An Efficient Inter-Carrier Interference Cancellation Scheme for OFDM Systems with Frequency Estimation Errors

作者：Hu, Wei Wen^*; Li, Chih Peng

来源：IEICE - Transactions on Communications, 2010, E93B(12): 3600-3605.

DOI：10.1587/transcom.E93.B.3600

• OFDM
• interference cancellation
• synchronization
• carrier frequency offset

One of the major drawbacks of orthogonal frequency division multiplexing (OFDM) systems is their vulnerability to synchronization errors To remedy the inter carrier interference (ICI) effect caused by carrier frequency offset (CFO) estimation errors this paper proposes a weighted linear parallel ICI cancellation (WLPICIC) equalizer The optimal weights in the WLPICIC scheme are derived in closed form expressions by maximizing the average signal to interference ratio (SIR) at the WLPICIC output of each sub carrier The simulation results show that the WLPICIC equalizer significantly improves the performance of OFDM systems with frequency estimation errors in both AWGN channels and frequency selective fading channels

• 出版日期2010-12
• 单位中山大学