通信学报2017，Vol.38Issue(2)：173-182,10.DOI:10.11959/j.issn.1000-436x.2017040
PCMA系统中干扰信号的频偏与时延联合估计
Joint estimation of interference frequency offset and time delay in PCMA system
摘要
Abstract
For cooperative received high-order modulation PCMA (paired carrier multiple access) signals, joint estima-tion of frequency offset and time delay was proposed. The sequence samples stored locally were used as auxiliary data. Estimation of frequency offset and time delay was calculated by optimizing the objective function, which was obtained from the cross-correlation computation of the auxiliary data and mixed signal, and the optimized process was accom-plished by utilizing two-dimensional search. By setting the threshold of joint estimation, the calculated amount was greatly reduced. Modified Cramer-Rao bound (MCRB) of interference frequency offset and time delay was derived, which provided theoretical basis for performance of the proposed algorithm. Simulation results show that the algorithm has similar performance with existing algorithms, but its complexity is reduced by two-thirds.关键词
成对载波多址/高阶调制/频偏估计/联合估计/修正的克拉美罗界Key words
PCMA/high-order modulation/frequency offset estimation/joint estimation/MCRB分类
信息技术与安全科学引用本文复制引用
魏雪娟,杨勇,郭一鸣,张冬玲..PCMA系统中干扰信号的频偏与时延联合估计[J].通信学报,2017,38(2):173-182,10.基金项目
国家自然科学基金资助项目(No.61401511) The National Natural Science Foundation of China (No.61401511) （No.61401511）
