基于PSWFs的非正弦通信系统正交多址接入技术研究  

Research on the Orthogonal Multiple Access Technology of Non-sinusoidal Communication System Based on PSWFs

作　　者：杨璐铖 王红星 陆发平 刘传辉 康家方 YANG Lucheng;WANG Hongxing;LU Faping;LIU Chuanhui;KANG Jiafang(Naval Aviation University,Yantai 264001,China;Key Laboratory on Signal and Information Processing of Shandong Province,Yantai 264001,China;Unit 91033 of PLA,Qingdao 266000,China)

机构地区：[1]海军航空大学,山东烟台264001 [2]山东省信号与信息处理重点实验室,山东烟台264001 [3]中国人民解放军91033部队,山东青岛266000

出　　处：《无线电通信技术》2021年第1期86-95,共10页Radio Communications Technology

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

摘　　要：针对椭圆球面波函数(PSWFs)非正弦通信系统多个用户如何共享时频资源进行通信的问题,展开基于PSWFs的非正弦通信系统正交多址接入技术研究。首先,基于PSWFs的信号特性,提出了PSWFs非正弦通信系统频分多址(PSWFs-FDMA)、时分多址(PSWFs-TDMA)和阶分多址接入(PSWFs-ODMA)方法。其次,与循环前缀正交频分复用(CP-OFDM)对比分析了调制信号的能量聚集性、频谱效率和相邻子波带间的干扰,证明所提正交多址技术的可行性。最后,在双选择信道下,将PSWFs-TDMA/FDMA、PSWFs-ODMA与CP-OFDM对比分析了系统吞吐量,与正交频分多址接入(OFDMA)对比了不同接入方式的误码性能。理论与仿真分析表明,PSWFs非正弦通信系统正交多址能够比CP-OFDM通信系统提高约1.4倍的系统吞吐量。在多径信道下,PSWFs-ODMA增加时宽情况下的误码性能最好;在双选择信道,多普勒频移较小的中低速场景下,PSWFs-TDMA/FDMA的误码性能比OFDMA要好。Aiming at the problem of how multiple users of the non-sinusoidal communication system based on Prolate Spheroidal Wave Functions(PSWFs)share time-frequency resources for communication,the research on orthogonal multi-access technology of the non-sinusoidal communication system based on PSWFs is carried out.Firstly,based on the signal characteristics of PSWFs,the technologies of PSWFs-Frequency Division Multiple Access(PSWFs-FDMA),PSWFs-Time Division Multiple Access(PSWFs-TD⁃MA),and PSWFs-Order Division Multiple Access(PSWFs-ODMA)for the non-sinusoidal communication system based on PSWFs are proposed.Secondly,the energy aggregation,spectral efficiency and interference between adjacent wavelet bands of modulated sig⁃nals are compared with Cyclic Prefix-Orthogonal Frequency Division Multiplexing(CP-OFDM)to prove the feasibility of the proposed orthogonal multiple access technologies.Finally,under the dual-choice channel,the system throughput of PSWFs-TDMA/FDMA,PSWFs-ODMA and CP-OFDM are compared,the error performance of different orthogonal access methods and Orthogonal Frequency Division Multiple Access(OFDMA)are compared.Theory and simulation analysis show that the orthogonal multiple access of the nonsinusoidal communication system based on PSWFs compared to CP-OFDM communication system can improve the system throughput by about 1.4 times.In the case of multi-path channel,PSWFs-ODMA has the best error performance when the width is increased,in the case of medium and low speed scenarios with dual-choice channel and small Doppler frequency shift,PSWFS-TDMA/FDMA have better error performance than OFDMA.

关 键 词：椭圆球面波函数 正交多址接入 频谱动态共享 系统吞吐量 

分 类 号：TN914.5[电子电信—通信与信息系统]