预编码-TR联合峰均比抑制算法研究

Research on Precoding-TR Joint PAPR Suppression Algorithm

OFDM架构的雷达干扰一体化波形是近年来研究的热点,该类波形将探测子载波与干扰子载波分开,具有探测子载波稳定、干扰子载波灵活的结构特点,能够同时保证波形的探测性能和干扰性能,同时也具有波形峰均比较大的波形特点。本文针对OFDM架构的雷达干扰一体化波形子载波的调制特点,提出了一种预编码-TR联合峰均比抑制算法。该算法结合预编码峰均比抑制算法和TR峰均比抑制算法原理,能够在保持一体化波形探测干扰子载波能量分配方式不变的前提条件下对波形峰均比进行有效抑制。理论和仿真试验表明:本文所提出的预编码-TR联合峰均比抑制算法对一体化波形具有不失真、峰均比抑制能力强、效率高以及性能稳定的性能优点。

The integrated waveform of radar interference based on OFDM architecture is a hot research topic in recent years.This type of waveform separates the detection subcarriers from the interference subcarriers,and has the structural characteristics of stable detection subcarriers and flexible interference subcarriers which can ensure both the detection and interference performance of the waveform.Besides,this waveform has the characteristic of relatively large PA-PR.This article proposes a precoding-TR joint PAPR suppression algorithm for the modulation characteristics of this waveform subcarrier.The algorithm combines the principles of precoding PAPR suppression algorithm with TR PAPR suppression algorithm,and can effectively constrain the waveform PAPR while maintaining the energy allocation method of the integrated waveform detection and interference subcarrier unchanged.Theoretical and simulation experiments show that the precoding-TR joint PAPR suppression algorithm proposed in the article has the performance advantages of no distortion,strong PAPR suppression ability,high efficiency and stable performance for integrated waveforms.