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frequency agility MTI radar speed measurement method

A technology of radar speed measurement and frequency agility, which is applied in the direction of measuring devices, radio wave measurement systems, instruments, etc., can solve the problems of redundant waveform energy loss and weak anti-interference ability, and achieve overcoming serious loss, strong anti-interference ability, Overcoming the effect of weak electronic countermeasures

Active Publication Date: 2020-04-10
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a frequency-agile MTI radar speed measurement method, which overcomes the disadvantages of weak anti-jamming capability of the MTI radar and serious energy loss of transmitting redundant waveforms in the prior art

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] The present invention utilizes the technology of simultaneously dual-channel transmitting and receiving signals of different frequencies, which not only effectively improves the performance of target detection and speed measurement, but also improves the comprehensive anti-jamming capability, providing a powerful technical support.

[0055] The invention proposes a frequency-agile MTI radar speed measurement method, which can not only effectively detect the speed of the target, but also significantly improve the detection performance and comprehensive anti-interference ability of the radar, laying a technical foundation for improving the comprehensive detection ability of the radar in the defense zone .

[0056] refer to figure 1 , is a functional block diagram of a frequency-agile MTI radar system structure and speed measurement method of the ...

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Abstract

The invention provides a frequency agility MTI radar speed measurement method, which utilizes double transmitting and receiving channels to simultaneously transmit and receive signals with different frequencies, then performs signal-level fusion on the signals of the two channels through signal processing so as to improve the detection performance, and meanwhile carries out speed calculation by utilizing signal phase information of the two receiving channels without additionally transmitting redundant waveforms for speed ambiguity calculation. According to the frequency agility MTI radar speedmeasurement method, simultaneous dual-frequency transmission is adopted, so that the probability that a reconnaissance receiver intercepts a radar transmitting signal is reduced; and meanwhile, narrowband aiming type interference can be effectively resisted by double-frequency reception; the defect of weak electronic countermeasure capability in an existing MTI radar is overcome, target detectionis realized by adopting dual-channel signal level fusion, velocity ambiguity resolution is realized without redundant waveforms, the defect of serious energy loss caused by transmitting the redundantwaveforms in the prior art is overcome, and the comprehensive detection performance of the target is effectively improved.

Description

technical field [0001] The invention relates to the technical field of radar target detection, in particular to a frequency agility MTI radar system structure and a speed measurement method. Background technique [0002] The tasks faced by modern radars are increasingly complex. In order to improve the detection performance of radars in complex and changeable environments, many advanced theories and methods have been proposed, and clutter suppression technology is one of the key technologies. The moving target display technology is one of the earliest technologies used to suppress clutter, which uses the Doppler frequency shift of the moving target echo signal to distinguish between fixed targets and moving targets. Low repetition frequency MTI radar increases the transmission energy by emitting long pulse width. In theory, if the duty cycle and total time are the same, the detection power of different repetition frequency radars is the same, because the average power and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58G01S7/36G01S7/41G01S7/02G01S13/00
CPCG01S13/581G01S7/36G01S7/414G01S7/415G01S7/418G01S7/023G01S13/006
Inventor 安政帅
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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