航海雷达通信一体化信号峰均比抑制  

PAPR suppression of marine radar and communication integration signals

作　　者：应士君[1] 张东阳 YING Shijun;ZHANG Dongyang(Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学商船学院,上海201306

出　　处：《上海海事大学学报》2023年第2期25-29,共5页Journal of Shanghai Maritime University

基　　金：上海市科技创新计划(20DZ2252300)。

摘　　要：为解决基于正交频分复用(orthogonal frequency division multiplexing,OFDM)的雷达通信一体化信号中固有的峰均比(peak-to-average power ratio,PAPR)较高的问题,将OFDM信号数据块结合P4码进行系数加权,提出一种改进的选择映射(selected mapping,SLM)算法(记为PSLM算法)。该算法对信号分组形成OFDM信号数据块,生成与数据块数量相等的P4码,将其量化后移位形成具有若干列的相位旋转因子矩阵。利用该矩阵对每个数据块中的信号进行加权后再进行逆快速傅里叶变换,选择PAPR最低的信号通过雷达发射端发射出去。仿真结果表明,该算法在降低计算复杂度的同时可以实现PAPR抑制,且采用该算法后的一体化信号具有类似图钉形的模糊函数。In order to solve the problem of the high peak-to-average power ratio(PAPR)in radar and communication integration signals based on the orthogonal frequency division multiplexing(OFDM),OFDM signal data blocks are weighted with P4 code,an improved selected mapping(SLM)algorithm,called PSLM algorithm,is proposed.The algorithm groups signals to form OFDM signal data blocks,and generates P4 codes,and the number of P4 codes is equal to the number of data blocks;after quantization of P4 codes,it is shifted to form a phase rotation factor matrix with several columns.The signal in each data block is weighted by the matrix before performing the inverse fast Fourier transform,and the signal with the lowest PAPR is selected and transmitted through the radar transmitter.Simulation results show that,the algorithm not only reduces the computational complexity,but also supresses PAPR,and the integration signal using the algorithm is of the fuzzy function similar to the thumbtack shape.

关 键 词：雷达通信一体化 P4码 峰均比(PAPR) 

分 类 号：U666.14[交通运输工程—船舶及航道工程]