Method and system for solving same-frequency interference of frequency sweeping rada

Abstract

The invention discloses a method for solving same-frequency interference of frequency-sweeping radars. The method comprises the following steps: setting different beam position sequences for each frequency-sweeping radars; the starting time of the frequency sweeping radars is kept consistent; each frequency-sweeping radars carries out signal emission according to the corresponding beam position sequence and receives corresponding echo signals, trace point detection is carried out according to the received echo signals, and the detected trace points are sent to the data processing unit; and the data processing unit monitors the wave position mark number of the trace point detected by each frequency-sweeping rada, and if the difference value of the wave position mark numbers of two trace points is smaller than or equal to a set threshold value at the same moment, the frequency-sweeping rada is synchronously started again. According to the method, different wave position sequences are set for the frequency-sweeping radars, so that the wave position labels of the frequency-sweeping radars at the same moment are inconsistent, namely, the frequencies of the transmitted signals are different, radar echo signals are prevented from entering receiving channels of the opposite sides in a crossing manner, the problem of same-frequency interference is solved, and the detection performance of the frequency-sweeping radars is improved.

Description

technical field [0001] The invention relates to the technical field of frequency-sweeping radars, in particular to a method and system for solving co-frequency interference of frequency-sweeping radars. Background technique [0002] In recent years, with the continuous development and popularization of radar technology, frequency-scanning surface surveillance radar products have been gradually applied in the field of border and coastal defense because of their high cost performance. The radar system changes the beam direction by changing the frequency of the transmitted signal to scan the surveillance area, thereby achieving the detection and tracking of moving targets. Each frequency hopping step of the frequency sweep radar represents a beam pointing. According to the range of the sector sweep angle and the angular resolution, the frequency sweep radar will have dozens or hundreds of frequency hopping points. At each frequency hopping point, a beam will be emitted. Multip...

AI Technical Summary

Problems solved by technology

However, when multiple frequency-scanning radars are powered on at the same time with no difference, the radar echo signals will cross into the receiving channel of the other party, resulting in co-channel interference, which seriously affects the detection performance of the frequency-sweeping radar.

If, one of the frequency-sweep radar receiving channel local oscillator signal and the intermediate frequency signal mixed with the same-frequency interference signal just falls within the baseband bandwidth of the radar receiver, the radar signal processing module will regard the same-frequency interference signal as real The target is processed, so that false targets are detected. When the frequency sweep radar is actually working, many false targets will be generated on the display interface of the host computer, and false points and tracks will be formed later, which will affect the actual observation effect.

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