JPH10268034A - Pulse signal receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separately detect a reception pulse signal for each radio wave transmission source effectively even if a pulse signal is received from a plurality of radio wave transmission sources simultaneously or even if a pulse train with an irregular interval of arrival of the pulse signal is received. SOLUTION: A pulse signal being received via an input antenna 1 is converted to a specific IF frequency by a frequency conversion circuit 2, and the amplitude value of a reception pulse signal being converted to the specific IF frequency is converted from analog to digital in time series at a frequency that is at least five times faster than the IF frequency by a high-speed A/D conversion circuit 3. Time-series envelope curve data are detected for each reception pulse signal based on the amplitude value of the reception pulse signal being converted from analog to digital via a DRFM(digital RF memory) by an envelope data detection circuit 6, and the time-series envelope data are correlated via an envelope data storage memory 8 by a cross-correlation circuit 9, thus judging that the signals are transmitted from a same source when the degree of correlation is equal to or more than a specific value and storing the data in a pulse data memory 10 for each transmission source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a pulse signal receiving apparatus which receives a pulse signal coming from a radio wave transmission source such as a high-frequency radar, and classifies the pulse signal for each radio wave transmission source.

[0002]

2. Description of the Related Art FIG. 22 is a block diagram of a conventional pulse signal receiving device. In the figure, 1 is an input antenna, 2 is a frequency conversion circuit for converting an input wave to an intermediate frequency (IF) frequency, 30 is an analog frequency measurement circuit such as an IFM, and 31 is a video PW calculation circuit for calculating a pulse width from a video signal. , 32 are pulse data memories for storing pulse data composed of pulse frequency and pulse width for each pulse, 3
3 is an F histogram generation circuit for classifying pulse data based on frequency; 34 is an F histogram storage memory;
Is a TOI classification circuit that creates a distribution of pulse-to-pulse intervals (TOI) for each section classified by frequency, 36 is a memory for storing the TOI classification result, and 37 is a signal indicating whether or not one radio wave transmission source is based on the TOI classification result. Radio wave source judgment circuit to judge, 3
Reference numeral 8 denotes a radio wave source data storage memory.

Next, the operation will be described. The pulse signal input to the input antenna 1 is converted into a frequency in an intermediate frequency (IF) band by the frequency conversion circuit 2, and then the frequency is calculated by the analog frequency measurement circuit 30.
On the other hand, the video signal is detected by the video PW calculation circuit 31 as the pulse width of a point at which a certain level is lowered from the maximum amplitude level. The pulse data having these frequencies and pulse widths is output to the pulse data memory 32 for each received pulse signal.

Next, an F histogram generating circuit 33 generates a frequency frequency distribution based on the pulse data stored in the pulse data memory 32 and stores the frequency frequency distribution in an F histogram storing memory 34, and the frequency frequency distribution is stored in a TOI classifying circuit 35. Send out.

[0005] The TOI classification circuit 35 creates a histogram of pulse arrival intervals based on the pulse groups classified by the frequency frequency distribution, and stores the TOI classification result storage memory 3.
6 and sent to the radio wave transmission source determination circuit 37.

The radio wave source determining circuit 37 determines whether or not the pulse arrival interval is constant, and if the pulse arrival interval is constant, outputs the signal to the radio source data storage memory 38 as a radio source. I have to.

[0007]

However, the conventional pulse signal receiving apparatus, when classifying a plurality of received pulses for each same source, classifies the video signal based on a quantized pulse width and its frequency value. Therefore, if received pulse signals having frequencies close to each other are simultaneously received for each radio wave transmission source, it is not possible to classify the received pulse signals into pulse trains corresponding to the transmission sources, and to perform PRI (Pulse Repetitional Interpolation).
val) could not be determined in the case of the same source having a pulse train that fluctuated for each pulse. For this reason, when a radio wave pulse arrives in such a situation, there is a problem that a signal sequence of the incoming radio pulse cannot be detected.

The present invention has been made to solve such a problem, and classifies a pulse train for each transmission source based on the waveform of the arriving pulse instead of the pulse width and frequency value of the arriving pulse. This makes it possible to accurately and efficiently transmit a plurality of pulse signals to each source even when a pulse signal is simultaneously received from a plurality of radio wave sources such as a high-frequency radar or a pulse train in which the arrival intervals of the pulse signals are not constant. It is an object of the present invention to provide a pulse signal receiving device capable of separately detecting a pulse signal.

[0009]

In order to achieve the above object, a pulse signal receiving apparatus according to the present invention receives pulse signals respectively transmitted from a plurality of radio wave transmission sources, and transmits a received pulse signal to the radio wave transmission source. A pulse signal receiving device configured to classify the received pulse signal into a predetermined frequency by the frequency converting means; High-speed A / D conversion means for performing A / D conversion in a time series with a frequency; and characteristic data for each reception pulse signal based on the reception pulse signals which are A / D converted in a time series by the high-speed A / D conversion means. The feature data detecting means to be detected is compared with the feature data for each of the received pulse signals within a predetermined time detected by the feature data detecting means. The received pulse signal based on the comparison result is to anda classification means for classifying for each of the radio sources.

In particular, according to the present invention, the characteristic data detecting means detects time-series envelope data for each received pulse signal as characteristic data, and the classifying means detects reception time within a predetermined time detected by the characteristic data detecting means. The cross-correlation between the time-series envelope data for each pulse signal is calculated to calculate the degree of correlation, and the received pulses whose correlation is equal to or greater than a predetermined value are determined as pulse signals from the same source, and the received pulse signal is determined. Classification is performed for each radio wave transmission source.

In the present invention, the characteristic data detecting means detects a rise time for each received pulse signal as characteristic data, and the classification means calculates a rise time for each received pulse signal detected by the characteristic data detecting means. Calculate and compare the rise times of the received pulse signals for each received pulse signal within a predetermined time, and determine that the received pulses whose difference between the rise times is equal to or less than a predetermined value are pulse signals from the same transmission source, and Are classified for each radio wave transmission source.

In the present invention, the characteristic data detecting means detects a fall time for each received pulse signal as characteristic data, and the classifying means detects a falling time for each received pulse signal detected by the characteristic data detecting means. Calculate the fall time and compare the fall times of each received pulse signal within the predetermined time, and determine that the received pulses whose difference between the fall times is equal to or less than the predetermined value are pulse signals from the same source. The received pulse signals are classified for each radio wave transmission source.

Further, in the following invention, in the pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave transmitting sources and classifies the received pulse signals for each of the radio wave transmitting sources, Frequency converting means for converting the pulse signal into a predetermined frequency; and high-speed A / D converting the amplitude value of the received pulse signal converted into the predetermined frequency by the frequency converting means into a time series at a frequency higher than the predetermined frequency. A cross-correlation is calculated between the time-series sine-wave data of the received pulse signal within a predetermined time, which is A / D-converted in a time series by the D-conversion means and the high-speed A / D conversion means, and a correlation degree is calculated. Classifying means for judging received pulses whose degrees are equal to or greater than a predetermined value as pulse signals from the same transmission source and classifying the reception signals for each radio wave transmission source.

Further, in these inventions, the high speed A /
Pulse data calculating means for calculating pulse data for each of the received pulse signals based on the received pulse signals which have been A / D converted in time series by the D converting means, characteristic data for each of the received pulse signals detected by the characteristic data detecting means, A data storage means for each transmission source for storing the pulse data for each reception pulse signal calculated by the pulse data calculation means for each radio wave transmission source based on the classification by the classification means.

Further, in these inventions, the detected source data storage means for storing at least the characteristic data of the detected radio source and its detection time, and the characteristic of the new radio source in the source-specific data storage means. When the data is stored, it is determined whether or not the characteristic data is stored in the detected source data storage unit. If the characteristic data is already stored in the detected source data storage unit, Updates the determination time as the detection time of the radio wave transmission source of the characteristic data. If the characteristic data is not stored in the detected transmission source data storage unit, the characteristic data and the determination time are updated. Detecting source data registering means for newly storing in the detected source data storing means.

Further, according to these inventions, an identification table in which the name and its characteristic data are registered in advance for each radio wave source to be identified, an identification result storage means for storing the identification result, and a detected source Each time characteristic data of a new radio wave transmission source is stored in the data storage means, it is determined whether or not the characteristic data is stored in the identification table in advance, and the characteristic data is stored in the identification table in advance. And a detected source identification means for storing the name of the radio source in the identification result storage means.

Further, in the following invention, in the pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave sources and classifies the received pulse signals for each of the radio wave sources, Frequency conversion means for converting a pulse signal into a predetermined frequency, and high-speed A / D conversion means for performing time-series A / D conversion of a received pulse signal converted to a predetermined frequency by the frequency conversion means at a frequency higher than the predetermined frequency Characteristic data detecting means for detecting characteristic data for each received pulse signal based on the received pulse signal which has been A / D converted in time series by the high-speed A / D converting means; An identification table in which pulse signal feature data is registered in advance,
It is determined whether or not the characteristic data of the received pulse signal detected by the characteristic data detecting means is registered in the identification table in advance, and the characteristic data of the received pulse signal is registered in the identification table in advance. only,
A filter means for passing the characteristic data, and a data storage means for each transmission source for storing the characteristic data passing through the filter means for each radio wave transmission source.

