JPH0823312A - Signal processing unit - Google Patents

Abstract

PURPOSE:To attain sure identification by analyzing a waveform of a pulse signal and identifying a source of a radio wave based on the result of analysis of the waveform and on the result of measurement of pulse width. CONSTITUTION:First-third level detection circuits 11-13 read a video pulse signal S1 stored in a buffer 5 and sequentially obtain the compared result to detect a reference level for pulse width measurement. First-third pulse width measurement circuits 14-16 obtain the result of comparison between the reference level and the video pulse signal S1 and measure a period when a signal level of the video pulse signal S1 rises as a pulse width of the video pulse signal S1 based on the comparison result and a sampling time of an A/D converter 4. A pulse width ratio measurement circuit 17 detects a ratio of pulse widths based on arithmetic processing. The characteristic of the video pulse signal S1 is grasped by using the ratio of pulse widths to identify the video pulse signal S1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing device for analyzing and analyzing a pulse signal coming from a radio wave source, and more particularly to a signal processing device for identifying a radio wave source from a waveform analysis result of the pulse signal. is there.

[0002]

2. Description of the Related Art FIG. 11 shows, for example, James Bao-
By Yan Tsui, DIGITALMICROWAV
E RECEIVES Theory and Co
FIG. 3 is a block diagram showing a conventional signal processing device disclosed in nc-epts (ARTECH HOUSE, INC. 1989, PP4-7) by taking a post-detection type digital receiver as an example.
In the figure, 1 is an antenna, 2 is a receiver, 3 is a detector,
Reference numeral 4 is an analog digital (A / D) converter, 5 is a buffer, 6 is a level detection circuit, 7 is a pulse width measurement circuit, 8 is an identification circuit, 9 is an identification database, and 10 is an identification result.

Next, the operation will be described. The pulse-modulated signal transmitted from the radio wave source is received by the antenna 1, amplified by the receiver 2, frequency-converted, and then detected by the wave detector 3 formed of a diode. As a result, as shown in FIG. The video pulse signal S1 is demodulated from this pulse modulation signal. The analog digital converter 4 converts the video pulse signal S1 into a digital signal at a predetermined sampling period, and the buffer 5 stores the digitalized video pulse signal S1.

The level detection circuit 6 detects the peak level H of the video pulse signal S1 by reading out the video pulse signal S1 accumulated in the buffer 5 and sequentially obtaining the comparison result, and the pulse is detected from the peak level H. Detect the reference level for width measurement. In this type of signal processing device, the reference level is 1/2 of the peak level H.
(That is, the level at which the instantaneous power of the video pulse signal S1 becomes 50 [%] (-3 [dB])), and the pulse width measurement result is It is constructed so that it does not change.

The pulse width measuring circuit 7 obtains a comparison result between the reference level and the video pulse signal S1, and based on the comparison result and the sampling time of the analog digital converter 4, the signal level of the video pulse signal S1 is determined as follows. The period from the rise to the fall from the reference level is measured as the pulse width PW of the video pulse signal S1.

In the identification database 9, the pulse width measurement result of each radio wave source measured in advance by the pulse width measuring circuit 7 is registered together with the name of each radio wave source, and the identification circuit 8 records the pulse of the video pulse signal S1. The width PW is compared with each pulse width measurement result of the identification database 9. Then, if the pulse width PW of the video pulse signal S1 substantially matches any of the registered pulse widths of the radio wave sources, the name of the radio wave source that matches is output as the identification result 10, but the matching radio wave source cannot be detected. In this case, the identification result is output as the identification result 10.

[0007]

Since the conventional signal processing apparatus is constructed and operates as described above, a radio wave source having a pulse width which is the same as or close to the pulse width which is the analysis result of the video pulse waveform is stored in the identification database. If a large number of them exist, there is a problem that they coincide with the plurality and it becomes impossible to identify the difference of the radio wave sources. Therefore, in the conventional apparatus, in such a case, it is necessary for the observer to further monitor the waveform of the video pulse signal S1 with an oscilloscope or the like to analyze the fine features of the pulse width and the pulse waveform.

