A Layer Suppression Method of Radar Synchronous-frequency Asynchronous Interference Video Signal Layer

Abstract

The invention provides a processing method of radar co-frequency asynchronous interference video signals. The echo amplitude in each azimuth is endowed with a weight coefficient, namely, different weight coefficients are used to adjust correlations between different pulses and a present pulse, and the problem of a relatively large error of a present sampling point is overcome. The average of every N azimuth echo amplitudes endowed with the weight coefficients is calculated, the calculated average value is endowed with a protection factor, the protection factor is used to protect the echo amplitude in the original azimuth and further to prevent original data from modification to the largest degree while removing the co-frequency asynchronous interference signals, and accurate basis is provided for subsequent data processing of the radar signals. In the processing process, the quantity of pulses can be adjusted properly according to whether adjacent pulses occur in the co-frequency asynchronous interference signals and whether the adjacent pulses include an interfering distance overlap condition, and problems in processing interference signals of different densities can be solved.

Description

technical field [0001] The present invention relates to the technical field of radar communication, and more specifically, to a method for processing radar co-frequency and asynchronous interference video signals and a radar co-frequency and asynchronous interference video signal layer suppression method. Background technique [0002] At present, since navigation radars are widely used on various types of ships, the frequency bands are mostly concentrated near the X-band, and the transmission frequencies are relatively close. In addition, when ships sail in formation and a large number of fishing boats go out to sea together for fishing, etc., co-frequency interference is more likely to occur. In addition, with the development of radar technology, more and more solid-state navigation radars are used. Since its peak power is difficult to reach a high level, in order to ensure its detection power, it is necessary to increase the emission pulse width appropriately to improve the...

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Problems solved by technology

[0007] The invention provides a method for processing radar co-frequency and asynchronous interference video signals to solve the defects of easy tampering of non-interference radar clutter data, poor suppression ability and large error in the existing co-frequency and asynchronous interference signal suppression process, and provides A radar co-frequency and asynchronous interference video signal layer suppression method, by using the above-mentioned processing method for suppressing radar co-frequency and asynchronous interference video signals, to solve the problem that existing radar co-frequency and asynchronous interference video signals tend to generate more residual interference signals during processing Defects

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