Optimal Waveform Design Method for Radar Based on Radio Frequency Stealth in Spectrum Sharing Environment

Abstract

The present invention discloses a radar optimal waveform design method based on radio frequency stealth in a frequency spectrum shared environment, belonging to the radar design and manufacturing field. The method comprises: obtaining priori knowledge of detection area target frequency response of a radar and communication system and signals of a communication system, and assuming that the echo of the communication signals reflected through the target to the radar can be received and processed by the radar; and establishing an optimal waveform design mathematic model; and employing the Lagrange multiplier method to solve the optimal waveform design mathematic model and performing iterative computation to determine the optimal emission waveform of the radar system. The minimization of the total emission power of the radar is taken as a target, the emission waveform of the radar system is subjected to adaptive optimization design in the conditions of satisfying a certain target parameter estimation performance and the communication system channel capacity so as to ensure the channel capacity and the communication quality of the communication system and allow the radar system to ensure the optimal radio frequency stealth performance in the condition of satisfying a certain target parameter estimation performance.

Description

technical field [0001] The invention relates to a radar waveform design method, in particular to a radar optimal waveform design method based on radio frequency stealth in a spectrum sharing environment, and belongs to the field of radar design and manufacture. Background technique [0002] Radar waveform optimization design is an important means to improve the performance of radar system. Under the condition that the real frequency response of the extended target is known, there are currently two methods for radar waveform optimization design: one is the optimal detection of the target, which maximizes the output SINR (Signal-to-Interference -plus-Noise Ratio, SINR) allocates energy to the most significant mode of the target response to obtain the optimal transmission waveform for better detection of extended targets; the second is the optimal estimation of target parameters, the method passes the maximum The mutual information (Mutual Information, MI) between the radar re...

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Problems solved by technology

[0005] Although the idea of ​​radar waveform optimization design is proposed in the prior art, which improves the target detection performance and parameter estimation performance of the radar system, these methods do not consider the radar waveform optimization design based on radio frequency stealth performance

In addition, the traditional radar waveform design methods all assume that the radar system and the communication system are separated from each other in the spectrum and do not affect each other. The communication system is often in a spectrum sharing state, and the two parties will affect each other's performance

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