The present invention has been made in order to solve the above problems, and it is possible to analyze a video pulse signal with high accuracy and to easily and easily even when there are a plurality of radio wave sources having the same or close pulse widths. An object of the present invention is to provide a signal processing device capable of surely identifying a radio wave source.

[0009]

A signal processing device according to the present invention is a signal processing device for identifying a radio wave source of a pulse signal on the basis of the pulse signal received by a predetermined receiver. A pulse width measuring means for measuring and outputting the pulse width measurement result; and means for analyzing the waveform shape of the pulse signal and outputting the waveform shape analysis result,
The feature is that the radio wave source is identified based on the pulse width measurement result and the waveform shape analysis result.

Further, in a signal processing device for identifying a radio wave source of a pulse signal on the basis of the pulse signal received by a predetermined receiver, the peak level of the pulse signal is detected and held at a constant ratio to the peak level. And a plurality of reference level setting means for detecting reference levels having different values, and a plurality of pulse width measuring means for measuring the pulse width of the pulse signal at each reference level and outputting each pulse width measurement result, Pulse width ratio measuring means for detecting the ratio of the pulse width measurement results and outputting the pulse width ratio measurement results, and identifying the radio wave source based on the pulse width ratio measurement results.

Further, in the signal processing device for identifying the radio wave source of the pulse signal based on the pulse signal received by the predetermined receiver, the peak level of the pulse signal is detected and held at a constant ratio to the peak level. And a plurality of reference level setting means for detecting reference levels having mutually different values, and a means for detecting the change rate of the pulse signal changing between the plurality of reference levels and outputting the change rate. It is characterized by identifying the radio wave source based on.

Further, in the signal processing device for identifying the radio wave source of the pulse signal based on the pulse signal received by the predetermined receiver, the peak level of the pulse signal is detected and held at a constant ratio to the peak level. The time constant of the pulse signal is detected and the time constant is output by detecting a plurality of reference level setting means for detecting the reference levels having different values and the time of the pulse signal required for the change between the reference levels. And a pulse time constant measuring means for identifying the radio wave source based on the time constant.

Further, in the signal processing device for identifying the radio wave source of the pulse signal based on the pulse signal received by the predetermined receiver, the peak level of the pulse signal is detected and held at a constant ratio to the peak level. A plurality of reference level setting means for detecting reference levels having different values, and between the plurality of reference levels, the pulse signal is linearly approximated, and the square error of the pulse signal with respect to the linearly approximated straight line is detected, A means for outputting a linear approximation result and a squared error is provided, and the radio wave source is identified based on the linear approximation result and the squared error.

Further, it is characterized by further comprising signal processing target data selecting means for selecting a rising or falling portion of the pulse signal as a pulse signal to be processed.

[0015]

In the signal processing device of the present invention, the waveform shape of the pulse signal is analyzed, and the radio wave source is identified based on the waveform shape analysis result and the pulse width measurement result. Even if there are a plurality of radio wave sources of pulse signals that are close to each other, different waveform shape analysis results can be obtained, which enables reliable identification.

Further, the pulse width is measured at a plurality of reference levels having different values, the pulse width ratio is detected from each pulse width measurement result, and the radio wave source is identified based on the resulting pulse width ratio measurement result. Therefore, even if there are a plurality of radio wave sources of pulse signals having the same or close pulse widths, it is possible to identify the radio wave sources based on different pulse width ratio measurement results.

Further, since the rate of change of the pulse signal changing between the reference levels having different values is detected and the radio wave source is identified based on this rate of change, pulse signals of the same pulse width or close to each other are detected. Even when there is a radio source,
It is possible to identify the radio wave source based on different rates of change.

Further, since the time constant of the pulse signal is detected and the radio wave source is identified based on this time constant, radio wave sources having the same pulse width or close pulse widths are radio wave based on different time constants. It is possible to identify the source.

Further, it is characterized in that the pulse signal is linearly approximated, a squared error of the pulse signal with respect to the straight line subjected to the linear approximation is detected, and the radio wave source is identified based on the linear approximation result and the squared error. Therefore, even for radio wave sources having the same or close pulse widths, it is possible to identify the radio wave source based on the linear approximation result and the square error.

By providing the signal processing target data selecting means for selecting the rising or falling part of the pulse signal as the pulse signal to be processed, it is possible to identify the radio wave source in the falling part in the same manner as above. Become.

