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Signal source system and method of realizing short range simulation echo by means of photoelectric conversion

A technology of photoelectric conversion and photoelectric converter, which is applied in the direction of radio wave measurement systems, measuring devices, instruments, etc., can solve the problems that are not suitable for short-range ranging radar systems, and achieve light weight, simple and convenient engineering application, and small volume Effect

Inactive Publication Date: 2018-05-18
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0004] In the prior art, there are many methods for simulating echoes in radar systems, but none of them are suitable for short-range ranging radar systems with complex modulation forms under short-range conditions.

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  • Signal source system and method of realizing short range simulation echo by means of photoelectric conversion
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  • Signal source system and method of realizing short range simulation echo by means of photoelectric conversion

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Embodiment Construction

[0031] The following combination Figure 1 ~ Figure 3 , the technical content, structural features, achieved goals and effects of the present invention will be described in detail through preferred embodiments.

[0032] The current short range radar system usually adopts chirp pulse (or frequency modulated continuous wave) working system. The analytical expression of the rectangular pulse signal of LFM (Linear Frequency Modulation Pulse) is:

[0033]

[0034] Among them, Arect(t / T) is the signal envelope, T is the pulse width, f 0 Is the carrier frequency, and k is the FM slope.

[0035] The point target echo of the short range radar system is:

[0036]

[0037] Among them, Brect[(t-τ) / T] is the signal envelope, τ is the delay time, f 0 Is the carrier frequency, and k is the FM slope.

[0038] From the analytical expression of the above-mentioned rectangular pulse signal, it is completely feasible to modulate the radio frequency signal into an optical signal, genera...

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Abstract

The invention relates to a signal source system and method of realizing short range simulation echo by means of photoelectric conversion. The signal source method of realizing short range simulation echo by means of photoelectric conversion includes the steps: S1, a program control attenuator receives a radiofrequency signal output from a short-range ranging radar system, performs quantitative attenuation, and adjusts the radiofrequency signal power to the range supported by a photoelectric converter; S2, the photoelectric converter converts the attenuated radiofrequency signal into an opticalsignal and performs time delay, and then converts the optical signal after time delay into an echo radiofrequency signal; and S3, the program control attenuator can perform quantitative attenuation on the echo radiofrequency signal, and sends the echo radiofrequency signal to the short-range ranging radar system, wherein a central processing unit switches and controls signal conversion of the photoelectric converter, and performs quantitative control on the amount of attenuation of the program control attenuator. The signal source system and method of realizing short range simulation echo bymeans of photoelectric conversion can be applied to a closed loop test of the short-range ranging radar system of each frequency range, can calibrate the detection sensitivity and the detection rangeof the short-range ranging radar system at the same time, and can provide a target simulation echo of the large bandwidth short-range ranging radar system.

Description

technical field [0001] The invention relates to a signal source system and method for simulating echoes of a radar system, in particular to a signal source system and method for realizing close-range simulating echoes of a radar system by means of photoelectric conversion, and belongs to the technical field of radar system testing. Background technique [0002] The short-range radar system is generally a miniaturized radar system, which is suitable for short-range and high-precision target detection in complex environments, so as to achieve precise strikes. [0003] At present, the application of short range radar system has become more and more extensive. Compared with other range-finding radar systems, the structure of short-range range-finding radar systems is more complex, often a combination of multiple systems. For example, the compound echo characteristics such as narrow pulse and frequency modulation are used to perform high-precision ranging and reduce clutter inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4017G01S7/4052G01S7/4069
Inventor 钟馥鸾韩永金黄怡丁霞邓若汉
Owner SHANGHAI RADIO EQUIP RES INST
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