In the present invention, the characteristic data detecting means detects time-series envelope data for each received pulse signal as characteristic data, and the identification table includes, for each radio wave source, at least the characteristic data of the received pulse signal. The time-series envelope data is registered in advance, and the filter means includes:
When the correlation between the time-series envelope data of the received pulse signal detected by the feature data detecting means and each of the time-series envelope data registered in advance in the identification table is greater than a predetermined value. Only the time-series envelope data is passed and stored in the data storage means for each radio wave source.

In the present invention, the characteristic data detecting means detects a rise time for each reception pulse signal as characteristic data, and the identification table stores, for each radio wave transmission source, at least the rise time as characteristic data of the reception pulse signal. The data is registered in advance, and the filter means compares the rise time data of the received pulse signal detected by the characteristic data detection means with each rise time data registered in advance in the identification table to obtain a difference, and obtains a predetermined value. Only when there is the following difference, the rise time is passed and each radio wave transmission source is stored in the data storage means for each radio wave transmission source.

Further, in the present invention, the characteristic data detecting means detects a fall time for each reception pulse signal as characteristic data, and the identification table stores, for each radio wave transmission source, at least the rising time as characteristic data of the reception pulse signal. The fall time data is registered in advance, and the filter unit compares the fall time data of the reception pulse signal detected by the feature data detection unit with each fall time data registered in the identification table in advance, and determines a difference. Only when there is a difference that is smaller than or equal to a predetermined value, the fall time is passed and stored in the data storage means for each radio wave source.

According to the present invention, in the pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave transmitting sources and classifies the received pulse signals for each of the radio wave transmitting sources, Frequency conversion means for converting a signal into a predetermined frequency, and high-speed A / D conversion means for performing time-series A / D conversion of the received pulse signal converted to a predetermined frequency by the frequency conversion means at a frequency higher than the predetermined frequency. An identification table in which at least time-series sine wave data of the received signal is registered in advance for each radio wave transmission source, and a time series of each received pulse signal A / D-converted in time series by the high-speed A / D converter. The cross-correlation is performed to determine whether the sine wave data is registered in the identification table in advance, and the time-series sine wave data of the received pulse signal is Only when registered in another table in advance, a filter means for passing the time series envelope data, and a s data storage means for each transmission source for storing the time series sine wave data passing through the filter means for each radio wave transmission source. , Is provided.

In the above invention, the high-speed A / D conversion means converts the received pulse signal, which has been converted to a predetermined frequency by the frequency conversion means, into a time series at a frequency five times or more higher than the predetermined frequency. Is what you do.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a pulse signal receiving device according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration of a pulse signal receiving apparatus according to Embodiment 1 of the present invention. In FIG. 1, 1 is an input antenna for receiving a pulse signal, 2 is a frequency conversion circuit for converting an input wave into an intermediate frequency (IF) frequency detected by the present device, and 3 is a frequency conversion circuit 2 which is a detection frequency of the present device.
The high-speed A / D converter measures the amplitude value of the received pulse signal converted to the IF frequency at a high-speed interval exceeding about 2 GHz, which is five times or more the intermediate frequency (IF) frequency to be converted, and A / D-converts the digital signal to digital. A D conversion circuit 4 is a digital RF memory (DRFM) that stores the time-series sine wave data of the A / D converted as a digital value every predetermined time in a time series, and 5 is a digital RF memory (DRFM) 4
Is a frequency calculating circuit that calculates the frequency value of the received pulse signal from the digital time-series IF sine wave data stored in.

Reference numeral 6 denotes an envelope data detection circuit for detecting time-series envelope data indicating an envelope shape as characteristic data from the time-series IF sine wave data. Reference numeral 7 denotes an input pulse width (PW) from the time-series envelope data. ), 8 is an envelope data storage memory for storing time-sequence envelope data for each reception pulse signal at predetermined time intervals, and 9 is a comparison of time-series envelope data for each reception pulse signal. A cross-correlation circuit as classification means for judging a received pulse signal having a correlation degree between time-series envelope data that is equal to or greater than a specified value from the same radio wave transmission source; A source-specific data storage memory for storing pulse data and time-sequence envelope data of the reception pulse signal for the above-mentioned predetermined time for each of the same radio wave transmission sources based on the judgment output. A buffer memory for temporarily storing up correlation determined pulse data consisting calculated the predetermined time of the frequency value and the pulse width by the circuit 5 and PW calculation circuit 7.

Next, the operation of the pulse signal receiving apparatus according to the first embodiment will be described. First, the signal waveform of a pulse signal of a radar or the like is a sine wave as shown in FIG.
The frequency of the pulse signal is converted by the frequency conversion circuit 2 into a constant intermediate frequency (IF) frequency detected by the present apparatus.

Next, the high-speed A / D conversion circuit 3 performs digital A / D conversion to the IF frequency at a high-speed interval exceeding about 2 GHz which is five times or more the IF frequency and converted by the frequency conversion circuit 2, and receives the signal. The amplitude value of the pulse signal at minute time intervals is measured.

At this time, the amplitude value of the sine wave as shown in FIG. 2 is measured at intervals sufficiently shorter than the period of the sine wave, ie, the reciprocal of the IF frequency, and the amplitude value data is digitally expressed in the form of (tn, Pn). The data is stored in an RF memory (DRFM) 4 in time series. Note that tn indicates time, and Pn indicates the amplitude value at that time tn.

Then, the frequency calculation circuit 5 calculates the digital R
The frequency of the pulse signal is calculated based on the time-series IF sine wave data (tn, Pn) stored in the F memory (DRFM) 4 and transmitted to the buffer memory 11 and the envelope data detection circuit 6. The buffer memory 11 stores the frequency of the pulse signal.

Here, the calculation method of the frequency calculation circuit 5 will be described. As shown in FIG. 3, among the data input in time series, the amplitude is set to a predetermined threshold level (Pth).
(Tb =) before the specified time from the time (ts)
From the measured value (ts−Pb) of (ts−specified value), after the amplitude exceeds Pth, the absolute value of the amplitude becomes smaller than the predetermined threshold level (Pth), and the state that is smaller than the predetermined threshold level (Pth) is specified. The frequency is calculated by performing the Fourier transform until the time equal to or longer than the value time, that is, from time tb to time te in FIG. Note that the Fourier transform is a known transform, and a description thereof will be omitted.

The envelope data detection circuit 6 calculates time-series envelope data based on the frequency data of the pulse signal from the frequency calculation circuit 5, and calculates a pulse width (PW) calculation circuit 7 and an envelope data storage. Output to the memory 8.

Here, the method of calculating the time-series envelope data by the envelope data detecting circuit 6 will be briefly described. The period Tω of the sine wave calculated by the frequency calculating circuit 5, that is, the reciprocal of the frequency of the sine wave is input. Then, as shown in FIG. 4, for the time-series time-series sine wave data, for each time (t0, t1,.
Time series sine wave data (t0, P0) in ω / 2 section
-(Te, Pe) is selected as the time-series envelope data at the time, and the time-series sine wave data selected in the time-series is converted to the time-series envelope data (t0, H0)-(t
e, He) to calculate the envelope data.

Then, the pulse width (PW) calculation circuit 7
From the time-series envelope data (t0, H0) to (te, He) calculated by the envelope data detection circuit 6, H at which the maximum amplitude is obtained
max is extracted, and the value Hi of the time-series envelope data is Hi> (H
(max-specified value), the time section of the time-series envelope data value Hi is calculated, and this time section is defined as the pulse width. Then, Tpw is output as a pulse width as shown in FIG.

In this manner, the frequency data and the pulse data, which are the pulse width data, of each received pulse signal received within the predetermined time calculated by the frequency calculation circuit 5 and the pulse width (PW) calculation circuit 7 are buffered. While stored in the memory 11, the time-series envelope data (t0, H0) to (te, He) for each reception pulse signal received within a predetermined time detected by the envelope data detection circuit 6 are envelope data. It is stored in the storage memory 8.

After a lapse of a predetermined time, that is, pulse data composed of frequency data and pulse width data for each received pulse signal received within a predetermined time, and time-sequence envelope data are stored in the buffer memory 11 or the envelope data, respectively. After being stored in the storage memory 8, the cross-correlation circuit 9
Are the time-series envelope data (t0, H0) to (te, H) of each received pulse signal stored in the envelope data storage memory 8.
e) is read out, and the degree of correlation is calculated by taking a cross-correlation between the read-out time-series envelope data. The correlation degree is a known algorithm for calculating the degree of correlation between discrete data functions, and the description of the cross-correlation algorithm is omitted here.

