Low-intercept radar signal design method based on multi-time coding phase modulation

Abstract

The invention discloses a low-intercept radar signal design method based on multi-time coding phase modulation, and particularly relates to a radar waveform design method with excellent resolution performance, anti-interference performance and low-intercept performance. Multi-time coding is approximated by a frequency modulation signal, the number of phase states can be manually controlled, and the duration of each phase state is different. The method comprises the following steps: firstly, selecting a frequency modulation basic signal waveform; approximating the frequency modulation signal according to a multi-time coding rule to obtain a multi-time coding phase; carrying out frequency coding modulation on each phase; and finally, obtaining a low-interception radar signal waveform with complex modulation. By adopting different frequency modulation forms in the obtained multi-time coding phase sub-pulses, various low-interception radar signal waveforms with complex modulation can be obtained. The obtained signal waveform has good resolution performance, anti-interference performance and low-interception performance, and can meet the requirements of modern war complex electromagnetic environment for radar signal waveform low-interception performance.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and further relates to a design method for low-interception radar signal waveforms in the field of electronic countermeasures. The designed low intercept radar waveform has excellent resolution performance, anti-jamming performance and low intercept performance. Background technique [0002] With the development of science and technology, the electromagnetic environment of modern warfare is becoming more and more complex, and the scenarios of radar applications are also becoming more and more complex. The rapid development of signal processing technology has brought new challenges to the stealth of radar signals. Radar signal waveforms with low interception performance are used in modern The status of the field of electronic countermeasures is becoming more and more important. How to design a waveform with good low interception performance under the premise of ensuring that the radar signal...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the modulation form of the chirp signal is too single, and it is easier to be sorted and identified by the intercept receiver to obtain the parameters of the signal waveform

However, the disadvantage of this method is that the communication information is encoded and transmitted through the linear frequency modulation baseband signal. Although it has a certain low interception performance, the modulation form is still relatively simple, and the obtained signal waveform has limited anti-interference performance and low interception performance.

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