MC-CDMA信号子载波参数盲估计  

Blind estimation of subcarrier parameters for MC-CDMA signal

作　　者：杨凯 张天骐[1] 赵亮[1] 张婷[1] YANG Kai;ZHANG Tian-qi;ZHAO Liang;ZHANG Ting(Chongqing Key Laboratory of Signal and Information Processing(CQKLS&IP),Chongqing University of Posts and Telecommunications(CQUPT),Chongqing 400065,China)

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《计算机工程与设计》2018年第2期311-315,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(61671095;61371164);信号与信息处理重庆市市级重点实验室建设基金项目(CSTC2009CA2003);重庆市教育委员会科研基金项目(KJ130524;KJ1600427;KJ1600429)

摘　　要：为解决多载波码分多址(MC-CDMA)信号子载波参数估计问题,提出四阶循环累积量算法。利用MC-CDMA信号子载波之间的正交性,对信号的每一路子载波分别求其四阶循环累积量,进行累加求出信号的四阶循环累积量,估计出MC-CDMA信号的子载波数目和子载波频率间隔。通过分析单载波信号的四阶循环累积量,估计单载波信号的载波频率,进一步识别出MC-CDMA信号和单载波信号。仿真结果表明,该算法在较低信噪比下可以有效估计MC-CDMA信号的子载波参数和单载波信号的载波频率。To solve the subcarrier parameter estimation problem in multi carrier-code division multiple access(MC-CDMA)signal,the fourth-order cyclic cumulants method was proposed.Using the orthogonality between subcarriers of the MC-CDMA signal,the fourth-order cyclic cumulants was obtained for each subcarrier of the signal,and the fourth-order cyclic cumulants of the signal was accumulated.The number of subcarriers and the subcarrier frequency interval of the MC-CDMA signal were estimated.Based on the analysis of the fourth-order cyclic cumulants of the single carrier signal,carrier frequency of the signal was estimated.The MC-CDMA signal and the single carrier signal were identified.The simulation results show that the proposed algorithm can effectively estimate the subcarrier parameters of the MC-CDMA signal and the carrier frequency of the single carrier signal at lower signal-to-noise ratio.

关 键 词：多载波码分多址信号 单载波信号 四阶循环累积量 子载波参数 信噪比 

分 类 号：TN911.7[电子电信—通信与信息系统]