When the cross-correlation circuit 9 calculates the degree of correlation between all the received pulse signals input within a predetermined time,
It is determined whether or not there is a set of reception pulse signals having a correlation value equal to or greater than a specified value. Assuming that they are from the same source, buffer memory 1
The frequency data and pulse width data temporarily stored in the memory 1 and the time-series envelope data stored in the envelope data storage memory 8 are stored in the data storage memory 10 for each transmission source.
In the same radio wave transmission source.

Therefore, according to the pulse signal receiving apparatus of the first embodiment, the IF signal is subjected to high-speed A / D conversion at a frequency five times or more the IF frequency converted by the frequency conversion circuit 2, and the envelope of the IF signal is obtained. The waveform is reproduced almost exactly by the time-series IF sine wave data, the envelope data detection circuit 6 detects the time-series envelope data based on the time-series IF sine wave data, and the cross-correlation circuit 9 generates the time-series envelope. Cross-correlation between data is used to determine that the degree of correlation is equal to or greater than the specified value as that of a pulse signal from the same source. Even if pulse signals transmitted from multiple radio wave sources are mixed in the same frequency band, each data of the received pulse signal is calculated for each radio wave source according to the degree of correlation between the time-series envelope data. It is possible to detect easily separated, can be stored based on the classification.

Embodiment 2 FIG. 6 shows a configuration of the pulse signal receiving device according to the second embodiment of the present invention. In the first embodiment, the correlation is calculated by calculating the cross-correlation between the time-series envelope data for each received pulse signal. In the second embodiment, instead of the cross-correlation circuit 9, the correlation is shown in FIG. The rise time comparison circuit 12 is provided so as to detect "pulse rise time" as characteristic data different for each radio wave source from the time-series envelope data, and compare the pulse rise time for each received pulse signal. It is characterized in that it is classified into the same radio wave transmission source based on the comparison result. In the second embodiment, since the configuration other than the rise time comparison circuit 12 is the same as that of the first embodiment, the same components as those of the first embodiment shown in FIG. The same reference numerals are given and the description is omitted.

Next, the operation of the second embodiment will be described. The operation until the time-series envelope data of the received pulse signal is stored in the envelope data storage memory 8 and the frequency data and the pulse width data of the received pulse signal are stored in the buffer memory 11 is described in the first embodiment. Since it is the same as the case of, it is omitted.

The envelope data storage memory 8 stores the time-series envelope data (t0, H0) to
When (te, He) is stored, the rise time comparison circuit 1
2 is the following (1) from the time-series envelope data of each received pulse signal stored in the envelope data storage memory 8;
The time of (2) is calculated. (1) Time (tmax) when the time-series envelope data reaches the maximum amplitude level (Hmax). (2) The time (trise) when the time-series envelope data reaches the specified level (Hrise).

Note that the above (1),
The time relationship of (2) is as shown in FIG.

Next, the rise time comparison circuit 12 calculates the time difference Δtr between tmax and trise thus obtained,
The time difference Δtr is defined as a pulse rise time which is characteristic data of the pulse, and the rise times Δtr of all the received pulse signals are compared with each other, and the difference dif = | Δtr1-Δt
r2 | is calculated. Here, Δtr1 and Δtr2 indicate the rise time of each received pulse signal.

The rise time comparison circuit 12 determines whether there is a set of received pulse signals in which the difference dif between the rise times Δtr is equal to or less than a specified value, and determines the difference dif between the rise times Δtr as a specified value. The following set of received pulse signals is regarded as a pulse signal from the same source, and the frequency data and pulse width data temporarily stored in the buffer memory 11 and the envelope data stored in the envelope data storage memory 8 are stored. The stored time-series envelope data is stored in the data storage memory 10 for each transmission source for each radio wave transmission source.

Therefore, according to the pulse signal receiving apparatus of the second embodiment, the IF signal is subjected to high-speed A / D conversion at a frequency five times or more the IF frequency converted by the frequency conversion circuit 2 and the envelope of the IF signal is obtained. The waveform is reproduced almost accurately by the time-series IF sine wave data, the envelope data detection circuit 6 detects the time-series envelope data based on the time-series IF sine wave data, and the rise time comparison circuit 12 generates the time-series envelope data. Since the pulse rise times of the line data are calculated and the pulse rise times are compared with each other, and those whose pulse rise times are equal to or less than a specified value are determined to be those of the pulse signal from the same source, As in the case of the first embodiment, even if radio waves whose pulse arrival timing constantly fluctuates are mixed, or a pulse transmitted from a plurality of radio wave transmission sources in the same frequency band is used. No. is be mixed, it is possible to detect easily separate the data of the received pulse signal for each radio sources, may be stored based on the classification.

Also, in the second embodiment, focusing on the pulse rise time of the time-series envelope data for each radio wave source, the pulse rise time is set for each set of received pulse signals input by the rise time comparison circuit 12. Since the signals are classified into signals of the same radio wave transmission source by comparing the time, unlike the first embodiment, all the envelope data of the received pulse signals measured by the high-speed A / D conversion are compared between the received pulse signals. There is no need to compare and determine the degree of correlation, and processing can be performed at high speed.

Embodiment 3 FIG. 8 shows the configuration of the pulse signal receiving device according to the third embodiment of the present invention. In the second embodiment, the rise time comparison circuit 12 for each reception pulse signal is provided, and the “pulse rise time”, which is characteristic data different for each radio wave transmission source, is compared for each pair of reception pulse signals and the same radio wave is compared. Although the signal is classified into the signal of the transmission source, in the third embodiment, a fall time comparison circuit 13 is provided as shown in FIG. 8 to receive "pulse fall time" which is characteristic data different for each radio wave transmission source. It is characterized in that the same radio wave transmission source is classified for each pulse signal compared with each other. In the third embodiment, the configuration other than the rise time comparison circuit 12 is the same as that of the first and second embodiments.
Therefore, in FIG. 8, the same components as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

Next, the operation of the third embodiment will be described. The time-series envelope data of the received pulse signal is stored in the envelope data storage memory 8, and the frequency data and pulse width data of the received pulse signal are stored in the buffer memory 11.
Are the same as those in the first and second embodiments, and therefore will not be described.

Then, the envelope data storage memory 8 stores the time-series envelope data (t0, H0) to
When (te, He) is stored, the fall time comparison circuit 13
Calculates the following time from the stored time-series envelope data (t0, H0) to (te, He) of each received pulse signal. (3) Time (tmax) when the time-series envelope data reaches the maximum amplitude level (Hmax). (4) The time series envelope data is once at the specified level (Hrise)
(Tf) before returning to the specified level (Hrise)
all)

The fall time comparison circuit 13 calculates the time difference (Δtf) between tmax and tfall thus obtained, and uses this time difference (Δtf) as the pulse fall time, which is the characteristic data of the pulse, for all the received pulse signals. Fall time Δtr
And the difference dif = | Δtr1-Δtr2 |
Is calculated. Here, Δtr1 and Δtr2 indicate the fall time of each received pulse signal.

The fall time comparison circuit 12 determines whether there is a set of received pulse signals in which the difference dif between the fall times Δtr is equal to or less than a specified value, and determines the difference dif between the fall times Δtr. Are regarded as pulse signals from the same source, and the frequency data and pulse width data of the received signal temporarily stored in the buffer memory 11 and the envelope data storage are stored. The time-series envelope data of the received signal stored in the memory 8 is stored in the data storage memory 10 for each transmission source for each radio wave transmission source.

Therefore, according to the pulse signal receiving apparatus of the third embodiment, as in the case of the second embodiment, even when radio waves whose pulse arrival timing constantly fluctuates are mixed, or in the same frequency band, Even if pulse signals transmitted from multiple radio sources are mixed, each data of the received pulse signal can be easily separated and detected for each radio source, and stored based on the classification. Can be. Further, as in the second embodiment, it is not necessary to compare all of the envelope data of the received pulse signals measured by the high-speed A / D conversion between the received pulse signals to determine the degree of correlation. Can be.

Embodiment 4 FIG. FIG. 9 shows the configuration of the pulse signal receiving device according to the fourth embodiment of the present invention. In the first embodiment, the correlation is calculated by calculating the cross-correlation between the time-series envelope data for each reception pulse signal, and the reception pulse signal is classified for each radio wave transmission source based on the correlation. However, in the fourth embodiment, the time series envelope data detected by the envelope data detection circuit 3 is not composed of sine waves of IF frequency not subjected to digital data processing such as envelope calculation, instead of time series envelope data. Using the sequence IF sine wave data, the degree of correlation between the time series IF sine wave data is calculated for each pair of received pulse signals, and the plurality of reception pulse signals received at the same timing or the like are determined based on the degree of correlation. It is characterized in that it is classified and stored for each radio wave transmission source.

More specifically, in the fourth embodiment, as shown in FIG.
A sine wave data memory 14 is provided, and a high-speed A
The time series IF sine wave data converted by the / D conversion circuit 3 is directly stored in the IF sine wave data memory 14, and other configurations are the same as those of the first embodiment. As shown in FIG.
The same reference numerals are given to the same components as those of the first embodiment shown in FIG.

