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Simulation method for object detection of pulse system radar in microwave anechoic chamber

A technology of radar targets and microwave anechoic chambers, which is applied in radio wave measurement systems, measurement devices, radio wave reflection/reradiation, etc., and can solve problems such as difficult to achieve effective echo reception

Active Publication Date: 2017-06-30
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0003] Usually, the environment of the microwave anechoic room is limited, and the distance between the radar and the target is relatively close. If the pulse signal is used for target detection, in the simultaneous mode of transmitting and receiving, the transmitting signal and the receiving signal will generate mutual coupling at the receiving antenna; The target echo will return before the transmitted signal is completely radiated, and it is difficult to achieve effective reception of the echo

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  • Simulation method for object detection of pulse system radar in microwave anechoic chamber

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Embodiment Construction

[0071] The present invention will be further described below in conjunction with the accompanying drawings. A pulse system radar target detection simulation method in a microwave anechoic chamber of the present invention, such as figure 2 As shown, the steps are as follows:

[0072] The first step is to use the intermittent sending and receiving method to obtain target echo signals.

[0073] In the mode of intermittent transmission and reception, the alternate work process of transmission and reception can be abstracted as a square wave signal p(t) to control the radar pulse signal, p(t) can be expressed as

[0074]

[0075] Where τ is the working period of the transmitting channel, T s is the intermittent sending and receiving cycle, δ(·) is the unit shock function, and n represents the nth shock pulse function.

[0076] Using the property of Fourier transform, the frequency domain form of p(t) is

[0077]

[0078] Among them, f s =1 / T s , sinc(x)=sin(πx) / (πx). ...

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Abstract

The invention discloses a simulation method for object detection of pulse system radar in a microwave anechoic chamber. The method comprises the following steps: in a first step, an intermittent transmitting and receiving mode is used for obtaining object echo signals; in a second step, the object echo is recovered; in a third step, pulse compression is performed and object information is obtained; in a fourth step, information reconstruction is achieved via energy compensation of the object echo. The beneficial effects of the simulation method disclosed in the invention are that firstly, a received and transmitted signal coupling problem of a radar transmitting and receiving time-sharing mode in the microwave anechoic chamber and a problem of blocking of received and transmitted signals in a simultaneous transmitting and receiving mode can be solved; secondly, problem of time domain wave shape recovery of the object echo is solved; thirdly, object information can be obtained accurately; fourthly accurate object echo energy compensation and information reconstruction results can be achieved.

Description

【Technical field】 [0001] The invention discloses a method for detecting and simulating a pulse-system radar target in a microwave anechoic chamber, which belongs to the field of simulation of radar electronic countermeasures, and specifically relates to a technology for transmitting and receiving processing of a pulse-system radar signal simulated in a microwave anechoic chamber, in particular to realize a pulse-system radar target in a microwave anechoic chamber Simulation and signal recovery methods for the entire detection process. 【Background technique】 [0002] Radar simulation in microwave anechoic chamber has the advantages of strong operability, high repeatability, good confidentiality and low cost. Due to the limited space in the microwave anechoic chamber, in the measurement of static radar target characteristics, the impulse pulse or continuous wave frequency sweep excitation method has become the main measurement method, and provides a large amount of simulation ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/292G01S7/36G01S7/40G01S13/02
Inventor 赵锋刘晓斌刘进艾小锋杨建华冯德军李永祯欧健吴其华王俊杰尹艳娟
Owner NAT UNIV OF DEFENSE TECH
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