Radar interference recognition signal processing system
A technology for identifying signal and radar interference, applied in radio wave measurement systems, instruments, etc., can solve the problem of difficult to identify real targets, achieve good anti-interference performance, simple and reliable circuits, and increase the effect of spectrum distribution
Active Publication Date: 2017-07-04
10TH RES INST OF CETC
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The principle of the DRFM-based deception jammer shows that the deception jamming signal generated by it has a strong coherence with the real echo, making it difficult for the radar to identify the real target using conventional detection methods
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[0023] refer to figure 1 . In the embodiment described below, a radar interference identification signal processing system includes: receiving antenna A, receiving antenna B, frequency modulation continuous wave FMCW radar radio frequency circuit and FMCW radar signal processing circuit, characterized in that: in the above signal processing circuit , the waveform generator sends the generated modulation signal to the voltage-controlled oscillator to modulate to the microwave frequency band, and the output frequency is f r The signal is divided into two channels, and one channel is amplified by M times of frequency multiplication through the frequency multiplication amplifier circuit A to M×f r A part of the frequency signal is transmitted through the transmitting antenna A, and part of it is input into the down-conversion circuit A as the local oscillator signal of the down-conversion circuit A; the frequency received by the receiving antenna A is M×f r +M×f b +M×f d After...
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The invention discloses a radar interference recognition signal processing system, and aims to provide a processing system which is simple and reliable in circuit and high in interference resistance. The radar interference recognition signal processing system is implemented according to the following technical scheme: in the signal processing circuit, a waveform generator sends generated modulation signals to a voltage-controlled oscillator, signals with the output frequency being fr are divided into two paths, one path of the signals are subjected to M times of frequency doubling amplification through a frequency doubling amplification circuit A and turned into signals with the frequency being M*fr, one part of the signals are transmitted through a transmitting antenna A, and another part of the signals are inputted into a down-conversion circuit A to act as local oscillation signals of the down-conversion circuit A; and the other path of the signals is subjected to frequency division of a frequency dividing circuit and turned into signals with the frequency being fr/L, one part of the signals are subjected to frequency doubling amplification of a frequency doubling amplification circuit B and turned into frequency doubling amplification signals which are transmitted through a transmitting antenna B, and another part of the signals are inputted into a down-conversion circuit B to act local oscillation signals of the down-conversion circuit B. Intermediate-frequency signals A and intermediate-frequency signals B are respectively subjected to interface recognition circuit down-conversion filtering, FFT (Fast Fourier Transform), non-coherence accumulation and threshold judgment, and interference recognition judgment signals are outputted.
Description
technical field [0001] The invention relates to a radar signal processing system mainly related to interference identification of dual frequency band signal matching. Background technique [0002] Radar signal processing and data processing technology is the nerve center of radar. Radar's discrimination and recognition of various targets is mainly realized through the radar signal processing system. Signal processing finds the target and measures the coordinates and speed of the target through the processing of the radar echo signal to form the target track, and the data processing forms the track of the target through the processing of the target track for command decision-making. Due to the wide application of electronic information systems in the information age, electromagnetic wave interference is ubiquitous. With the development of radar technology, radars are faced with increasingly complex electromagnetic environments and increasingly severe man-made active and pass...
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IPC IPC(8): G01S7/36G01S7/41
CPCG01S7/36G01S7/41
Inventor 邓鹤栖黄建
Owner 10TH RES INST OF CETC
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