to be compared is selected. Pattern matching determination step,
A code assignment step for assigning a code according to the selected mask pattern;
A transfer step of transferring the codes in a predetermined order and timing according to preset transfer rule information;
A decoding step of receiving the code based on the reception rule information corresponding to the transfer rule information and restoring the signal level of each frequency band number component;
It is characterized by including.

The APD measuring method according to claim 4, wherein the APD is measured by analyzing the frequency component of the signal to be measured and measuring the APD.
A signal level acquisition step for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at a predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A step of creating a two-dimensional map for dividing each block so as to include each area,
An average level value calculating step for calculating an average level value obtained by averaging the signal level of each area in the divided block;
A level including the average level value calculated by collating the calculated average level value with the encoding processing information associated with the code assigned to each level range when the range is divided for each predetermined level A level collation determination step of finding a range and outputting code information of the corresponding level range;
A code assignment step for assigning a code corresponding to the code information obtained in the level collation determination step;
A transfer step of transferring the codes in a predetermined order and timing according to preset transfer rule information;
A decoding step of receiving the code based on the reception rule information corresponding to the transfer rule information and restoring the signal level of each frequency band number component;
It is characterized by including.

  According to the APD measuring apparatus of the present invention, the signal level for each sampled frequency band component can be compressed by irreversible encoding, and when the interface transmission capacity and the storage capacity on the software processing side are not insufficient, Series data can be transferred to the software processing side.

It is a functional block diagram which shows the system configuration | structure of the APD measuring apparatus of the 1st form which concerns on this invention. It is a conceptual diagram of the two-dimensional map created by the two-dimensional map creation unit. It is explanatory drawing which shows the Example of a mask pattern. It is a functional block diagram which shows the system configuration | structure of a software processing part. It is a functional block diagram which shows schematic structure of the APD measuring apparatus of the 2nd form which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited by this embodiment, and all other forms, examples, operation techniques, etc. that can be implemented by those skilled in the art based on this form are included in the scope of the present invention. .

[1. First form]
(1-1. Device configuration)
First, the configuration of the APD measuring apparatus according to the first embodiment of the present invention will be described with reference to FIG. In the embodiment described below, an example in which APD is measured using a signal obtained from an external radio wave received outdoors or the like as a measurement target signal will be described.

  As shown in FIG. 1, an APD measuring apparatus 1 according to a first embodiment includes a hardware unit 2 configured by various hardware, a software processing unit 3 that executes software processing, and a hardware processing unit 2 to a software processing unit 3. And an interface 4 for transferring data.

  The hardware unit 2 includes an RF receiving unit 11 that receives an RF (Radio Frequency) signal via an antenna 10 and a down converter 12 that downconverts the RF signal into a baseband signal (hereinafter simply referred to as “D / C”). An A / D converter 13 that converts the baseband signal into a digital signal, a band limiting filter 14 that limits the band of the digital signal in the band to be measured, and the band-limited signal as an I component and a Q component. An I / Q separator 15 for separating the frequency band components, a filter bank 16 for extracting each frequency band component predetermined as a measurement target, an envelope detector 17 for detecting an envelope for each frequency band component, and envelope detection And a logarithmic conversion unit 18 for logarithmically converting the result of the above.

  The filter bank 16 is composed of a plurality of bandpass filters respectively corresponding to the I component and Q component of each frequency band component to be measured. The envelope detection unit 17 includes a plurality of envelope detection circuits corresponding to each frequency band component to be measured, and each envelope detection circuit is based on the corresponding frequency band component I component and Q component. Thus, the signal level of each frequency band component is calculated by square detection.

  The logarithmic conversion unit 18 is configured by a plurality of logarithmic conversion circuits corresponding to each envelope detection circuit, and performs logarithmic conversion of the signal level of each frequency band component in dB units. That is, the frequency band component to be measured and the signal level are divided according to the resolution when quantized for each predetermined level (for example, the dynamic range is 100 dB and the frequency range is divided into 1000 at 0.1 dB intervals).

