西安电子科技大学学报（自然科学版）2012，Vol.39Issue(1)：135-140,6.DOI:10.3969/j.issn.1001-2400.2012.01.024
利用沃尔什码扩频的MC-CDMA系统频偏估计算法
Carrier frequency offset estimation algorithm in MC-CDMA systems with Walsh-code spreading
摘要
Abstract
Aiming at the multiple carrier frequency offset (CFO) problem in the uplink of MC-CDMA systems, a pilot algorithm based on Walsh-code spreading is proposed. The all "1" Walsh-code as the specific spreading code is used to spread two identical pilots of the interested user. At the receiver, by exploiting the different mean value properties between the specific pilot symbols spreading code and data symbols spreading codes, the received interested user's pilot signal components can be approximately extracted and accordingly the CFO of the interested user can be obtained with the phase-angle extraction method. Simulation results show that compared with the subspace decompose based ATS algorithm, the proposed estimator has similar CFO estimation performance with lower computation complexity under the frequency fading channel, and is especially suitable for the scenario where CFO needs tracking during the process of data transmission.关键词
多载波码分多址/正交频分复用/载波频偏/沃尔什码/扩频/导频Key words
MC-CDMA/OFDM/CFO/Walsh code/frequency spreading/pilot分类
信息技术与安全科学引用本文复制引用
刘立程,胡瑞..利用沃尔什码扩频的MC-CDMA系统频偏估计算法[J].西安电子科技大学学报（自然科学版）,2012,39(1):135-140,6.基金项目
国家自然科学基金资助项目(60901027) （60901027）
