An Improved PTA Method to Estimate the Residual Carrier Frequency Offset in Wireless OFDM Systems

摘要：

An improved pilot tone aided (PTA) method to estimate the residual frequency offset (RCFO) is proposed for wireless orthogonal frequency division multiplexing (OFDM)systems. Based on the estimated SNRs of the subchannels, the cross-correlation data between adjacent OFDM symbols on the sub-channels with high quality transmissions are selected, and hard decided. The hard decisions and data on the pilot tones are used to estimate the residual frequency offset on the corresponding sub-channels respectively. Each of the estimated RCFOs is weighted by the SNR on the corresponding subchannel and combined to improve the RCFO estimation performance. The simulation results indicate that the proposed scheme achieves much better performance than the available PTA schemes.

关键词： OFDM synchronization residual frequency offset estimation.

作者: Guangliang Ren Jiangtao Xing Huining Zhang

作者单位: National Key Laboratory of ISN Xidian University Xian Shaanxi 710071 CHINA

会议类型: 国际会议

会议名称: 第三届信号设计及其在通信中的应用国际会议(Proceedings of 2007 International Workshop on Signal Design and Its Applications in Communications IWSDA07)

会议地点: 成都

会议语种:英文

页码: 318-322

在线出版日期: 2007-09-23（万方平台首次上网日期，不代表论文的发表时间）