Next, the operation of the fourth embodiment will be described. The pulse signal arriving via the input antenna 1, the frequency conversion circuit 2, and the high-speed A / D conversion circuit 3 is (t
n, Pn) digital RF memory (DRFM) 4
After that, the operation until the frequency calculation circuit 5, the envelope data detection circuit 6, and the pulse width (PW) calculation circuit 7 calculate each data is the same as the operation of the first embodiment.

In the fourth embodiment, however, the envelope data detection circuit 6 sends the time-sequence envelope data for calculating the pulse width to the pulse width (PW) calculation circuit 7,
It is not output to the F sine wave data memory 14.

The IF sine wave data memory 14 stores the IF sine wave data of the received pulse signal in digital RF by the high-speed A / D conversion circuit 3 when the input of the received pulse signal is completed.
The data is input from a memory (DRFM) 4 and stored for each reception pulse signal for a predetermined time.

After the IF sine wave data for each received pulse signal received within a predetermined time is stored in the IF sine wave data memory 14, the cross-correlation circuit 9 stores the IF sine wave data in the IF sine wave data memory 14. The cross-correlation of the time-series IF sine wave data of each received pulse signal is calculated to calculate the degree of correlation between all input received pulse signals. The frequency data and pulse width data of the received pulse signal temporarily stored in the buffer memory 11 and the time series of the received pulse signal stored in the envelope data storage memory 8 are regarded as being from the transmission source. The envelope data is stored in the data storage memory 10 for each transmission source for each radio wave transmission source.

Therefore, according to the pulse signal receiving apparatus of the fourth embodiment, the IF signal is subjected to high-speed A / D conversion at a frequency five times or more the IF frequency converted by the frequency conversion circuit 2, and the envelope of the IF signal is obtained. The waveform is reproduced almost exactly by the time-series IF sine wave data, and the cross-correlation circuit 9 performs cross-correlation between the time-series IF sine wave data and outputs a signal having a correlation degree equal to or more than a specified value to a pulse signal from the same source. Because it is determined that the pulse signal arrives at the same time, even if radio waves whose pulse arrival timing constantly fluctuates are mixed, or even if pulse signals transmitted from multiple radio wave sources are mixed in the same frequency band, The data of the received pulse signal can be easily separated and detected for each radio wave source based on the degree of correlation between the series IF sine wave data, and can be stored based on the classification.

Embodiment 5 FIG. FIG. 10 shows a configuration of the pulse signal receiving device according to the fifth embodiment of the present invention. In the first embodiment, the pulse data and the time-series envelope data of the received pulse signal are classified for each radio wave transmission source by taking a cross-correlation between the time-series envelope data of each received pulse signal within a predetermined time. However, in the fifth embodiment,
As shown in FIG. 10, a detected source correlation circuit 15 and a detected source data memory 16 are further added to the pulse signal receiving device of the first embodiment, and data for each source is stored at a new timing. When the pulse data and the time-series envelope data for each transmission source are stored in the memory 10, whether the radio transmission source has been detected at another timing before that, that is, at another predetermined time before that. It is characterized in that it is determined whether the data is from a new radio wave transmission source and the data and the detection time are newly registered.

Next, the operation of the fifth embodiment will be described. The operation from when a pulse signal of a radar or the like reaches and is input to the input antenna 1 and is stored as pulse data for each transmission source in the data storage memory 10 for each transmission source is the same as that of the first embodiment. Therefore, the subsequent operation will be described.

That is, in the fifth embodiment, a pulse signal is received within a new predetermined time, and the pulse data and the time series of the received pulse signal classified for each radio wave transmission source are stored in the data storage memory 10 for each transmission source. Once the envelope data is stored,
Based on the data of the detected radio wave source stored in the detected source data memory 16, the detected source correlation circuit 15 generates a new radio signal of the received pulse signal based on the detected radio wave. Determine if it is the source.

Specifically, the detected source correlation circuit 15
When the pulse data and the time-series envelope data of the received pulse signal classified for each radio wave source are stored in the data memory 10 for each source, first, the time-series envelope data and the detected source data are stored. The correlation with the time-series envelope data of the detected radio wave transmission source already stored in the memory 16 is calculated to calculate the degree of correlation.

Here, the detected source correlation circuit 15
Whether the degree of correlation between the time-series envelope data and the time-series envelope data of the detected radio source stored in the detected source data memory 16 is, for example, whether or not the cross-correlation circuit 9 indicates the same radio source. It is determined whether or not the correlation is equal to or greater than the specified value when the determination is made.If the correlation is determined to be equal to or greater than the specified value, the data of the radio wave source of the time-series envelope data is already detected and transmitted. Source data memory 1
6 and determines that the detection of the radio wave transmission source is a continuous detection, and updates the latest detection time of the radio wave transmission source in the detected transmission source data memory 16 as the latest detection time. To do it.

On the other hand, the degree of correlation between the time-series envelope data and all the time-series envelope data of the detected source which is already stored in the detected source data memory 16 is calculated, and all the correlations are defined. If the value is less than the value, the detected source correlation circuit 15 determines that the detected radio source is a new target, and determines the frequency data of the radio source,
The pulse width data and the pulse time series envelope data are used as a new radio wave transmission source, and the detected transmission source data memory 1 is used.
6 for storage. At this time, the determination time is also output as the latest detection time of the new radio wave transmission source attached to the above data, and stored in the detected transmission source data memory 16 as the detection time.

The detected source data memory 16
In the case where no data of the detected transmission source is stored at all, for example, in the initial state or the like, the detected transmission source correlation circuit 15 stores the frequency data and the frequency data stored for each transmission source in the data storage memory 10 for each transmission source. , Pulse width data, time-sequence envelope data, etc. are output to the detected source data memory 16 as newly detected radio source and stored. Note that the output time at this time is also attached to the data as the latest detection time, output, and stored together.

Therefore, according to the pulse signal receiving device of the fifth embodiment, a detected source correlation circuit 15 and a detected source data memory 16 are further added to the pulse signal receiving device of the first embodiment. When pulse data and time-series envelope data for each transmission source are stored in the transmission-source data storage memory 10 at another timing, the detected transmission source correlation circuit 15 stores each data of the radio transmission source. Is determined by the radio transmission source detected at another earlier timing to determine whether or not continuous detection is to be performed. If it is determined that continuous detection is to be performed, the radio transmission source in the detected source data memory 16 is determined. While only the latest detection time is updated, if it is determined that the newly detected radio transmission source is registered, each data of the radio transmission source is stored in the detected transmission source data memory 16. Since it is added together with the latest detection time, even if a pulse signal is received at a different timing and stored separately in the data storage memory 10 for each source, the detected signal stored in the detected source data memory 16 is stored. With reference to each data of the radio wave transmission source, it is possible to determine whether it is the continuous detection of the radio wave transmission source already detected or the detection of the new radio wave transmission source, and store it together with the latest detection time.

Embodiment 6 FIG. FIG. 11 shows a configuration of the pulse signal receiving device according to the sixth embodiment of the present invention. In the second embodiment, the received pulse signals are classified by radio wave transmission source by comparing the pulse rise time of each received pulse signal within a predetermined time. In the sixth embodiment, FIG. As shown, the second embodiment
In addition, the detected source rising comparison circuit 17 and the detected source data memory 16
To determine whether or not the signal of the radio wave source detected at the previous timing is continuous detection by comparing the pulse rise time.If the signal is from a new radio wave source, the data and detection time are newly added. And the like. That is, the relationship of the sixth embodiment to the second embodiment is the same as the relationship of the fifth embodiment to the first embodiment.

Next, the operation of the sixth embodiment will be described. The operation from when a pulse signal of a radar or the like reaches and is input to the input antenna 1 and is stored as pulse data for each transmission source in the data storage memory 10 for each transmission source is the same as that of the first embodiment. Therefore, the subsequent operation will be described.

That is, in the sixth embodiment, a pulse signal is received within a new predetermined time, and the pulse data and time series of the received pulse signal classified for each radio wave transmission source are stored in the data storage memory 10 for each transmission source. Once the envelope data is stored,
The detected transmission source rise time comparison circuit 17 refers to the data of the detected radio transmission source already stored in the detected transmission source data memory 16 and determines whether the radio transmission source of the new received pulse signal It is determined whether or not the detected radio wave transmission source has been detected previously.

More specifically, the detected transmission source rise comparison circuit 17 stores the pulse data of the received pulse signal and the pulse rise time data classified for each radio wave transmission source in the data storage memory 10 for each transmission source. First, the pulse rise time data is compared with the pulse rise time data of the detected radio wave transmission source already stored in the detected source data memory 16, and the pulse rise time data and the detected source data memory are compared. 16 is not more than a prescribed value when the rise time comparison circuit 12 determines whether or not the same radio wave transmission source is the same, for example, the pulse rise time data of the detected radio wave transmission source already stored in 16 Judge.

