基于分群子载波空时频MIMO-OFDM信道估计

喻华文; 尹俊勋; 赖国庭

doi:10.3724/SP.J.1146.2006.01698

基于分群子载波空时频MIMO-OFDM信道估计

doi: 10.3724/SP.J.1146.2006.01698

基金项目:

国家自然科学基金(60101002)资助课题

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出版历程
- 收稿日期: 2006-11-01
- 修回日期: 2007-07-06
- 刊出日期: 2008-01-19

Space-Time-Frequency Coded MIMO-OFDM Channel Estimation Based on Subcarrier Grouping

摘要

摘要: 针对空时频编码的MIMO-OFDM系统，根据子信道相关特性确定子载波分群，该文提出了独立子群导频法的信道估计处理策略，并将导频序列由空、频两域扩展到空、时、频域，能进一步提高估计精度。理论分析和计算机仿真表明，在频率选择性衰落信道下，基于空时频的独立子群导频法在较低运算复杂度下可以获得信道估计性能的明显改善。
- MIMO-OFDM; 信道估计; 空时频编码; 分群子载波
Abstract: In the Space-Time-Frequency(STF) coded MIMO-OFDM system, dividing the subchannels into groups of less correlated subchannels and applying STF coding to group STF(GSTF) subsystems, this paper proposes novel the optimal training design for GSTF systems where one group is assigned for training and others groups are for data, and the channel estimation based on the optimal training sequence is extended into Space-Time-Frequency dimensions with considering the time dimension. Theoretical analysis and numerical results show that the scheme gives distinct improvements in the channel estimates on frequency-selective fading channels with low coding and decoding complexity.

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参考文献(1)

Stuber G L, Barry J R, and McLaughlin S W. BroadbandMIMO-OFDM wireless communications. Proceedings of theIEEE, 2004, 92(2): 271-294.[2]赖国庭, 尹俊勋, 喻华文. MIMO系统在空时二维相关莱斯快衰落信道下的性能[J].电子与信息学报.2006, 28(8):1364-1367浏览[3]Lai Quoting, Yin Junxun, and Yu Huawen. Performance ofadaptive bit and power allocation MIMO-OFDM systembased on greedy algorithm. International Conference onWireless Communications, Networking and MobileComputing, Wuhan, PEOPLES R CHINA, 2005, 1: 44-49.[4]Bolcskei H and Paulraj A J. Space-frequency coded broadbandOFDM systems. IEEE Conference on Wireless Communicationsand Networking, Chicago, IL, USA, 2000, 1: 1-6.[5]Suto K and Ohtsuki T. Performance evaluation of space-time-frequency block codes over frequency selective fadingchannels. IEEE Conference on Vehicular Technology,Vancouver, Canada, 2002, 3: 1466-1470.[6]Liu Zhiqiang, Xin Yan, and Giannakis G B. Space-timefrequencycoded OFDM over frequency-selective fadingchannels[J].IEEE Transactions on Signal Processing.2002,50(10):2465-2476[7]张红伟, 罗汉文, 宋文涛, 刘兴钊. 基于循环延迟分集的空时频编码策略. 上海交通大学学报, 2004, 38(11): 1806-1809.Zhang Hong-wei, Luo Han-wen, Song Wen-tao, and LiuXing-zhao. A new space-time-frequency coded strategy basedon cyclic delay diversity. Journal of Shanghai JiaotongUniversity, 2004, 38(11): 1806-1809.[8]宋高俊, 周正中, 钟俊. 宽带非相干空时频分组编码. 电子科技大学学报, 2006, 35(2): 168-178.Song Gao-jun, Zhou Zheng-zhong, and Zhong Jun. Widebandnon-coherent space-time-frequency block coding. Journal ofUniversity of Electronic Science and Technology of China,2006, 35(2): 168-178.[9]Barhumi I, Leus G, and Moonen M. Optimal trainingsequences for channel estimation in MIMO OFDM systems inmobile wireless channels. International Zurich Seminar onBroadband Communications, Zurich, Switzerland, 2002, 44:1-6.[10]王德胜, 朱光喜, 林宏志. MIMO-OFDM 最优导频设置与优化的信道估计方法. 通信学报, 2005, 26(1): 34-47.Wang De-sheng, Zhu Guang-xi, and Lin Hong-zhi. Optimalpilots and channel estimation in MIMO-OFDM system. Journalof China Institute of Communications, 2005, 26(1): 34-47.[11]Bolcskei H, Borgmann M, and Paulraj A J. Impact of thepropagation environment on the performance ofspace-frequency coded MIMO-OFDM[J].IEEE Journal onSelected Areas in Communications.2003, 21(3):427-439

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