第44卷第2期2023年6月D0I:10.13340/j.jsmu.2023.02.005上海海事大学学报JournalofShanghaiMaritimeUniversityVol.44No.2Jun.2023文章编号：1672-9498(2023)02-0025-05航海雷达通信一体化信号峰均比抑制应士君，张东阳（上海海事大学商船学院，上海201306）摘要：为解决基于正交频分复用（orthogonalfrequencydivisionmultiplexing，OFDM）的雷达通信一体化信号中固有的峰均比（peak-to-averagepowerratio，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（selectedmapping，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。关键词：雷达通信一体化；P4码；峰均比（PAPR)中图分类号：U666.14PAPRsuppressionofmarineradarandcommunication文献标志码：AintegrationsignalsYINGShijun,ZHANGDongyang(MerchantMarineCollege,ShanghaiMaritimeUniversity,Shanghai201306,China)Abstract:Inordertosolvetheproblemofthehighpeak-to-averagepowerratio(PAPR)inradarandcommunicationintegrationsignalsbasedontheorthogonalfrequencydivisionmultiplexing(OFDM),OFDMsignaldatablocksareweightedwithP4code,animprovedselectedmapping(SLM)algorithm,calledPSLMalgorithm,isproposed.ThealgorithmgroupssignalstoformOFDMsignaldatablocks,andgeneratesP4codes,andthenumberofP4codesisequaltothenumberofdatablocks;afterquantizationofP4codes,itisshiftedtoformaphaserotationfactormatrixwithseveralcolumns.ThesignalineachdatablockisweightedbythematrixbeforeperformingtheinversefastFouriertransform,andthesignalwiththelowestPAPRisselectedandtransmittedthroughtheradartransmitter.Simulationresultsshowthat,thealgorithmnotonlyreducesthecomputationalcomplexity,butalsosupressesPAPR,andtheintegrationsignalusingthealgorithmisofthefuzzyfunctionsimilartothethumbtackshape.Keywords:integrationofradarandcommunication;P4code;peak-to-averagepowerratio(PA...
