JPH1038999A - Pulse analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate extraction of characteristics of a complicated pulse train signal by storing characteristic information of a pulse train signal of a known transmitter and comparing this with characteristic information of an input pulse train signal for checking. SOLUTION: Transmission pulse train of various known transmitters are stored in advance for each type in a database 25. When a pulse train signal is received, a PRI/PD measurement part 21 measures pulse repetition time and pulse width of the pulse train signal. Measurement results are temporarily stored in a memory 22 as characteristic information. When the measurement results of pulse train signals during a predetermined period have been accumulated in the memory 22, a searching part 23 appropriately reads the pulse train measurement results from the memory 22 and successively compares them with pulse train of the database 25 for checking. If matching is obtained on several kinds of pulse train by this comparison and checking, the searching part 23 identifies a transmitter having matched types and outputs the results as signal classification results.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives a pulse train signal output from a transmission device such as a radar, which is a target, and measures and analyzes pulse characteristics of the signal to extract characteristics of the signal. The present invention relates to a pulse analyzer for classifying transmission devices.

[0002]

2. Description of the Related Art A conventional pulse analyzer, when classifying a transmitter such as a radar for transmitting a pulse train signal, detects the pulse train signal, extracts the characteristics of the signal from time axis information, and transmits the signal. Perform device classification.

An actual pulse analyzer comprises a PRI / PD measuring section 11 and an averaging section 12 as shown in FIG. 3, and a pulse repetition time (PRI) and a pulse width of a pulse train signal as shown in FIG. A certain number of (PD) are measured, an averaging process is performed, and a pulse repetition time and a pulse width are calculated to extract characteristics of the pulse train signal. Then, the transmission device is classified by comparing the extracted characteristics with the known characteristics of the transmission device.

However, with the advance of technology, a transmitter used in a recent radar or the like includes a pulse train (every pulse trains A, B, and B in FIG. 5) as shown in FIG.
Transmitters have come out that transmit signals that change C), signals that have different pulse repetition times for each pulse in one pulse train, and the like. Conventional pulse analyzers average the pulse repetition time and pulse width for such a complicated pulse train signal, so it is not possible to extract the characteristics of the time axis, and it is difficult to classify the devices. It is becoming.

[0005]

As described above, in the conventional pulse analyzer, it was difficult to extract the characteristics of a complicated pulse train signal. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a pulse analyzer capable of extracting a characteristic of a complicated pulse train signal and easily classifying a transmitter.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a database unit for storing characteristic information of a transmission pulse train signal of a known transmission device and constructing a database of the transmission device, and an input pulse train. A feature information measuring unit for measuring the feature information of the signal, and comparing the feature information measured by the feature information measuring unit with the feature information stored in the database unit to search for matching feature information, A search unit that outputs the apparatus as an analysis result.

The characteristic information measuring section measures at least one of a pulse repetition time and a pulse width of an input pulse train signal to obtain characteristic information. Furthermore, a memory unit is provided for temporarily storing a measurement result of the feature information measurement unit and securing a search time of the search unit.

[0008] Further, the measurement result of the characteristic information measuring section is analyzed, and when no match is obtained as a result of comparison and collation by the search section, the analysis result is classified in association with the transmitting device and stored in the database section. An analysis unit is provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a configuration of a pulse analyzer according to the present invention. A pulse train signal detected by a receiver (not shown) is converted into a PRI / PD measuring unit 2.
1 is supplied. The PRI / PD measuring section 21 measures the pulse repetition time and pulse width of the input pulse train signal, and the measurement results obtained here are temporarily stored in the memory section 22 and are appropriately transmitted to the searching section 23 and the analyzing section 24. Supplied.

Further, the present apparatus is provided with a database unit 25 for constructing a database of pulse trains of the transmitting apparatus whose characteristics of the pulse trains are known. The search unit 23
The pulse train feature data of the pulse train signal stored in the memory unit 22 is compared with the feature data of the known pulse train stored in the database unit 25, and the matching pulse train is searched to classify the signal. The analysis unit 24 analyzes the pulse train signal when the search unit 23 cannot classify the signal, and adds the pulse train obtained from the analysis result to the database unit 25.

In the above configuration, the operation of the present apparatus will be described with reference to FIG. First, for the database unit 25,
As shown in FIG. 2B in advance, known transmitting devices A, B,
... (for example, onboard equipment such as a jet aircraft and a helicopter) stores a pulse train transmitted by type. Here, when a pulse train signal as shown in FIG.
The RI / PD measuring unit 21 measures the pulse repetition time and pulse width of the pulse train signal. The measurement result is temporarily stored in the memory unit 22 as feature information.

When the measurement result of the pulse train signal for a certain period is accumulated in the memory unit 22, the search unit 23 reads out the pulse train measurement result from the memory unit 22 as appropriate, and the database unit 25
Are sequentially compared and collated with the pulse train registered in. FIG. 2 conceptually shows the state of the comparison and collation.

When a match is obtained for several types of pulse trains by the comparison and collation, the search unit 23 determines the transmitting device having the matched type, and outputs the result as a signal classification result. In FIG. 2, since the type 1, type 2, and type 3 matches of the device A are obtained, the fact that the transmitting device emitting the input pulse train signal is the device A is output as the signal classification result.

If there is no match in any of the pulse trains in the search unit 23, the analysis unit 24 stores the feature information stored in the memory unit 22 in the database unit 25 for each type, To make it available for the next comparison / matching.

Therefore, the pulse analyzer having the above-described configuration cannot classify a transmission device for an unknown pulse train signal, but can classify a transmission device for a known pulse train signal even in the case of a complicated pulse train signal. Becomes

[0016]

As described above, according to the present invention, it is possible to provide a pulse analyzer which can extract the characteristics of a complicated pulse train signal and can easily classify the transmitter.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a pulse analyzer according to the present invention.

FIG. 2 is an exemplary conceptual diagram for explaining the processing contents of comparison and collation in the embodiment.

FIG. 3 is a block diagram showing a configuration of a conventional pulse analyzer.

FIG. 4 is a timing waveform chart for explaining a pulse train analysis method of the conventional device.

FIG. 5 is a timing waveform chart for explaining a disadvantage of the pulse train analysis method of the conventional device.

[Explanation of symbols]

 21 PRI / PD measurement unit 22 memory unit 23 search unit 24 analysis unit 25 database unit

Claims (4)

[Claims] 1. A database section for storing characteristic information of a transmission pulse train signal of a known transmission apparatus in advance and constructing a database of the transmission apparatus; a characteristic information measuring section for measuring characteristic information of an input pulse train signal; A search unit that compares the feature information measured by the measurement unit with the feature information stored in the database unit, searches for matching feature information, and outputs a corresponding transmitting device as an analysis result. Pulse analyzer. 2. The pulse analyzer according to claim 1, wherein the characteristic information measuring section measures at least one of a pulse repetition time and a pulse width of the input pulse train signal to obtain characteristic information. 3. The pulse analyzer according to claim 1, further comprising a memory unit for temporarily storing a measurement result of said characteristic information measurement unit and securing a search time of said search unit. 4. The apparatus according to claim 1, further comprising: analyzing the measurement result of said characteristic information measuring section; and, if no match is obtained as a result of the comparison and collation by said search section, classifies the analysis result in association with a transmitting device; The pulse analysis device according to claim 1, further comprising an analysis unit that stores the data.