  Note that the A / D conversion unit 13, the band limiting filter 14, the I / Q separation unit 15, the filter bank 16, the envelope detection unit 17, and the logarithmic conversion unit 18 in the present embodiment constitute a signal level acquisition unit in the present invention. .

  The counter unit 19 is configured by a plurality of counters corresponding to the frequency band component to be measured and the resolution when the signal level is quantized, and accumulates the frequency of appearance of the logarithmically converted signal level for each frequency band component. For example, the counter unit 19 is configured by 1000 × N counters when the number of frequency band components to be measured is N, the dynamic range is 100 dB, and signal history is accumulated every 0.1 dB.

  The first data transfer unit 20 transfers the value of each counter constituting the counter unit 19 to the software processing unit 3 via the interface 4 at a constant time interval T (for example, every 1 second). Each counter constituting the counter unit 19 automatically performs a process of setting the count value to 0 when the transfer of the count value to the first data transfer unit 20 is completed at the time interval T.

  Furthermore, the hardware unit 2 includes a two-dimensional map creation unit 21, a storage unit 22, a pattern matching determination unit 23, a code assignment unit 24, and a second data transfer unit 25.

  As shown in FIG. 2, the two-dimensional map creation unit 21 has a level axis (dB) with the vertical axis as the signal level divided by the logarithmic conversion unit 18 (divided into 100 levels in this example), and the horizontal axis as the band limit. A time axis (t) that is a time divided based on a time interval of a sampling period according to the specification of the filter 14 (for example, when the measurement band is 1 MHz, an interval of 10 M / second, which is 10 times the band), A signal level for each frequency band component corresponding to the position is quantized to create a two-dimensional map represented by an area of “0” or “1”. That is, the signal level “1” of the frequency band component at a certain time t in the map is one. And it divides | segments per block for every predetermined interval so that the arbitrary areas on this map (at least 2 areas or more in a time-axis direction or a level-axis direction) may be included. In the illustrated example, four areas are divided into one block.

  The storage unit 22 stores a plurality of mask patterns generated based on the number of areas in the block in order to compare the signal level and similarity in the block partitioned by the two-dimensional map creation unit 21. In this example, since four areas are divided into one block, there are a maximum of nine types of mask patterns as shown in FIGS. 3A to 3I, and at least FIG. 3A and FIG. Any one of b) to (e) and one of FIGS. 3 (f) to 3 (i) may be used in total. In addition, the storage unit 22 stores encoding processing information in which a code assigned when each mask pattern is encoded and each mask pattern are associated with each other. Further, the storage unit 22 stores transfer rule information that defines in what order and timing the code assigned to the mask pattern is transferred to the software processing unit 3.

  The pattern matching determination unit 23 compares the signal level of each area constituting the block formed by the two-dimensional map generation unit 21 with various mask patterns stored in the storage unit 22 and has the highest similarity. A high mask pattern is selected, and mask pattern information corresponding to the selected mask pattern is output to the code allocation unit 24.

  The code allocation unit 24 allocates a code corresponding to each mask pattern to the mask pattern information from the pattern matching determination unit 23 based on the encoding processing information in the storage unit 22 and outputs the code to the data transfer unit. For example, when the three mask patterns in FIGS. 3A, 3B, and 3F are used among the mask patterns in FIG. 3, “01” is added to the pattern in FIG. A code is assigned such as “10” to the pattern and “11” to the pattern of FIG. As a result, the information in the block is irreversibly encoded, and in the example of FIG. 2, the information in the four areas in the block is compressed as one piece of information.

  The second data transfer unit 25 is a software processing unit via the interface 4 in a predetermined order and timing according to the transfer rule information stored in the storage unit 22 for the codes allocated to the mask patterns by the code allocation unit 24. 3 is transferred.

  As shown in FIG. 4, the software processing unit 3 includes a control unit 30, a storage unit 31, an input unit 32 including a keyboard device and a pointing device, and a liquid crystal display, each connected to a bus constituting the interface 4. And a display unit 33 including a display device such as the above.