[0021]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a first embodiment of the present invention.
In the figure, the same reference numerals as those in FIG. 11 indicate the same or corresponding parts, 11, 12, 13 are first, second and third level detection circuits respectively, and 14, 15, 16 are respectively first, second and second level detection circuits. 3 is a pulse width measurement circuit, 17 is a pulse width ratio measurement circuit, 18 is an identification circuit, 19 is an identification database, and 20 is an identification result.

Next, the operation will be described. The pulse-modulated signal sent from the radio wave source is detected by the detector 3 via the receiver 2 as in the conventional case, whereby the video pulse signal S1 as shown in FIG. 2 is demodulated from the pulse-modulated signal. The analog digital converter 4 converts the video pulse signal S1 into a digital signal at a predetermined sampling period, and the buffer 5 stores the digitalized video pulse signal S1.

First to third level detection circuits 11 to 12
Detects the peak level H of the video pulse signal S1 by reading the video pulse signal S1 accumulated in the buffer 5 and sequentially obtaining comparison results.
From the reference levels L1 to L3 for pulse width measurement. Then, in the first level detection circuit 11, the level of about 89% of the peak level H (that is, the level of −0.5 [dB] of the peak level H) is selected as the reference level L1, and the second level detection circuit 11 is selected. In 12, the level of the peak level H is about 50% (that is,
3 [dB] level) is selected as the reference level L2, and the third level detection circuit 13 sets the peak level H at about 28.
[%] Level (that is, −5.5 [d of peak level H
B] level) is selected as the reference level L3.

First to third pulse width measuring circuits 14 to 16
Respectively obtain the comparison result between the reference levels L1 to L3 and the video pulse signal S1, and based on the comparison result and the sampling time of the analog digital converter 4, the signal level of the video pulse signal S1 becomes the reference level L1.
˜L3 is measured as the pulse widths PW1 to PW3 of the video pulse signal S1. And the first one
Since the third level detection circuits 11 to 13 set the reference levels L1 to L3 with the peak level H of the video pulse signal S1 as a reference, respectively, even when the signal level of the pulse modulation signal changes. -In the third pulse width measurement circuits 14 to 16, the pulse width measurement results can be held constant, respectively, whereby the uniformity of the pulse width measurement results is ensured, and the data and the pulse registered in the identification database 19 are secured. It is possible to ensure consistency with the width measurement result.

The pulse width ratio measuring circuit 17 detects the ratio between the pulse widths PW1 to PW3 based on the pulse width measurement results output from the first to third pulse width measuring circuits 14 to 16. The waveform analysis result of the video pulse signal S1 is detected. That is, the pulse width ratio measuring circuit 17 performs the arithmetic processing to obtain (pulse width PW1 / pulse width PW2):
The pulse width ratio represented by 1: (pulse width PW3 / pulse width PW2) is detected. The ratio of the pulse widths thus represented is the first and third pulse widths PW1 and PW3.
Is represented by being normalized by the second pulse width PW2, and represents in detail the pulse width characteristics of the video pulse signal S1 and the characteristics of the pulse rising and falling portions together with the second pulse width PW2. become. Thus, the characteristics of the video pulse signal S1 are grasped by using the pulse width ratio, and the video pulse signal S1 is identified by using the pulse width ratio together with the pulse width PW2.

Further, in the identification database 19 in this embodiment, the pulse width ratio measurement result of each radio wave source previously measured by the pulse width ratio measuring circuit 17 and the second pulse width PW2 are registered together with the name of each radio wave source. Therefore, the discrimination circuit 18 collates the content of the discrimination database 19 with the measurement result, and outputs the collation result as the discrimination result 20.
That is, the identification circuit 18 uses the second pulse width measurement circuit 15
The identification database 19 is searched on the basis of the second pulse width PW2 detected by the pulse width ratio measurement circuit 17 and the pulse width ratio measurement result measured by the pulse width ratio measurement circuit 17, and the second pulse width PW2 and the pulse width in the identification database 19 are searched. When the ratio measurement results match, the name of the matching radio source is identified.
Output as It should be noted that, when the matching radio wave source cannot be detected, the identification result is output from the identification result 20 as in the case of the conventional device.

