基于零阶椭圆球面波信号的连续相位调制及性能分析  

Continuous phase modulation based on zero order PSWF signal and its performance analysis

作　　者：杨大伟 王红星[1] 刘传辉 康家方 YANG Dawei;WANG Hongxing;LIU Chuanhui;KANG Jiafang(Department of Aeronautical Communication,Naval Aviation University,Yantai 264001,China;Unit 91439 of the PLA,Dalian 116041,China)

机构地区：[1]海军航空大学航空通信教研室,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8期2311-2320,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61701518);山东省“泰山学者”建设工程专项经费基金(ts20081130)资助课题。

摘　　要：连续相位调制技术在卫星通信、深空探测、遥感遥测等航空航天领域具有重要应用,连续相位调制信号的性能通常取决于其基带调频脉冲信号。零阶椭圆球面波信号是时频域高能量聚集性信号,且该信号的时间带宽积可以灵活控制。结合连续相位调制原理,探索性地将零阶椭圆球面波信号应用于连续相位调制,与现有主要连续相位调制信号性能进行了对比分析。结果表明,与基于矩形脉冲、升余弦脉冲的连续相位调制最小频移键控信号、正弦频移键控信号相比,该方法所得调制信号的功率谱带外衰减和高频滚降可以更快,在含99.9%信号功率带宽条件下,系统频带利用率可分别提升13%和16%,且在全响应条件下系统的误比特率性能较好。Continuous phase modulation(CPM)technology has important applications in aerospace fields such as satellite communications,deep space exploration,remote sensing and telemetry,the performance of CPM signal often depends on its baseband frequency modulation pulse signal.The zero order prolate spheroidal wave functions(PSWFs)signal is a time-frequency high-energy aggregation signal,and its time bandwidth product can be flexibly controlled.Combined with the principle of CPM,the zero order PSWF signal is applied to CPM,and the performance is compared with existing main CPM signals.The results show that,compared with the existing CPM minimum shift keying(MSK)signal and sinusoidal frequency shift keying(SFSK)signal based on rectangular pulses and raised cosine pulses,the power spectrum attenuation and high frequency roll-off of the modulation signal obtained by this method can be more fast,with 99.9%signal power bandwidth,the system bandwidth efficiency can be improved by 13%and 16%,respectively.And under the condition of full response,the system has better bit error rate(BER)performance.

关 键 词：零阶椭圆球面波信号 连续相位调制 频带利用率 

分 类 号：TN914.3[电子电信—通信与信息系统]