Passive radar processing method based on multi-radio-station signals

Abstract

The invention relates to the technical field of radar communication, and discloses a passive radar processing method based on multi-radio-station signals. The passive radar processing method comprises the following specific steps of: step 1, carrying out down-conversion, low-pass filtering and the like on target echo signals received by a main radar channel to extract target echo baseband signalsof each radio station; meanwhile, carrying out down-conversion, low-pass filtering and the like on a plurality of radio station direct wave signals received by a secondary radar channel to extract direct wave baseband signals of each radio station; step 2, filtering the target echo signals of each radio station obtained in the step 1 to inhibit interference signals in the target echo signals, particularly direct wave interference signals; step 3, carrying out relative processing, namely matched filtering, on the target echo signals processed in the step 2 to obtain matched output signals; andstep 4, carrying out phase compensation on the matched output signals and then performing coherent synthesis on the processed signals; and sending the processed signals into a detector for follow-up processing such as target detection and the like.

Description

technical field [0001] The invention belongs to the technical field of radar communication, in particular to a passive radar processing method based on multi-station signals. Background technique [0002] The development of stealth technology has brought unprecedented pressure to the air defense radar system. Passive radar has inherent advantages in the detection of stealth targets due to its low carrier frequency, but the existing passive radar systems generally use a single external radiation source, that is, the signal of a single radio station to detect targets, resulting in the system being able to use The signal power is limited, and the working distance and detection performance are limited. Contents of the invention [0003] Aiming at the technical problems that the passive radar in the prior art generally uses a single external radiation source to detect the target, the range of action is small and the detection performance is poor. It is necessary to provide a w...

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Problems solved by technology

[0003] Aiming at the technical problems that the passive radar in the prior art generally uses a single external radiation source to detect the target, the range of action is small and the detection performance is poor. It is necessary to provide a wireless radar that uses signals from multiple external radiation sources At the same time, in order to fully obtain the advantages of the detection signal-to-noise ratio, it is necessary to realize the coherent synthesis of multiple signals

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