Therefore, even if there are a plurality of radio wave sources having the same pulse width or close to each other, the difference between these radio wave sources can be detected in the pulse width ratio measurement result, and even in such a case, the radio wave can be easily and reliably emitted. Source differences can be identified.

In the first embodiment, the second pulse width P
The radio wave source is identified on the basis of W2 and the pulse width ratio measurement result. However, instead of the second pulse width PW2 or in addition to the second pulse width PW2, the first
Alternatively, the radio wave source may be identified based on the third pulse width PW1 and / or PW3, or the pulse width ratio may be detected based on the first or third pulse width PW1 or PW3.

Example 2. 3 is a block diagram showing a second embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 designate the same or corresponding portions, and 21 is a pulse rising slope measuring circuit.

Next, the operation will be described. The pulse rising slope measuring circuit 21 detects the rate of change of the video pulse signal S1 that changes between the reference levels L1 and L2 detected by the level detecting circuits 11 and 12, and thereby detects the rising slope of the video pulse signal S1. That is, in the pulse rising slope measuring circuit 21, the first and second reference levels L
1 and L2 and the comparison result of the video pulse signal S1 are obtained, and based on the comparison result and the sampling time of the analog digital converter 4, as shown in FIG. After the rise from the level L2, the time Δt until the rise to the first reference level L1 is detected.

Further, in the pulse rising slope measuring circuit 21,
From the level ratio of the first and second reference levels L1 and L2 to the peak level H that is the reference when setting these reference levels L1 and L2 (that is, respectively-
3 [dB] and −0.5 [dB]), the difference in level ratio is detected, and the difference in level ratio is divided by the time Δt to detect the rising slope θ of the video pulse signal S1.

Further, in the pulse rising slope measuring circuit 21, in addition to the rising slope θ, the video pulse signal S1 is set with the second reference level as a reference, as in the second pulse width measuring circuit 15 described in the first embodiment. Pulse width P
W2 is detected, and the rising slope θ and this pulse width PW2 are output to the discrimination circuit 18. As a result, in the second embodiment, instead of the pulse width ratio of the first embodiment, the rising slope θ
Is measured, the waveform of the video pulse signal S1 is analyzed by the pulse width and the rising slope θ, and the radio wave source is identified.

In the identification database 19, the rising gradient θ and the pulse width PW2 of each radio wave source collected in advance are registered together with the name of each radio wave source, and the identification circuit 18 shows the measurement result of the pulse rise gradient measuring circuit 21. Based on this, the identification database 19 is searched and the identification result is output.
As described above, in the second embodiment, the video pulse signal S1
Using the rising slope θ that can identify the waveform shape of
It becomes possible to easily and surely identify the radio wave source based on the rising gradient θ. Further, this rising slope θ detects the difference between the level ratios of the first and second reference levels L1 and L2 with respect to the peak level H that is the reference when setting these reference levels L1 and L2. By performing the measurement, the constant value can be held even if the signal level of the pulse modulation signal changes, and thus the radio wave source can be correctly identified.

Example 3. 5 is a block diagram showing a third embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding portions, and 22 denotes a pulse rise time constant measuring circuit.

Next, the operation of the third embodiment will be described. The pulse rise time constant measuring circuit 22 obtains a comparison result between the reference levels L1 and L2 and the video pulse signal S1, and based on the comparison result and the sampling time of the analog digital converter 4, as shown in FIG. Pulse signal S
Time τ from when the signal level of 1 rises from the second reference level L2 to when it rises to the first reference level L1
To detect.

As a result, in this embodiment, this time τ is detected as the rising time constant of the video pulse signal S1 and the waveform of the video pulse signal S1 is changed by this rising time constant instead of the pulse width ratio of the above-described first embodiment. Analyze and identify radio sources. Further, the pulse rise time constant measuring circuit 22 adds the video pulse signal S1 in addition to the rise time constant τ with the second reference level as a reference, similarly to the second pulse width measuring circuit 15 described in the first embodiment. Pulse width PW2
Is detected and the rising time constant τ and this pulse width PW2 are output to the discrimination circuit 18.

