Cognitive radar waveform designing method based on interference and side-lobe equilibrium suppression

Abstract

The invention discloses a cognitive radar waveform designing method based on interference and side-lobe equilibrium suppression. The method comprises: on the basis of a self-adaptive framework, in a noise suppressing interference model, and through the MMSE criteria, introducing and structuring a cognitive radar waveform optimization model of interference and side-lobe equilibrium suppression; converting the model into a minimized multivariable and multi-constrained objective function model; then according to Lagrange multiplier method, developing the Lagrange function of the objective function, and according to the principle of duality, converting the model into the optimized dual function again, solved with the introduction of auxiliary variables and the KKT optimality; and finally, designing the alternating iterative method to combine with the optimized emission shape and the filter sequence; and estimating the evaluation of performance brought about by the comprehensive processing algorithm. The simulation results show that the proposed algorithm can realize the balance of the interfering signal suppression and the self-processing side-lobe, which improves the detection performance of the target.

Description

technical field [0001] The invention relates to a cognitive radar waveform design method based on interference and sidelobe equalization suppression, in particular to a low-complexity method of transmitting waveforms and data processing for optimizing radar working performance, and belongs to the technical field of radar anti-jamming. Background technique [0002] Radar jamming refers to all tactics and technical measures that destroy and disrupt the normal operation of radar and related equipment. According to the mechanism of jamming signals, it can be divided into suppressive jamming and deceptive jamming. Among them, suppressive noise jamming is an important jamming method of the current radar jamming system. It mainly floods the target echo with high-power noise, making the radar unable to detect the target and greatly reducing the working performance of the warning detection radar. The purpose of radar anti-interference is to weaken the various interference signals tha...

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Problems solved by technology

[0003] Traditional radar only relies on signal processing technology at the receiving end, which has a limited degree of improvement in radar interference suppression performance; cognitive radar, as a new type of intelligent radar system, has the greatest advantage in adaptively changing the emission after obtaining environmental interaction information. Related performance improvements are most likely

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