If it is determined that the difference between the pulse rise time data is equal to or smaller than the specified value, the detected source rise comparison circuit 17 determines that the data of the radio wave source of the pulse rise time data has already been detected. It is stored in the transmission source data memory 16 and determines that the detection of the radio wave transmission source is continuous detection, and updates the detection time of the data in the detected transmission source data memory 16 with the determined time as the latest detection time. To do.

On the other hand, if the difference between the pulse rise time data and the pulse rise time data of all the detected transmission sources already stored in the detected transmission source data memory 16 is all larger than a specified value, the detected transmission source The source rise comparison circuit 17 determines that the radio wave source detected this time is a new target, and uses the frequency data, pulse width data, and pulse rise time data of the radio wave source as those of the new radio wave source. Is output to the detected transmission source data memory 16 and stored. At this time, the determination time is also output as the latest detection time attached to each of the data and stored in the detected transmission source data memory 16 as the detection time.

Therefore, according to the pulse signal receiving apparatus of the sixth embodiment, a detected source rising time circuit 17 and a detected source data memory 16 are further provided in the pulse signal receiving apparatus of the second embodiment. In addition, when pulse data and pulse rise time data for each transmission source are stored in the data storage memory 10 for each transmission source at a new timing, the radio transmission source detects the radio wave detected at another timing before that. It is determined whether or not continuous detection is performed for the transmission source. If it is determined that continuous detection is performed, only the latest detection time in the detected transmission source data memory 16 is updated. When it is determined that the source is registered, the pulse data of the source is added to the detected source data memory 16 together with the latest detection time. Therefore, similarly to the case of the fifth embodiment, even when a pulse signal is received at another different timing and stored separately in the data storage memory 10 for each transmission source, the pulse signal is stored in the detected transmission source data memory 16. By referring to each data of the detected radio wave source, it is possible to determine whether the detected radio wave source is a continuous detection or a new radio wave source is detected and store it together with the latest detection time. it can.

Embodiment 7 FIG. 12 shows a configuration of the pulse signal receiving device according to the seventh embodiment of the present invention. In the third embodiment, the received pulse signals are classified for each radio wave transmission source by comparing the pulse fall time of each received pulse signal within a predetermined time. However, in the seventh embodiment, FIG. As shown in the figure, the pulse signal receiving apparatus according to the third embodiment further includes a detected source fall comparison circuit 18 and a detected source data memory 16 so that the signal of the radio source detected at the previous timing is provided. Whether the detection is continuous detection is performed by comparing the pulse rise time, and if the signal is from a new radio wave transmission source, the data and the detection time are newly registered. . That is, the relationship of the seventh embodiment to the third embodiment is the same as the relationship of the fifth and sixth embodiments to the first and second embodiments.

For this reason, the operation of the seventh embodiment is based on the pulse rise time, except that it is determined whether or not the signal is from the new radio wave source at the pulse fall time. This is the same as the operation of the sixth embodiment for judging whether or not it is the one.

Therefore, according to the pulse signal receiver of the seventh embodiment, the detected source fall time circuit 18 and the detected source data memory 16 are different from the pulse signal receiver of the third embodiment. Has been added,
As in the case of the sixth embodiment and the like, even when a pulse signal is received at another different timing and stored separately in the data storage memory 10 for each transmission source, the pulse signal is stored in the detected transmission source data memory 16. By referring to each data of the detected radio wave source, it can be determined whether the detected radio wave source is continuous detection or a new radio wave source is detected and stored together with the latest detection time. .

Embodiment 8 FIG. FIG. 13 shows the configuration of the pulse signal receiving device according to the eighth embodiment of the present invention. In the fourth embodiment, the received pulse signals are classified by radio wave transmission source by taking a cross-correlation between the time-series IF sine wave data of each received pulse signal within a predetermined time. Then, as shown in FIG. 13, a detected source IF correlation circuit 19 and a detected source data memory 16 are further provided in the configuration of the fourth embodiment having the configuration shown in FIG. Judgment is made based on the degree of correlation with the registered time-series IF sine wave data as to whether the detected signal of the radio wave source is continuous detection or not. If the signal is from a new radio wave source, the data and the detection time are determined. It is characterized in that it is newly registered.
That is, the relationship of the eighth embodiment with respect to the fourth embodiment is the same as that of the fifth to fifth embodiments.
7 are the same as each other.

Therefore, the operation of the eighth embodiment is based on the correlation between the detected transmission source data memory 16 and the time-series IF sine wave data. In the above-described embodiment, the determination is made based on the degree of correlation with the time-series envelope data already registered in the detected source data memory 16 except that the source is from a new radio source. 5 is the same as the operation of FIG.

Therefore, according to the pulse signal receiving apparatus of the eighth embodiment, a detected source IF correlation circuit 19 and a detected source data memory 16 are further provided in the pulse signal receiving apparatus of the fourth embodiment. In addition, when pulse data and time-series IF sine wave data for each transmission source are stored in the data storage memory 10 for each transmission source at another timing, the detected source correlation circuit 15 outputs It is determined whether or not each data is of the radio wave source detected at another timing before that and whether the continuous detection is performed. If it is determined that the continuous detection is performed, the radio wave in the detected source data memory 16 is detected. While only the latest detection time of the transmission source is updated, if it is determined that the newly detected radio transmission source is registered, the detected transmission source data memory 16 stores that radio transmission source. Since the data is added together with the latest detection time, similar to the above-described fifth to seventh embodiments, when the pulse signal is received at another different timing and stored separately in the data storage memory 10 for each transmission source. However, by referring to each data of the detected radio wave source stored in the detected source data memory 16, it is determined whether the detected radio wave source is a continuous detection or a new radio wave source is detected. And can be stored together with the latest detection time.

Embodiment 9 FIG. 14 shows the configuration of the pulse signal receiving device according to the ninth embodiment of the present invention. FIG.
In the fifth embodiment described above, the cross-correlation between time-series envelope data for each received pulse signal within a predetermined time is taken to classify pulse trains, to continuously detect a detected source or to register a newly detected radio source. In the ninth embodiment, an identification table correlation circuit 20, an identification table memory 21a, and an identification result storage memory 22 are added to the pulse signal receiving apparatus of the fifth embodiment, and It is characterized in that it is determined whether each data of the radio wave transmission source registered in the source data memory 16 is a radio wave transmission source registered in advance in the identification table memory 21a. Therefore, in the identification table memory 21a of the ninth embodiment, the name of each radio wave source and the radio time series envelope data of the pulse signal transmitted from each radio wave source correspond to each radio wave source. Is stored in advance.

Next, the operation of the ninth embodiment will be described. The operation until the detected pulse data of the detected radio wave source is stored in the detected source data memory 16 is the same as that of the fifth embodiment. Therefore, the subsequent operation will be described.

That is, in the ninth embodiment, it is judged that the detected radio wave source has been newly detected by the detected radio wave source correlation circuit 15, and the data of the new radio wave transmission source is stored in the detected radio wave source data memory 16. Then, the identification table correlation circuit 20 outputs the time-series envelope data of the detected source newly stored in the detected source data memory 16;
The correlation degree is calculated by correlating the pulse signal output from each radio wave source with the radio time series envelope data stored in advance in the identification table memory 21a along with the name of each radio wave source.

Then, the identification table correlation circuit 20 determines whether the calculated correlation degree is, for example, at the time of pulse train classification in the cross-correlation circuit 9 or when it is determined whether or not the detected transmission source correlation circuit 15 is a detected transmission source. It is determined whether or not the used value is equal to or more than the specified value. If the correlation is equal to or more than the specified value, it is determined that the radio wave transmission source is registered in advance in the identification table memory 21a. The name of the radio wave source set in 21a is output to the identification result storage memory 22 and stored.

Therefore, according to the ninth embodiment, an identification table correlation circuit 20, an identification table memory 21a and an identification result storage memory 22 are added to the configuration of the fifth embodiment, and Data memory 1
6 stores the data of the newly detected radio wave transmission source, the identification table correlation circuit 20 stores the data of the newly detected radio wave transmission source in the identification table memory 2.
1a, whether or not the radio wave transmission source is registered in advance is identified. If the radio transmission source is registered in advance, the name of the radio wave transmission source is registered in the identification result storage memory 22. In addition to the effects of the fifth embodiment,
It is possible to easily and quickly recognize whether or not the detected radio wave transmission source has been registered in advance.

Embodiment 10 FIG. FIG. 15 shows the configuration of the pulse signal receiving device according to the tenth embodiment of the present invention. In the sixth embodiment shown in FIG. 11, the pulse train classification and the continuous detection of the detected transmission source or the registration of the newly detected radio transmission source are performed by comparing the pulse rise times of the received pulse signals within a predetermined time. However, in the tenth embodiment, as shown in FIG. 15, the identification table rise time comparison circuit 23 and the identification table memory 2
1b, an identification result storage memory 22 is added to identify whether each data of a radio wave source registered in the detected source data memory 16 is a radio wave source previously registered in the identification table memory 21b. It is characterized by doing so. Therefore, the identification table memory 21b of the tenth embodiment stores the name of the radio wave source to be identified for each radio wave source and the pulse rise time data of the pulse signal transmitted from each radio wave source. Is stored in advance.

