部分功率训练序列与OFDM承载数据的优化分离

刘田; 唐友喜; 赵宏志; 宋丽英; 李少谦

部分功率训练序列与OFDM承载数据的优化分离

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出版历程
- 收稿日期: 2005-01-24
- 修回日期: 2005-10-08
- 刊出日期: 2006-10-19

Optimum Separation of OFDM Data and Partial Power Training Sequence in Frequency Selective Fading Channels

摘要

摘要: 在采用部分功率训练序列同步的OFDM系统中，接收到的OFDM承载的数据信号会受到部分功率训练序列的严重干扰。由于信道估计的误差，使得对训练序列的分离同样存在误差。本文给出了在频率选择性衰落信道中，一种优化的抑制训练序列对OFDM承载数据的干扰的方法。通过理论分析，给出了优化的训练序列对消因子。计算机仿真结果验证了理论分析的合理性。
- 正交频分复用; 分离; 训练序列; 误比特率
Abstract: In Orthogonal Frequency-Division Multiplexing (OFDM) system, when using the partial power training sequence to synchronize, the received data signals will be seriously interfered by the training sequence. Due to the imperfect channel estimation, even if the training sequence separation technique is used, errors will also occur while using the inadequate knowledge of channel to perform the training sequence separation. This paper proposes an optimum method to suppress the interference from the training sequence to the data bearing OFDM symbols in frequency selective fading channels. A closed form formula for the optimized training sequence canceling factor is given by the theoretical analysis and its reasonability is verified by the simulation results.

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参考文献(1)

Kobayashi H. A novel symbol frame and carrier frequency synchronization for burst mode OFDM signal. Proc. IEEE VTC-Fall 2000. Boston (USA), 2000, vol 3: 1392-1396.[2]Kim Hyunjae, Kang Hongku, Hwang Wooncheol, Kim Kiseon. An improved frequency synchronization scheme using a modified OFDM burst format for wireless LAN systems[J].IEEE Trans. onConsumer Electronics.2000, 46:1021-1025[3]Seo Bo Seok, Kim Su Chang, Park Jinwoo, Ihm Jong Tae. Fast and low-complex frequency synchronization for OFDM. Proc. VTC 2001 Fall. Atlantic City, 2001, 2: 1120-1124.[4]Prasetyo B Y, Said F, Aghvami A H. Fast burst synchronization technique for OFDM-WLAN systems[J].IEE Proc. -Commun.2000, 147:292-298[5]Muller Weinfurtner S H. Burst frame and frequency synchronization with a sandwich preamble. Proc. GLOBECOM '01. San Antonio, Texas, 2001, 2: 1366-1370.[6]Muller Weinfurtner S H. Comparison of preamble structures for burst frequency synchronization. Proc. GLOBECOM '00. San Francisco, 2000, 3: 1488-1493.[7]Speth M.[J].Daecke D, Meyr H. Minimum overhead burst synchronization for OFDM based broadband transmission. Proc. Globecom98. Sydney.1998,:-[8]Zhou Shidong. Introduction on B3G activities in Tsinghua Univisity. Proc. of the International Forum on Future Mobile Telecommunications China-EU Post Conference on Beyond 3G, Tsinghua Univisity, 2001: 106-110.[9]Tufvesson F, Faulkner M, Hoeher P, Edfors O. OFDM time and frequency synchronization by spread spectrum pilot technique. Communication Theory Mini-Conference, Vancouver, British Columbia, Canada, 1999: 115-119.[10]Shuichi Ohno, Giannakis G B. Optimal training and redundant precoding for block transmissions with application to wireless OFDM[J].IEEE Trans on Commum.2002, 50(12):2113-2123[11]唐友喜, 赵宏志, 刘皓, 宋丽英, 刘田, 李少谦. OFDM系统数据与训练序列的一种分离技术. 电子学报，2005，33: 714 -717.[12]Dukhyun Kim, Stuber G L. Residual ISI cancellation for OFDM with applications to HDTV broadcasting[J].IEEE J. on Select. Areas Commun.1998, 16:1590-[13]Park S Y, Kang C G. Performance analysis of pilot symbol arrangement for OFDM system under time-varying multi-ath Rayleigh fading channels. IEICE Trans. Commun, 2001, E84-B, 36-45.[14]Proakis J G. Digital communications. 4th Edition, New York: McGraw-Hill, 1995: 953-956.[15]ITU-R. Guidelines for Evaluation of Radio Transmission Technologies for IMT-2000, 1997.

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