Carrier Frequency Offset Compensation for an Interleaved OFDMA Uplink  

作　　者：范达 曹志刚 

机构地区：[1]State Key Laboratory on Microwave and Digital Communications,Department of Electronic Engineering,Tsinghua University

出　　处：《Tsinghua Science and Technology》2008年第1期1-8,共8页清华大学学报（自然科学版（英文版）

基　　金：the Specialized Research Fund for the Doctoral Program of Higher Education,Ministry of Education,China (No. 20030003039)

摘　　要：This paper reports an investigation of the carrier frequency offset （CFO） compensation in the uplink of the orthogonal frequency division multiple access （OFDMA） system with interleaved subcarrier assignment. The presence of CFOs between the transmitters and the uplink receiver will destroy the orthogonality among the different subcarriers, resulting in inter-carrier interference and multiuser interference. This paper proposes a pseudoinverse CFO compensation method based on the signal structure. The proposed method can compensate the CFOs of all users simultaneously and isolate the signals from all users at the same time. Compared with the existing CFO compensation methods, the new method provides a considerable signal-to-noise ratio gain on the bit error rate performance and has a relatively low implementation complexity.This paper reports an investigation of the carrier frequency offset （CFO） compensation in the uplink of the orthogonal frequency division multiple access （OFDMA） system with interleaved subcarrier assignment. The presence of CFOs between the transmitters and the uplink receiver will destroy the orthogonality among the different subcarriers, resulting in inter-carrier interference and multiuser interference. This paper proposes a pseudoinverse CFO compensation method based on the signal structure. The proposed method can compensate the CFOs of all users simultaneously and isolate the signals from all users at the same time. Compared with the existing CFO compensation methods, the new method provides a considerable signal-to-noise ratio gain on the bit error rate performance and has a relatively low implementation complexity.

关 键 词：orthogonal frequency division multiplexing access （OFDMA） carrier frequency offset （CFO） circular convolution PSEUDOINVERSE 

分 类 号：TN929.533[电子电信—通信与信息系统]