  The storage unit 31 is composed of, for example, a semiconductor memory such as a ROM or a RAM or an HDD, and causes each unit constituting the software processing unit 3 such as a processing program for executing APD measurement from the second data transfer unit 25 to function. The various programs are stored. In addition, the storage unit 31 is decoded by the control unit 30, encoding processing information that associates the count value from the first data transfer unit 20, the code from the second data transfer unit 25, each mask pattern with the code to be assigned. In addition, information on restoration of the signal level of each block is stored. Furthermore, the storage unit 31 stores transfer rule information stored in the storage unit 31 of the hardware unit as reception rule information. The reception rule information is information for decoding the mask pattern code transferred from the hardware unit 2 at the same timing as the transfer order.

  The control unit 30 performs processing control of each unit constituting the software processing unit 3 by executing various programs stored in the storage unit 31. In addition, the control unit 30 controls the display unit 33 to display the APD calculated based on the counter value of each counter transferred from the first data transfer unit 20 and the signal level of each restored frequency band component. Further, the control unit 30 decodes the signal level for each frequency band component based on the encoding processing information and the reception rule information stored in the storage unit 31 from the code from the hardware unit 2 and from the input unit 32. Display control is performed on the display unit 33 in accordance with the display instruction.

(1-2. Processing operation)
Next, the processing operation of the APD measuring apparatus 1 in the first embodiment will be described. First, APD measurement is started in accordance with an input instruction from the input unit 32, and an RF signal is received by the RF reception unit 11 via the antenna 10, and the RF signal is received by the D / C 12, the A / D conversion unit 13, and the band limitation. The signal level for each frequency component of the measurement target signal is acquired by the filter 14, the I / Q separator 15, the filter bank 16, the envelope detector 17, and the logarithmic converter 18.

  The signal level value for each frequency band component of the measurement target signal acquired in this way is transferred from the hardware unit 2 to the software processing unit 3 and stored in the storage unit 31 for each frequency band component.

  In the hardware unit 2, the vertical axis is the level axis with the signal level divided by the logarithmic conversion unit 18, and the horizontal axis is the time divided based on the time interval of the sampling period according to the specifications of the band limiting filter 14. A two-dimensional map is created by quantizing the signal level for each frequency band component corresponding to these intersection positions on the time axis.

  The block is divided so as to include each area corresponding to the intersection position in the created two-dimensional map, and the signal level of each area constituting the divided block is collated with various mask patterns stored in the storage unit 22 Then, the mask pattern having the highest similarity is selected. Then, a code corresponding to each mask pattern is assigned based on the mask pattern information corresponding to the selected mask pattern and the encoding process information, and software is transmitted from the second data transfer unit 25 in a predetermined order and timing according to the transfer rule information. Transfer to the processing unit 3.

  The software processing unit 3 decodes the signal level for each frequency band component based on the encoding processing information and the reception rule information for the code from the hardware unit 2.

  As described above, the APD measuring apparatus 1 according to the first embodiment described above includes the level axis that is the signal level divided by the logarithmic conversion unit 18 and the time axis that is divided based on the time interval according to the sampling period. A two-dimensional map of the signal level for each frequency band component is created. Next, it is divided into blocks so as to include each area corresponding to the intersection position in the created two-dimensional map, and a mask pattern having the highest similarity in the signal level of each area constituting the divided block is selected. . A code corresponding to the mask pattern is assigned and transferred from the second data transfer unit 25 to the software processing unit 3 in a predetermined order and timing according to the transfer rule information.

  As a result, the signal level for each sampled frequency band component can be compressed by lossy encoding, and a large amount of time-series data can be transferred to the software processing side without running out of the transmission capacity of the interface 4 or the storage capacity of the software processing side. Can be transferred to.

  In this embodiment, when there is a certain margin in the transfer capacity of the interface 4 and the storage capacity of the storage device, the mask pattern is prepared in advance by the number of patterns corresponding to the number of areas in the block to be divided. The reproducibility of the signal level can be improved at the time of decoding by the processing unit 3.

