Frenquency offset estimation and correction in MB-OFDM system

Abstract

Abstract: The effects of Carrier Frequency Offset（CFO） and Sampling clock Frequency Offset（SFO） in Orthogonal Frequency Division Multiplexing（OFDM） based MB-OFDM UWB system are analyzed. A frequency-domain CFO and SFO joint estimation and compensation algorithm is proposed. This algorithm enables joint carrier and sampling frequency-offset estimation and correction from four consecutive training symbols. Simulation results show that the proposed joint estimation and compensation scheme is competent for large CFO and SFO offset effects.

Key words: Orthogonal Frequency Division Multiplexing（OFDM）, Carrier Frequency Offset（CFO）, Sampling Frequency Offset（SFO）, joint estimation and correction

摘要： 分析了超宽带MB-OFDM系统中载波频率偏差和采样时钟频率偏差对系统性能的影响。提出了一种频域载波频偏和采样频偏的联合估计与补偿算法。该算法利用四个连续的训练符号对这两种频率偏差进行综合估计与补偿。系统仿真证明，即使同时存在较大的载波频率偏差和采样时钟频率偏差时，提出的联合估计与补偿算法仍然能够提供较好的系统误码性能。

关键词: 正交频分复用, 载波频率偏差, 采样时钟频率偏差, 联合估计与补偿

LI Kai, LI Muyuan, ZHOU Jun, YE Fan, REN Junyan. Frenquency offset estimation and correction in MB-OFDM system[J]. Computer Engineering and Applications, 2012, 48(12): 63-66.

李凯，李慕媛，周军，叶凡，任俊彦. MB-OFDM系统中频偏的估计与补偿[J]. 计算机工程与应用, 2012, 48(12): 63-66.

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Frenquency offset estimation and correction in MB-OFDM system

MB-OFDM系统中频偏的估计与补偿

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