空间光通信中MIMO-FBMC系统误码率分析  

Analysis of Bit Error Rate of MIMO-FBMC System in Space Optical Communication

作　　者：罗宝翔 陈桂芬[1] 李友良 LUO Bao-xiang;CHEN Gui-fen;LI You-liang(School of Electronic and Information Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学电子信息工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2021年第5期71-78,共8页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(61540022);吉林省科技厅项目(20190302103GX);武器装备预先研究项目(614B021322,6141B012826)。

摘　　要：为改进传统光通信系统误码率高的问题,通过建立空间光通信联合大气信道模型,采用基于多输入多输出技术(Multiple Input Multiple Output,MIMO)的滤波器组多载波的交错正交幅度调制(FBMC-offset quadrature amplitude modulation,FBMC-OQAM)技术对信号进行调制解调,之后进行信道估计、均衡以得到解调信号。最终与采用正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)的调制模型在空时编码、最大似然估计检测、均衡三个过程对误码率性能方面与本模型相对比,根据仿真结果分析了两种系统的误码率性能。仿真结果显示,在同一大气信道下,FBMC调制系统的误码率随信噪比下降速率比OFDM明显更快。实验结果表明,FBMC调制技术在降低系统误码率上具有很大的优势,能够满足空间光通信的应用需求。In order to improve the problem of high bit error rate in the traditional optical communication system,the space optical communication joint atmospheric channel model is established;and the filter bank based on multiple input multiple output technology(Multiple Input Multiple Output,MIMO)is used to interleave orthogonal amplitudes of multiple carriers.The signals are modulated and demodulated by Modulation(FBMC-offset quadrature amplitude modulation,FBMC-OQAM)modulation technology;and finally the decoded result is obtained.And compared with the traditional Orthogonal Frequency Division Multiplexing(OFDM)modulation method in the bit error rate performance parameter curve,the bit error rate performance of the two systems is analyzed.The simulation results show that under the same atmospheric channel,the bit error rate of the FBMC modulation system decreasing with the SNR is significantly faster than that of OFDM.Experimental results show that FBMC modulation technology has great advantages in reducing system error rate and can meet the application requirements of space optical communication.

关 键 词：空间光通信 相干空间光通信系统 滤波器组多载波偏移幅度调制 系统性能 

分 类 号：TN911.3[电子电信—通信与信息系统] TN249[电子电信—信息与通信工程]