In the identification database 19, the rise time constant τ for each radio wave source and the pulse width PW2 which have been collected in advance are registered together with the names of the radio wave sources. In the identification circuit 18, the measurement of the pulse rise time constant measuring circuit 22 is performed. Based on the results
The identification database 19 is searched and the identification result is output. That is, in the third embodiment, the rising time constant τ that represents the waveform shape of the video pulse signal S1 in detail is used, and the radio wave source can be identified easily and reliably based on the rising time constant τ. Further, the rising time constant τ can be detected as a constant value with respect to the change in the signal level of the pulse modulation signal by measuring using the reference levels L1 and L2 normalized by the peak level, and thus the radio wave can be correctly detected. The source can be identified.

Example 4. 7 is a block diagram showing a third embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding portions, 23 denotes a square error calculation circuit, 24
Is a linear approximation gradient, and 25 is a squared error.

Next, the operation of the fourth embodiment will be described. The square error calculation circuit 23 obtains a comparison result between the reference levels L1 and L2 and the video pulse signal S1, and based on the comparison result and the sampling time of the analog digital converter 4, as shown in FIG. The time difference between the rise of the signal level of the signal S1 from the second reference level L2 and the rise of the signal S1 to the first reference level L1 is detected.

Next, in the square error calculation circuit 23, as shown in FIG. 8, in the same manner as the pulse rising slope measuring circuit 21 in the second embodiment, the first and second reference levels L1 and The level ratio difference is detected from the level ratio of L2, and the level ratio difference is calculated as time Δ.
The rising slope of the video pulse signal S1 is detected by dividing by t, whereby the first and second reference levels L1 and L2 are detected.
The inclination of the straight line connecting the two is normalized by the peak level H and detected.

Next, in the square error calculation circuit 23, the first error
And the second reference levels L1 and L2 and the timing at which the video pulse signal S1 crosses the reference levels L1 and L2 are used as a reference to perform linear interpolation calculation processing so as to correspond to each sampling point of the video pulse signal S1. A straight line L connecting the first and second reference levels L1 and L2
Detect the above interpolation calculation value.

Next, the square error calculation circuit 23 sequentially performs a subtraction process between the interpolation calculation value and the corresponding sampling value of the video pulse signal S1 to detect the sum of squares of the subtraction values. Further, the squared error calculation circuit 23 divides this sum of squares by the squared value of the peak level H, whereby the straight line L connecting the first and second reference levels L1 and L2,
The squared error of the video pulse signal S1 with respect to the straight line L is normalized by the peak level H and detected.

Next, in the square error calculation circuit 23, the first embodiment
Similarly to the second pulse width measuring circuit 15 described above, the pulse width PW2 of the video pulse signal S1 is detected with the second reference level L2 as a reference, and the slope and square error of the normalized straight line L and this pulse are detected. The width PW2 is output to the identification circuit 18. As a result, in the fourth embodiment, the waveform of the video pulse signal S1 is analyzed by the slope of the straight line L and the squared error that are normalized in place of the pulse width ratio of the first embodiment, and the radio wave source is identified.

In the identification database 19, the pulse width, the gradient of the normalized straight line L, and the squared error, which are collected in advance for each radio wave source, are registered together with the name of each radio wave source. In the identification circuit 18, the squared error calculation circuit is registered. Based on the measurement result of 23, the identification database 19 is searched and the identification result is output.

As described above, in the fourth embodiment, the slope and the square error of the normalized straight line L which represents the waveform shape of the video pulse signal S1 in detail are used, and the slope and the square error of the normalized straight line L are used. It becomes possible to easily and surely identify the radio wave source with reference to. Further, the normalized slope and squared error of the straight line L can hold a constant value even if the signal level of the pulse modulation signal changes, whereby the radio wave source can be correctly identified.

Example 5. FIG. 9 is a block diagram showing a fifth embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, 26 is a signal processing target data selection circuit, and 27 is a signal processing circuit.

Next, the operation of the fifth embodiment will be described. As shown in FIG. 10, the signal processing target data selection circuit 26 sequentially detects the signal level of the video pulse signal S1 when the digitalized video pulse signal S1 is stored in the buffer 5, and this video is preliminarily detected. Rising and falling portions 30 and 31 of the pulse signal S1
To detect. Further, the signal processing target data selection circuit 26 selectively reads and outputs the rising and falling portions 30 and 31 of the video pulse signal S1 from the buffer 5 based on the signal level detection result.