Next, the operation of the tenth embodiment will be described. The operation until the detected pulse data of the detected radio wave source is stored in the detected source data memory 16 is the same as that of the sixth embodiment. Therefore, the subsequent operation will be described.

That is, in the tenth embodiment, it is determined by the detected rising comparison circuit 15 that a new radio wave transmission source has been detected, and the data of the new radio transmission source is stored in the detected transmission source data memory 16. Then, the identification table rise time comparison circuit 23 stores in advance the pulse rise time of the detected source newly stored in the detected source data memory 16 and the name of the radio wave source in the identification table memory 21a. The pulse rise time is compared with the pulse rise time.

Then, the identification table rise time comparison circuit 23 compares the pulse rise time difference as a result of the comparison when the pulse train is classified in the rise time comparison circuit 12 and the detected source in the detected transmission source rise comparison circuit 17. It is determined whether or not the value is equal to or less than the specified value used in the determination. If it is determined that the value is equal to or less than the specified value, it is determined that the radio wave transmission source is previously registered in the identification table memory 21b. The radio wave source name registered in the identification table memory 21b is stored in the identification result storage memory 22.
To be registered.

Therefore, according to the tenth embodiment, an identification table rise time comparison circuit 23, an identification table memory 21b and an identification result storage memory 22 are further added to the configuration of the sixth embodiment, and When the detected radio wave transmission source is registered in advance in the identification table memory 21b, the name of the radio transmission source is registered in the identification result storage memory 22, so that the effect of the sixth embodiment is added. Further, it is possible to easily and quickly recognize whether or not the detected radio wave transmission source has been registered in advance.

Embodiment 11 FIG. FIG. 16 shows the configuration of the pulse signal receiving device according to the eleventh embodiment of the present invention. In the seventh embodiment shown in FIG. 12, by comparing the pulse fall times of the received pulse signals within a predetermined time, the pulse train classification and the continuous detection of the detected transmission source or the registration of the newly detected radio transmission source are performed. However, in the eleventh embodiment, as shown in FIG. 16, the identification table fall time comparison circuit 24 and the identification table memory 2
1c, an identification result storage memory 22 is added to identify whether each data of the radio wave source registered in the detected source data memory 16 is a radio wave source registered in advance in the identification table memory 21c. It is characterized by doing so.

Therefore, the identification table memory 21c of the tenth embodiment stores the name of the radio wave source to be identified for each radio wave source and the pulse fall time of the pulse signal transmitted from each radio wave source. Data is stored in advance in association with the data, and the operation of the eleventh embodiment is based on only the difference between the fall time data and the rise time data.
0 is the same as the operation.

Therefore, according to the eleventh embodiment, an identification table rise time comparison circuit 23, an identification table memory 21c and an identification result storage memory 22 are further added to the configuration of the seventh embodiment, and When the detected data of the radio wave transmission source is registered in advance in the identification table memory 21c, the radio wave transmission source is registered in the identification result storage memory 22, so that the effect of the seventh embodiment can be obtained. In addition, as in the case of the first embodiment, it is possible to easily and quickly recognize whether or not the detected radio wave transmission source has been registered in advance.

Embodiment 12 FIG. FIG. 17 shows a configuration of a pulse signal receiving apparatus according to Embodiment 12 of the present invention. In the eighth embodiment shown in FIG. 13, the cross-correlation between time-series IF sine wave data of each received pulse signal within a predetermined time is taken to classify pulse trains, to continuously detect a detected source, or to newly detect a radio wave. In the twelfth embodiment, as shown in FIG. 17, the identification table I is added to the configuration of the eighth embodiment.
An F cross-correlation circuit 25, an identification table memory 21d, and an identification result storage memory 22 are added to identify whether or not the source is a radio wave source registered in advance in the detected source data memory 16 and the identification table memory 21a. It is characterized by doing so. Therefore, the identification table memory 21d of the eleventh embodiment stores the name of the radio wave source to be identified for each radio wave source, the time-series IF sine wave data of the pulse signal transmitted from each radio wave source, and the like. Are stored in advance correspondingly.

Next, the operation of the twelfth embodiment will be described. The operation until pulse data of the detected radio wave transmission source is stored in the detected transmission source data memory 16 is the same as that of the eighth embodiment. Therefore, the subsequent operation will be described.

That is, in the twelfth embodiment, it is determined that the detected source IF correlation circuit 19 has newly detected the radio source, and the detected source data memory 16 stores the data of the new radio source in the detected source data memory 16. When stored, the identification table IF correlation circuit 25 stores the time-series IF sine wave data of the detected transmission source newly stored in the detected transmission source data memory 16 and the name of each radio transmission source in the identification table memory 21a. In addition, the correlation between the pulse signal output from each radio wave transmission source and the time-series IF sine wave data stored in advance is calculated to calculate the degree of correlation.

Then, the identification table IF correlation circuit 25
Indicates whether the calculated degree of correlation is equal to or greater than a specified value used, for example, when classifying a pulse train in the cross-correlation circuit 9 and determining whether or not the detected source is a detected source in the detected source IF correlation circuit 19. If the radio wave source is equal to or greater than the specified value, it is determined that the radio wave source is registered in advance in the identification table memory 21d, and the radio wave source name set in the identification table memory 21d is identified. The data is output to the storage memory 22 and stored.

Therefore, according to the twelfth embodiment, an identification table IF is further added to the configuration of the eighth embodiment.
The correlation circuit 25, the identification table memory 21d, and the identification result storage memory 22 are added. If the newly detected radio wave source is registered in the identification table memory 21d in advance, the radio wave source is identified as the identification result. Storage memory 2
In addition to the effect of Embodiment 7 described above, it is possible to easily and quickly recognize whether or not the detected radio wave transmission source has been registered in advance.

Embodiment 13 FIG. FIG. 18 shows the configuration of the pulse signal receiving apparatus according to Embodiment 13 of the present invention. In the first embodiment, for a set of pulses within a predetermined time, a cross-correlation between the respective time-series envelope data is taken to classify the received pulse signal for each radio wave transmission source. In the thirteenth embodiment, instead of the envelope data storage memory 8 and the cross-correlation circuit 9 according to the first embodiment shown in FIG. 1, as shown in FIG. An identification table memory 21a in which radio time series envelope data of a pulse signal transmitted from a source is registered in advance and an envelope correlation filter 26 is provided, and the envelope correlation filter 26 is stored in the identification table memory 21a in advance. It is characterized in that time-series envelope data correlated with the stored time-series envelope data and its pulse data are stored in the data storage memory 10 for each transmission source. It is an. In the thirteenth embodiment, the names of the radio wave sources to be detected need not always be stored in the identification table memory 21a in advance.

Therefore, according to the thirteenth embodiment,
When the time-series envelope data calculated by the envelope data detection circuit 6 is input to the time-series envelope data cross-correlation filter 26, the time-series envelope data cross-correlation filter 26
Takes a cross-correlation with the input time-series envelope data and all the time-series envelope data of each radio wave source registered in advance in the identification table memory 21a, and as a result, the degree of correlation exceeds a specified value. Only the high pulse is passed, and the passed time-series envelope data and the pulse data of the pulse signal having the time-series envelope data temporarily stored in the buffer memory 11 are stored in the data storage memory 10 for each transmission source.
To memorize it. The calculation of the degree of correlation and the determination of the degree of correlation in the time-series envelope data cross-correlation filter 26 are the same as those in the first embodiment.

Therefore, according to the thirteenth embodiment, an identification table memory 21a and an envelope correlation filter 26 are provided instead of the envelope data storage memory 8 and the cross-correlation circuit 9 of the first embodiment. Only the time-series envelope data and pulse data that can be correlated with the time-series envelope data in the specified identification table are stored in the data memory 10 for each transmission source. As in the case of the first embodiment, even if a pulse train of a transmission source is formed and a radio wave whose pulse arrival timing constantly fluctuates is mixed, a reception pulse signal transmitted from a plurality of radio wave transmission sources in the same frequency band Can be easily separated and detected for each radio wave transmission source, and can be stored based on the classification.

Embodiment 14 FIG. FIG. 19 shows the configuration of the pulse signal receiving apparatus according to Embodiment 14 of the present invention. In the second embodiment, the received pulse signal is classified for each radio wave transmission source by comparing each pulse rise time with respect to a set of pulses within a predetermined time, but in the fourteenth embodiment, Instead of the envelope data storage memory 8 and the rise time comparison circuit 12 according to the second embodiment shown in FIG. 6, as shown in FIG.
An identification table memory 21b in which the name of each radio wave source to be detected and the rise time data transmitted from each radio wave source are registered in advance, and a rise time filter 2
7 and the rise time filter 27 stores in the data memory 10 for each source the rise time data whose time difference from the rise time data previously stored in the identification table memory 21b is equal to or less than a specified value and the pulse data. It is characterized by doing so.