[2. Second form]
(2-1. Device configuration)
Next, the APD measuring apparatus 1 according to the second embodiment of the present invention will be described. In the present embodiment, the same constituent elements as those of the APD measuring apparatus 1 of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, in the APD measuring apparatus 1 of the second form, the configuration of the hardware unit 2 constituting the APD measuring apparatus 1 of the first form is added to the two-dimensional map created by the two-dimensional map creating part 21. An average level value calculation unit 26 for calculating an average value of signal levels in the divided blocks, and encoding processing information in which the calculated average level value is set in advance (each level range and range when divided into ranges for each predetermined level) And a level collating / determining unit 27 that outputs code information corresponding to a corresponding level range by collating and discriminating information associated with a code assigned for each).

  In the second embodiment, since these configuration requirements are provided, the storage unit 22 stores the above-described encoding processing information, and the code allocation unit 24 allocates a code corresponding to the code information from the level collation determination unit 27. It is the structure which performs a process.

  The average level value calculation unit 26 determines the dB value corresponding to the signal level of each area in the block divided on the two-dimensional map (that is, the dB of the area whose signal level is “1” in the block to be determined). Value) is averaged, and the calculated average level value is output to the level collation determination unit 27.

  The level collation determining unit 27 finds a level range including the average level value calculated by collating the average level value from the average level value calculating unit 26 with the encoding processing information stored in the storage unit 22 and corresponding. Code information corresponding to the level range is output to the code assignment unit 24.

(2-2. Processing operation)
Next, the processing operation in the APD measuring apparatus 1 according to the second embodiment will be described. Note that the processing content from the start of measurement until the signal level for each frequency component of the measurement target signal is acquired is the same as in the first embodiment, and is therefore omitted. Only the processing content that is the main part of the second embodiment will be described.

  In the hardware unit 2, the vertical axis is the level axis with the signal level divided by the logarithmic conversion unit 18, and the horizontal axis is the time axis with the time divided based on the time interval of the sampling period according to the specifications of the band limiting filter 14. The two-dimensional map is created by quantizing the signal level for each frequency band component corresponding to the intersection position.

  A block unit is divided so as to include each area corresponding to the intersection position in the created two-dimensional map, and an average value of signal levels in the divided block is calculated. Then, the average level value calculated by the level collation determination unit 27 is collated with the encoding processing information stored in the storage unit 22 to find a level range including the average level value, and the code information corresponding to the corresponding level range The code assigning unit 24 assigns a code based on the above, and transfers the code from the second data transfer unit 25 to the software processing unit 3 in a predetermined order and timing according to the transfer rule information.

  The software processing unit 3 decodes the signal level for each frequency band component based on the encoding processing information and the reception rule information for the code from the hardware unit 2.

  As described above, the APD measuring apparatus 1 according to the second embodiment described above includes the level axis that is the signal level divided by the logarithmic conversion unit 18 and the time axis that is divided based on the time interval according to the sampling period. A two-dimensional map of the signal level for each frequency band component is created. Next, the block is divided so as to include each area corresponding to the intersection position in the created two-dimensional map, and the average value of the signal levels in the divided block is calculated. Then, the predetermined encoding process information and the calculated average level value are collated and assigned, and a code corresponding to the corresponding level range is assigned. The data is transferred to the software processing unit 3 at the timing.

  As a result, the signal level for each sampled frequency band component can be compressed by lossy encoding, and a large amount of time-series data can be transferred to the software processing side without running out of the transmission capacity of the interface 4 or the storage capacity of the software processing side. Can be transferred to.

  In the above-described embodiment, the configuration in which the average level value in all the blocks on the two-dimensional map is calculated and encoded is described as being restored by the software processing unit 3. However, the present invention is not limited to this. The software processing unit 3 is configured by selecting a block required by the user on the two-dimensional map, encoding only the average level value in this block, and assigning and transferring the shortest code for the other blocks. Can reduce the burden of decryption.