In the signal processing circuit 27, based on the video pulse signal S1 selectively output from the signal processing target data selecting circuit 26, the level detecting circuits 11 to 13 and the pulse width measuring circuit 14 of the above-described first embodiment. ˜16, the pulse width ratio measuring circuit 17, or the level detecting circuits 11 and 12 and the pulse rising slope measuring circuit 21 of the second embodiment, or the level detecting circuits 11 and 12 and the pulse rising time constant of the third embodiment. The processing of the circuit 22, the level detection circuits 11 and 12 and the squared error calculation circuit 23 of the fourth embodiment described above is executed, and the identification circuit 18 and the identification database 19 perform identification processing corresponding to the output of the signal processing circuit 27. The radio source is identified.

In the fifth embodiment, as described above, the signal processing circuit 27 can process only a part of the video pulse signal S1 stored in the buffer 5 to obtain the waveform analysis result. The time required can be shortened. In particular, if the pulse width of the video pulse signal S1 becomes large, a wasteful data processing time is required, but in the fifth embodiment, this wasteful processing time can be shortened.

In the above-mentioned Embodiments 2 to 4, the waveform of the rising edge of the video pulse signal is analyzed, but the signal processing target for selecting the rising and / or falling portion of the pulse as the pulse signal to be processed. A data selecting means (not shown) may be provided to analyze the waveform of the trailing edge of the video pulse signal.

Further, in the above-mentioned embodiment, the identification database 19 is supposed to register the measurement results collected in advance. However, if the collection in advance is difficult, the previous measurement results may be registered. In this case, the identification database 19 is updated every time measurement is performed, and the name of the radio wave source is unknown, but it is possible to identify whether or not the radio wave source to be measured this time is the same as the radio wave source to be previously measured. become.

In the above embodiment, the level is about 89% of the peak level H and about 50% of the peak level H, respectively.
The level of [%] and the level of about 28 [%] of the peak level H are selected as the first to third reference levels L1 to L3, but the first to third reference levels L1 to L3.
Needless to say, any value can be selected as long as it is a relative value of a constant level having a different value with respect to the peak level H.

In the fourth embodiment, the video pulse signal is linearly approximated from the first and second reference levels, but instead of this, the video pulse signal S1 between the first and second reference levels is used. May be directly approximated by the least squares method. Further, as the linear approximation method, various linear approximation methods can be applied instead of them.

Further, in the above embodiment, the waveform analysis of the video pulse signal is performed based on the pulse width ratio, the rate of change of the pulse rise, the time constant of the pulse rise, and the linear approximation result of the rise, respectively. It goes without saying that various waveform analysis methods can be widely applied.

[0055]

As described above, the signal processing apparatus of the present invention analyzes the waveform shape of a pulse signal and identifies the radio wave source based on the waveform shape analysis result and the pulse width measurement result. Therefore, even if there are a plurality of pulse signal radio sources having the same pulse width or close pulse widths, the pulse signal radio sources can be identified easily and reliably.

Further, the pulse width is measured at a plurality of reference levels having different values, the ratio of the pulse widths is detected, and the radio wave source is identified based on the pulse width ratio measurement result obtained as a result. Even when there are a plurality of radio wave sources of pulse signals having the same or close pulse widths, the radio wave sources can be reliably identified.

Further, since the rate of change of the pulse signal is detected and the radio wave source is identified based on this rate of change, even when there are radio wave sources of pulse signals having the same pulse width or close pulse widths, the radio wave source is surely detected. The radio wave source can be identified.

Further, since the radio wave sources are identified based on the time constant of the pulse signal, it is possible to surely identify the radio wave sources having the same or close pulse widths.

In addition to linearly approximating the pulse signal,
Since the square error of the pulse signal with respect to the approximated straight line is detected and the radio wave source is identified based on the straight line approximation result and the squared error, the radio wave sources having the same pulse width or close proximity can be reliably identified. can do.

Further, even if the above-mentioned identifying means is used to identify the trailing edge of the pulse signal, the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining the configuration of a first embodiment of the present invention.