Therefore, according to the fourteenth embodiment, the identification table memory 2 is used instead of the envelope data storage memory 8 and the rise time comparison circuit 12 of the second embodiment.
1b and a rise time filter 27 are provided, and only the time-series envelope data correlated with the time-series envelope data registered in advance in the identification table memory 21b and its pulse data are stored in the per-source data storage memory 10. Therefore, a pulse train of the same radio wave source is formed at the time of passing through the rise time filter 27, and even when radio waves whose pulse arrival timing constantly fluctuates are mixed, as in the case of the second embodiment and the like, Each data of the received pulse signal transmitted from a plurality of radio wave sources in the same frequency band can be easily separated and detected for each radio wave source, and
It can be stored based on the classification.

Embodiment 15 FIG. FIG. 20 shows the configuration of the pulse signal receiving apparatus according to Embodiment 15 of the present invention. In the third embodiment, the received pulse signals are classified for each radio wave transmission source by comparing each pulse fall time with respect to a set of pulses within a predetermined time. Instead of the envelope data storage memory 8 and the fall time comparison circuit 12 of the third embodiment shown in FIG. 8, the names of the radio wave sources to be detected and the radio wave An identification table memory 21c in which fall time data transmitted from the source is registered in advance and a fall time filter 28 are provided, and a fall time filter 27 is provided in the fall table stored in the identification table memory 21c in advance. The fall time data whose time difference from the time data is equal to or less than a specified value and the pulse data thereof are stored in the data memory 10 for each transmission source. It is an feature.

Therefore, according to the fifteenth embodiment, the identification table memory 2 is used instead of the envelope data storage memory 8 and the fall time comparison circuit 12 of the second embodiment.
1c and a fall time filter 28 are provided, and only the time-series envelope data correlated with the time-series envelope data registered in advance in the identification table memory 21c and its pulse data are stored in the per-source data storage memory 10. Therefore, a pulse train of the same radio wave transmission source is formed at the time of passing through the fall time filter 28, and radio waves whose pulse arrival timing constantly fluctuates are mixed as in the case of the second embodiment and the like. Also, while being able to easily separate and detect each data of the received pulse signal transmitted from a plurality of radio wave sources in the same frequency band for each radio wave source,
It can be stored based on the classification.

Embodiment 16 FIG. FIG. 21 shows a configuration of a pulse signal receiving apparatus according to Embodiment 16 of the present invention. In the fourth embodiment, for a set of pulses within a predetermined time, a cross-correlation between the respective time-series IF sine wave data is used to classify the received pulse signal for each radio wave transmission source. In the sixteenth embodiment, instead of the IF sine wave data memory 14 and the cross-correlation circuit 9 of the fourth embodiment, as shown in FIG. An identification table memory 21d in which the time-series IF sine wave data is registered in advance and an IF sine wave correlation filter 29 are provided. When the IF sine wave correlation filter 29 is stored in the identification table memory 21d in advance. Time-sequential IF sine wave data having a degree of correlation with the series IF sine wave data equal to or greater than a specified value and the pulse data thereof are stored in the data storage memory 10 for each transmission source.
Is stored.

Therefore, according to the sixteenth embodiment, an identification table memory 21d and an IF sine wave correlation filter 29 are provided instead of the IF sine wave data memory 14 and the cross-correlation circuit 9 of the fourth embodiment. Since only the time-series IF sine wave data that can be correlated with the time-series IF sine wave data registered in advance in the identification table memory 21d and its pulse data are stored in the data storage memory 10 for each source, the IF sine wave correlation When passing through the filter 29, a pulse train of the same radio wave transmission source is formed. As in the case of the fourth embodiment and the like, even if radio waves whose pulse arrival timing constantly fluctuates are mixed, a plurality of Each data of the received pulse signal transmitted from the radio wave source can be easily separated and detected for each radio wave source, and the It can be stored based on.

[0107]

As described above, according to the present invention, the received pulse signal converted to a predetermined frequency to be detected by the present apparatus is A / D-converted into a time series at a frequency higher than the predetermined frequency, and the time series is converted. Based on the received A / D converted reception pulse signal, time series envelope data and characteristic data such as pulse rise time and pulse fall time are detected for each reception pulse signal, and the pulse signal received within a predetermined time is detected. Since the received pulse signals are classified for each radio wave source based on the comparison result, the pulse signals transmitted from a plurality of radio wave sources at the same timing and in the same frequency band are compared. Even if they are mixed, the pulse signal can be separated and detected for each radio wave source,
Even if radio waves whose pulse arrival timing constantly fluctuates are mixed, they can be separated and detected.

In the next invention, the amplitude value of the received pulse signal converted to a predetermined frequency to be detected by the present apparatus is A / D-converted in time series at a frequency higher than the predetermined frequency,
A cross-correlation is calculated between the time-series sine-wave data of the received pulse signals within a predetermined time which are A / D converted in the time series, and a correlation is calculated. Since the received pulse signal is classified for each radio wave source by judging it as a pulse signal from the same, even if pulse signals sent from multiple radio wave sources are mixed at the same timing and in the same frequency band, the pulse Signals can be separated and detected for each radio wave transmission source, and even if radio waves whose pulse arrival timing constantly fluctuates are mixed, these can be separated and detected.

Further, in the next invention, A
The pulse data of the frequency value and the pulse width are calculated for each received pulse signal based on the / D converted received pulse signal, and the pulse data and characteristic data are classified and stored automatically for each radio wave transmission source. Therefore, it is easy to organize each data for each radio wave transmission source.

Further, in the following invention, when pulse data and characteristic data of a new radio wave transmission source are stored in the data storage means for each transmission source, the characteristic data is stored in the detected transmission source data storage means. If the characteristic data is already stored in the detected source data storage means, only the detection time is updated, while the characteristic data is stored in the detected source data storage means. If not, the pulse data and the characteristic data and the detection time are stored in the detected source data storage means as a new detected source, so that they are received at another timing. Even if each pulse signal data from the same radio wave source exists, it can be further classified as to whether it belongs to the same radio source or not. It is possible to automatically record whether the detected radio wave source is a continuous detection or a new radio wave source, along with the detection time.This enables highly accurate radio wave transmission even in a dense radio wave density environment. Source updates can be performed.

Further, in the next invention, an identification table in which the name and its characteristic data are registered in advance for each radio wave transmission source is provided, and the pulse data of the detected transmission source is stored in the detected transmission source data storage means. Each time it is stored, it is determined whether or not the characteristic data in the pulse data is stored in advance in the identification table. If the characteristic data is stored in advance, the radio wave source is stored. When a registered radio wave transmission source is detected, its name can be automatically recorded, and even in an environment where the radio wave density is dense, the radio wave transmission source can be identified with high accuracy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a pulse signal receiving device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of an amplitude waveform in a pulse of a radar or the like.

FIG. 3 shows an example of input of time-series IF sine wave data and Fourier transform (F
FT) is a diagram showing a target time range and the like.

FIG. 4 is an explanatory diagram showing a method of calculating time-series envelope data by the envelope data detection circuit 6 according to the first embodiment.

FIG. 5 is a pulse width (PW) calculation circuit 7 according to the first embodiment;
FIG. 6 is an explanatory diagram showing a pulse width calculation method using the method shown in FIG.

FIG. 6 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram showing pulse rise times calculated and compared by a rise time comparison circuit 12 according to the second embodiment.

FIG. 8 is a configuration diagram showing a configuration of a pulse signal receiving device according to a third embodiment of the present invention.

FIG. 9 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram showing a configuration of a pulse signal receiving device according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a sixth embodiment of the present invention.

FIG. 12 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a seventh embodiment of the present invention.

FIG. 13 is a configuration diagram showing a configuration of a pulse signal receiving device according to an eighth embodiment of the present invention.

FIG. 14 is a configuration diagram showing a configuration of a pulse signal receiving device according to a ninth embodiment of the present invention.

FIG. 15 is a configuration diagram showing a configuration of a pulse signal receiving device according to a tenth embodiment of the present invention.

FIG. 16 is a configuration diagram showing a configuration of a pulse signal receiving device according to an eleventh embodiment of the present invention.

FIG. 17 is a configuration diagram showing a configuration of a pulse signal receiving device according to a twelfth embodiment of the present invention.

FIG. 18 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a thirteenth embodiment of the present invention.

FIG. 19 is a configuration diagram showing a configuration of a pulse signal receiving device according to a fourteenth embodiment of the present invention.

FIG. 20 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a fifteenth embodiment of the present invention.

FIG. 21 is a configuration diagram illustrating a configuration of a pulse signal receiving device according to a sixteenth embodiment of the present invention.