DESCRIPTION OF SYMBOLS 1 ... APD measuring apparatus 2 ... Hardware part 3 ... Software processing part 4 ... Interface 10 ... Antenna 11 ... RF receiving part 12 ... D / C
DESCRIPTION OF SYMBOLS 13 ... A / D conversion part 14 ... Band-limiting filter 15 ... I / Q separation part 16 ... Filter bank 17 ... Envelope detection part 18 ... Logarithmic conversion part 19 ... Counter part 20 ... First data transfer part 21 ... Two-dimensional map Creation unit 22, 31 ... Storage unit 23 ... Pattern collation determination unit 24 ... Code allocation unit 25 ... Second data transfer unit 26 ... Average level value calculation unit 27 ... Level collation determination unit 30 ... Control unit 32 ... Input unit 33 ... Display Part

Claims (4)

In an APD measurement apparatus (1) that includes a hardware unit (2) configured by hardware and a software processing unit (3) that executes software processing, and that analyzes a frequency component of a measurement target signal and measures APD ,
The hardware unit is a signal level acquisition unit (13 to 18) for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at the predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A two-dimensional map creating unit (21) that divides each block so as to include each area,
The signal level of each area constituting the divided block is compared with a mask pattern set in advance according to the number of blocks to be divided, and the mask pattern having the highest similarity with the block to be compared is selected. A pattern matching determination unit (23) to perform,
A code assigning unit (24) for assigning a code corresponding to the selected mask pattern;
A second data transfer unit (25) for transferring the code to the software processing unit 3 in a predetermined order and timing according to preset transfer rule information;
The software processing unit receives the code from the second data transfer unit based on the reception rule information corresponding to the transfer rule information, and restores the signal level of each frequency band number component. apparatus. In an APD measuring apparatus (1) that includes a hardware unit 2 configured by hardware and a software processing unit (3) that executes software processing, and that analyzes a frequency component of a measurement target signal and measures APD,
The hardware unit is a signal level acquisition unit (13 to 18) for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at the predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A two-dimensional map creating unit (21) that divides each block so as to include each area,
An average level value calculation unit (26) for calculating an average level value obtained by averaging the signal levels of each area in the divided block;
A level including the average level value calculated by collating the calculated average level value with the encoding processing information associated with the code assigned to each level range when the range is divided for each predetermined level A level collation determining unit (27) for finding out a range and outputting code information of the corresponding level range;
A code assigning unit (24) for assigning a code according to the code information from the level collation determining unit;
A second data transfer unit (25) for transferring the code to the software processing unit 3 in a predetermined order and timing according to preset transfer rule information;
The software processing unit receives the code from the second data transfer unit based on the reception rule information corresponding to the transfer rule information, and decodes and restores the signal level of each frequency band number component. APD measuring device. In the APD measurement method for measuring the APD by analyzing the frequency component of the signal to be measured,
A signal level acquisition step for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at a predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A step of creating a two-dimensional map for dividing each block so as to include each area,
The signal level of each area constituting the divided block is compared with a mask pattern set in advance according to the number of blocks to be divided, and the mask pattern having the highest similarity with the block to be compared is selected. Pattern matching determination step,
A code assignment step for assigning a code according to the selected mask pattern;
A transfer step of transferring the codes in a predetermined order and timing according to preset transfer rule information;
A decoding step of receiving the code based on the reception rule information corresponding to the transfer rule information and restoring the signal level of each frequency band number component;
APD measurement method comprising: In the APD measurement method for measuring the APD by analyzing the frequency component of the signal to be measured,
A signal level acquisition step for logarithmically converting the signal level of each predetermined frequency band component of the measurement target signal acquired at a predetermined sampling period;
Create a two-dimensional map of the signal level for each frequency band component composed of the logarithmically transformed signal level with the level axis and the time axis divided based on the time interval of the sampling period, and correspond to the intersection position in the two-dimensional map A step of creating a two-dimensional map for dividing each block so as to include each area,
An average level value calculating step for calculating an average level value obtained by averaging the signal level of each area in the divided block;
A level including the average level value calculated by collating the calculated average level value with the encoding processing information associated with the code assigned to each level range when the range is divided for each predetermined level A level collation determination step of finding a range and outputting code information of the corresponding level range;
A code assignment step for assigning a code corresponding to the code information obtained in the level collation determination step;
A transfer step of transferring the codes in a predetermined order and timing according to preset transfer rule information;
A decoding step of receiving the code based on the reception rule information corresponding to the transfer rule information and restoring the signal level of each frequency band number component;
APD measurement method comprising:

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