FIG. 2 is a signal waveform diagram for explaining the operation of the first embodiment.

FIG. 3 is a block diagram for explaining the configuration of the second embodiment of the present invention.

FIG. 4 is a signal waveform diagram for explaining the operation of the second embodiment.

FIG. 5 is a block diagram for explaining the configuration of the third embodiment of the present invention.

FIG. 6 is a signal waveform diagram for explaining the operation of the third embodiment.

FIG. 7 is a block diagram for explaining the configuration of a fourth embodiment of the present invention.

FIG. 8 is a signal waveform diagram for explaining the operation of the fourth embodiment.

FIG. 9 is a block diagram for explaining the configuration of the fifth embodiment of the present invention.

FIG. 10 is a signal waveform diagram for explaining the operation of the fifth embodiment.

FIG. 11 is a block diagram showing a conventional signal processing device of this type.

FIG. 12 is a signal waveform diagram for explaining the operation of the conventional signal processing device.

[Explanation of symbols]

1 antenna, 2 receiver, 3 detector, 4 analog digital converter, 5 buffer, 6, 11, 12,
13 level detection circuit, 7, 14, 15, 16 pulse width measurement circuit, 8, 18 identification circuit, 9, 19 identification database, 10, 20 identification result, 17 pulse width ratio measurement circuit, 21 pulse rising slope measurement circuit, 22 Pulse rise time constant measurement circuit, 23 Square error calculation circuit, 2
6 signal processing target data selection circuit, 27 signal processing circuit.

Claims (6)

[Claims] 1. A signal processing device for identifying a radio wave source of a pulse signal with reference to a pulse signal received by a predetermined receiver, wherein the pulse width of the pulse signal is measured to output a pulse width measurement result. Signal processing for measuring the waveform shape of the pulse signal and outputting a waveform shape analysis result, and performing signal processing for identifying the radio wave source based on the pulse width measurement result and the waveform shape analysis result. apparatus. 2. A signal processing device for identifying a radio wave source of a pulse signal based on a pulse signal received by a predetermined receiver, detects a peak level of the pulse signal, and outputs a constant ratio to the peak level. And a plurality of reference level setting means for detecting reference levels having different values, and a plurality of pulse width measurements for measuring the pulse width of the pulse signal at each of the reference levels and outputting each pulse width measurement result. Means and pulse width ratio measuring means for detecting a ratio of the plurality of pulse width measurement results and outputting a pulse width ratio measurement result, and signal processing for identifying the radio wave source based on the pulse width ratio measurement result. apparatus. 3. A signal processing device for identifying a radio wave source of a pulse signal based on a pulse signal received by a predetermined receiver, detects a peak level of the pulse signal, and detects a constant level with respect to the peak level. A plurality of reference level setting means for holding reference ratios and detecting different reference levels, and a means for detecting a change rate of the pulse signal changing between the plurality of reference levels and outputting the change rate. And a signal processing device that identifies the radio wave source based on the change rate. 4. A signal processing device for identifying the radio wave source of the pulse signal based on the pulse signal received by a predetermined receiver, detects a peak level of the pulse signal, and detects a constant level with respect to the peak level. The time constant of the pulse signal is detected by detecting a plurality of reference level setting means for holding reference ratios which are held in a ratio and have different values, and the time of the pulse signal required for the change between the reference levels. And a pulse time constant measuring means for outputting the time constant, the signal processing device for identifying the radio wave source based on the time constant. 5. A signal processing device for identifying a radio wave source of a pulse signal based on a pulse signal received by a predetermined receiver, detects a peak level of the pulse signal, and detects a constant level with respect to the peak level. A plurality of reference level setting means for holding reference ratios and detecting different reference levels, and linearly approximating the pulse signal between the plurality of reference levels, and squaring the pulse signal with respect to the linearly approximated straight line. A signal processing device, comprising means for detecting an error and outputting the linear approximation result and the squared error, and identifying the radio wave source based on the linear approximation result and the squared error. 6. The signal processing device comprises signal processing target data selecting means for selecting rising and / or falling portions of the pulse signal as pulse signals to be processed. ~ The signal processing device according to item 5.