FIG. 22 is a configuration diagram showing a configuration of a conventional pulse signal receiving device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 input antenna, 2 frequency conversion circuit (frequency conversion means), 3 high-speed A / D conversion circuit (high-speed A / D conversion means), 4 digital RF memory, 5 frequency calculation circuit (pulse data calculation means), 6 envelope data Detection circuit (feature data detection means), 7 PW calculation circuit (pulse data calculation means), 8 envelope data storage memory, 9 cross-correlation circuit (classification means), 10 transmission source data storage memory (transmission source data storage means) ), 11 buffer memory, 12 rise time comparison circuit (classification means), 13
Fall time comparison circuit (classification means), 14 IF sine wave data memory, 15 detected source correlation circuit (detected source data registration means), 16 detected source data memory (detected source data storage means) , 17 detected source rise comparison circuit (detected source data registration means), 18 detected source fall comparison circuit (detected source data registration means), 19 detected source IF
Correlation circuit (detected source data registration means), 20 identification table correlation circuit (detected source identification means), 21
a, 21b, 21c, 21d identification table memory, 2
2 identification result storage memory (identification result storage means), 23
Identification table rise time comparison circuit (detected source identification means), 24 identification table fall time comparison circuit (detected source identification means), 25 identification table IF cross-correlation circuit (detected source identification means), 26 envelope Line data correlation filter (filter means), 27 rise time filter (filter means), 28 fall time filter (filter means), 29 IF sine wave correlation filter (filter means).

Claims (14)

[Claims] 1. A pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave sources and classifies the received pulse signals for each of the radio wave sources. Frequency converting means for converting the received pulse signal into a predetermined frequency by the frequency converting means, high-speed A / D converting means for performing time-series A / D conversion at a frequency higher than the predetermined frequency, and high-speed A A characteristic data detecting means for detecting characteristic data of each received pulse signal based on a received pulse signal which has been A / D converted in time series by the / D converting means; Classification for comparing the feature data of each reception pulse signal with each other and classifying the reception pulse signal for each radio wave transmission source based on the comparison result Pulse signal receiving apparatus characterized by comprising a stage, a. 2. The characteristic data detecting means detects time-series envelope data for each received pulse signal as characteristic data, and the classifying means detects the time-series envelope data for each received pulse signal within a predetermined time detected by the characteristic data detecting means. The cross-correlation between the time-series envelope data is calculated to calculate the degree of correlation, and received pulses having a degree of correlation equal to or greater than a predetermined value are determined as pulse signals from the same source, and the received pulse signal is determined for each radio wave source. The pulse signal receiving device according to claim 1, wherein the pulse signal receiving device is classified as: 3. The characteristic data detecting means detects a rise time for each received pulse signal as characteristic data, and the classification means calculates a predetermined rise time for each received pulse signal detected by the characteristic data detecting means. The rise times are compared for each of the received pulse signals within the time, and the received pulses whose difference between the rise times is equal to or less than a predetermined value are determined as pulse signals from the same transmission source, and the reception pulse signal is transmitted to the radio wave transmission source. The pulse signal receiving device according to claim 1, wherein the pulse signal is classified for each. 4. The characteristic data detecting means detects a fall time for each received pulse signal as characteristic data, and the classifying means calculates a fall time for each received pulse signal detected by the characteristic data detecting means. The fall times are compared for each reception pulse signal within a predetermined time, and the reception pulses whose difference between the fall times is equal to or less than a predetermined value are determined to be pulse signals from the same transmission source, and the reception pulse signal is determined. The pulse signal receiving apparatus according to claim 1, wherein the pulse signal is classified for each radio wave transmission source. 5. A pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave transmitting sources and classifies the received pulse signals for each of the radio wave transmitting sources. Frequency conversion means for converting the amplitude value of the received pulse signal converted to a predetermined frequency by the frequency conversion means, and high-speed A / D conversion means for performing time-series A / D conversion at a frequency higher than the predetermined frequency; A cross-correlation is calculated between the time-series sine wave data of the received pulse signal within a predetermined time which has been time-sequentially A / D-converted by the high-speed A / D conversion means to calculate a degree of correlation, and the degree of correlation is not less than a predetermined value Classifying means for judging the received pulses to be pulse signals from the same transmission source and classifying the reception signals for each radio wave transmission source; 6. A pulse data calculating means for calculating pulse data for each received pulse signal based on a received pulse signal which has been A / D converted in time series by the high-speed A / D converting means, and a characteristic data detecting means. Transmission source data storage means for storing the detected characteristic data for each received pulse signal and the pulse data for each received pulse signal calculated by the pulse data calculation means for each radio wave transmission source based on the classification by the classification means. The pulse signal receiving device according to claim 1, wherein 7. Detected transmission source data storage means for storing at least characteristic data of a detected radio transmission source and its detection time; and characteristic data of a new radio transmission source stored in each transmission source data storage means. It is determined whether or not the feature data is stored in the detected source data storage means, and if the feature data is already stored in the detected source data storage means, While the judgment time is updated as the detection time of the radio wave source of the characteristic data, if the characteristic data is not stored in the detected transmission source data storage means, the characteristic data and the judgment time are updated to the detected time. 7. The pulse signal receiving apparatus according to claim 6, further comprising: a detected source data registering unit that newly stores the source data in the source data storage unit. 8. An identification table in which the name and characteristic data of each radio wave source to be identified are registered in advance, an identification result storing means for storing the name of the radio wave source, Each time characteristic data of a new radio wave transmission source is stored in the source data storage means, it is determined whether or not the characteristic data is stored in the identification table in advance, and the characteristic data is stored in the identification table in advance. The pulse signal receiving device according to claim 7, further comprising: a detected source identification unit that stores the name of the radio source in the identification result storage unit when the identification is performed. 9. A pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave transmission sources and classifies the received pulse signals for each of the radio wave transmission sources. Frequency converting means for converting the received pulse signal into a predetermined frequency by the frequency converting means, high-speed A / D converting means for performing time-series A / D conversion at a frequency higher than the predetermined frequency, and high-speed A Characteristic data detecting means for detecting the characteristic data of each received pulse signal based on the received pulse signal which is A / D converted in time series by the / D converting means; and characteristic data of at least the received pulse signal for each radio wave transmission source And an identification table in which the characteristic data of the received pulse signal detected by the characteristic data detecting means is stored in the identification table. Determining whether previously registered in the table, when the characteristic data of the received pulse signal is previously registered in the identification table only,
A pulse signal receiving apparatus comprising: a filter means for passing the characteristic data; and a data storage means for each transmission source for storing the characteristic data passing through the filter means for each radio wave transmission source. 10. The characteristic data detecting means detects time-series envelope data for each received pulse signal as characteristic data, and the identification table includes, for each radio wave source, at least the time-series envelope data as characteristic data of the received pulse signal. The line data is registered in advance, and the filter unit correlates the time-series envelope data of the received pulse signal detected by the characteristic data detection unit with each of the time-series envelope data registered in the identification table in advance. , Only when there is a degree of correlation equal to or greater than a predetermined value,
10. The pulse signal receiving apparatus according to claim 9, wherein the time-series envelope data is passed and stored for each radio wave source in the data storage means for each radio wave source. 11. A characteristic data detecting means detects a rise time for each received pulse signal as characteristic data, and the identification table registers in advance the rise time data for each radio wave transmission source as characteristic data of at least the received pulse signal. The filter means compares the rise time data of the received pulse signal detected by the characteristic data detection means with each rise time data registered in advance in the identification table to determine a difference, and obtains a difference that is equal to or less than a predetermined value. 10. The pulse signal receiving device according to claim 9, wherein the rise time is passed through only when there is a signal, and stored in the data storage means for each radio wave source for each radio wave source. 12. The characteristic data detecting means detects a fall time for each reception pulse signal as characteristic data, and the identification table stores, for each radio wave transmission source, at least the fall time data as characteristic data of the reception pulse signal. The filter means is registered in advance, and the fall time data of the received pulse signal detected by the characteristic data detection means is compared with each fall time data registered in the identification table in advance to obtain a difference. 10. The pulse signal receiving device according to claim 9, wherein the fall time is passed through and stored in the data storage means for each radio wave source only when there is the following difference. 13. A pulse signal receiving apparatus which receives pulse signals respectively transmitted from a plurality of radio wave transmitting sources and classifies the received pulse signals for each of the radio wave transmitting sources. Frequency conversion means for converting the received pulse signal into a predetermined frequency by the frequency conversion means, and high-speed A / D conversion means for performing time-series A / D conversion at a frequency higher than the predetermined frequency; An identification table in which at least time-series sine wave data of the received signal is registered in advance for each time, and time-series sine wave data of each received pulse signal that has been time-sequentially A / D-converted by the high-speed A / D converter. A cross-correlation is performed to determine whether or not the received pulse signal is registered in the identification table in advance. Filter means for passing the time-series envelope data only when the data is recorded, and per-source data storage means for storing, for each radio wave source, the time-series sine wave data passing through the filter means. A pulse signal receiving device characterized by the above-mentioned. 14. The high-speed A / D conversion means converts the received pulse signal, which has been converted to a predetermined frequency by the frequency conversion means, into a time series at a frequency five times or more the predetermined frequency.
14. The pulse signal receiving device according to claim 1, wherein the pulse signal is converted.