多载波PSWFs-CPM联合调制信号设计与分析  

Design and analysis of multi-carriers PSWFs-CPM joint modulation signal

作　　者：杨大伟 王红星[1] 张磊 刘传辉 康家方 YANG Dawei;WANG Hongxing;ZHANG Lei;LIU Chuanhui;KANG Jiafang(Naval Aviation University,Yantai 264001,China;Unit 91349 of the PLA,Dalian 116041,China)

机构地区：[1]海军航空大学,山东烟台264001 [2]中国人民解放军91439部队,辽宁大连116041

出　　处：《系统工程与电子技术》2021年第10期3000-3007,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61701518)资助课题。

摘　　要：连续相位调制(continuous phase modulation,CPM)信号具有恒包络、较高功率效率等优势,基于椭圆球面波函数(prolate spheroidal wave functions,PSWFs)信号多载波调制解调系统具有较高频带利用率。结合CPM技术和基于PSWFs信号的多载波调制方法,提出一种基于PSWFs信号的多载波调制与CPM联合调制信号(multi-carriers modulation based on PSWFs with CPM,MCM-PSWFs-CPM)模型,对该信号的功率谱特性、峰均功率比、误码率性能等进行了分析。仿真结果表明,相比现有基于PSWFs的多载波调制解调系统,该模型所得信号功率谱带外衰减可以相对较快,当载波数为64、互补累计分布函数(complementary cumulative distribution function,CCDF)为10-3时,可有效降低峰均功率比值约2.70dB,采用多符号周期检测方法,可以获得较好的解调增益,且符号数越大,检测性能越好,但是检测复杂度也会相应增加。Continuous phase modulation(CPM)signal has the advantages of constant envelope characteristics,higher power efficiency,etc.,and the multi-carries modulation and demodulation system based on the prolate spheroidal wave functions(PSWFs)signal has high spectral efficiency.Combining CPM technology and multi-carriers modulation method based on PSWFs signal,a signal model of multi-carriers modulation based on PSWFs with CPM(MCM-PSWFs-CPM)model is proposed.The power spectral density(PSD)characteristics,peak to average power ratio(PAPR),and bit error ratio(BER)performance of the signal are analyzed.The simulation results show that compared with the existing PSWFs-based multi-carriers modulation and demodulation system,the out-of-band attenuation of the signal power spectrum obtained by this model relatively faster,when the number of carriers is 64 and the complementary cumulative distribution function(CCDF)is 10-3,the PAPR can be effectively reduced by about 2.70 dB,using multi-symbol detection(MSD)method can obtain better demodulation gain,and as the number of symbols increases,the detection performance is better,but the detection complexity will increase accordingly.

关 键 词：椭圆球面波函数 连续相位调制 联合调制 峰均功率比 

分 类 号：TN914.3[电子电信—通信与信息系统]