基于子载波补给索引调制的OFDM传输方案  

OFDM transmission scheme with subcarrier supply index modulation

作　　者：郭漪[1] 王翊卿 樊媛媛 刘刚[1] GUO Yi;WANG Yiqing;FAN Yuanyuan;LIU Gang(State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《通信学报》2023年第2期104-111,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62171354,No.61871387,No.61861041)。

摘　　要：针对基于索引调制的正交频分复用(OFDM-IM)技术存在子载波激活模式(SAP)不能匹配二进制数、影响系统性能的缺点,提出了基于子载波补给索引调制的正交频分复用(OFDM-SSIM)传输方案。所提方案通过在OFDM-IM的索引信息中加入补给索引,提高了系统的索引利用率,提升了系统的频谱效率(SE)。同时,由于所提方案的子载波激活模式与二进制数字相匹配,使系统易于采用低复杂度对数似然比(LLR)检测,并且保持良好的误码率(BER)性能。理论分析与仿真结果表明,在加性白高斯噪声(AWGN)信道和瑞利衰落信道下,相比传统OFDM-IM方案,所提方案有效地提升了SE和BER性能。To address the drawback that subcarrier activation pattern(SAP)of the orthogonal frequency division multiplexing with index modulation(OFDM-IM)cannot match the binary numbers which affects the system performance,the orthogonal frequency division multiplexing with subcarrier supply index modulation(OFDM-SSIM)transmission scheme was proposed.The index utilization of the system was improved and the spectral efficiency(SE)of the system was enhanced by adding the supply index.Also,as the subcarrier activation pattern of the proposed scheme match the binary numbers,low complexity log-likelihood ratio(LLR)detection was made easy to adopt and bit error rate(BER)performance was maintained good.Theoretical analysis and simulation results show that the proposed scheme effectively improves the SE and BER performance over classical OFDM-IM scheme in additive white Gaussian noise(AWGN)channels and Rayleigh fading channels.

关 键 词：索引调制 正交频分复用 频谱效率 对数似然比 

分 类 号：TN929.1[电子电信—通信与信息系统]