Frequency offset estimation in an OFDM system

被引：8

作者：

Chen, BS ^{[1
]}

Tsai, CL ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 30013, Taiwan

来源：

2001 IEEE THIRD WORKSHOP ON SIGNAL PROCESSING ADVANCES IN WIRELESS COMMUNICATIONS, PROCEEDINGS | 2001年

关键词：

D O I：

10.1109/SPAWC.2001.923868

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

Orthogonal Frequency Division Multiplexing (OFDM) system has recently attracted increasing interest for its robustness of frequency-selective fading, and is believed to be an important technique for future high-speed wireline and wireless communications, including cellular mobile communication systems. However, a well-known problem of such a multi-carrier modulation is its vulnerability to synchronization errors. The frequency offset, which results from a Doppler shift as well as inherent instability of transmit and the receive reference, causes a loss of orthogonality between the subcarriers, and hence, produces intercarrier interference (ICI), To solve this problem, we trade on the correlation of the samples at the output of the discrete Fourier transform (DFT) to estimate the frequency offset by using the extended Kalman filter (EKF), which tracks the frequency offset via a recursive procedure blindly. Simulation results will given to illustrate the tracking performance of this algorithm.

引用

页码：150 / 153

页数：4

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