| 下行频率选择性相关衰落信道下的空时特征波束编码 |
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| 引用本文： | 李勇朝,廖桂生,仝文宁.下行频率选择性相关衰落信道下的空时特征波束编码[J].上海大学学报(英文版),2006,10(6):500-505. |
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| 作者姓名： | 李勇朝 廖桂生 仝文宁 |
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| 作者单位： | [1]National Key Laboratory for Radar Signal Processing, Xidian University, Xi ＇ an 710071, P.R. China [2]School of Humanities and Arts, Xidian University, Xi＇an 710071,P.R. China |
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| 基金项目： | 国家自然科学基金;山西省自然科学基金 |
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| 摘 要： | 1 Introduction Space-ti me coding (STC)1-4]is an emerging tech-nique in communications . Multi-input multi-output(MIMO) signals are encoded in both spatial and tem-poral domains .As a result ,diversity and coding gainsare achieved . Most works to date on this subject arebased on two fundamental assumptions . One is thatthe transmitter does not knowthe channel state infor-mation (CSI) ,i.e.,openloop .The otheris that fad-ing from each base station antenna to any mobile an-tenna is indepen…
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| 关 键 词： | OFDM 空时编码 特征波束 下行链路频率选择性相关编码信道 |
| 文章编号： | 1007-6417（2006）06-0500-06 |
| 收稿时间： | 2005-01-11 |
| 修稿时间： | 2005-03-28 |
Space-time coded eigenbeamforming for downlink frequency-selective correlated fading channels |
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| Yong-zhao Li,Gui-sheng Liao Ph. D.,Wen-ning Tong.Space-time coded eigenbeamforming for downlink frequency-selective correlated fading channels[J].Journal of Shanghai University(English Edition),2006,10(6):500-505. |
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| Authors: | Yong-zhao Li Gui-sheng Liao Ph D Wen-ning Tong |
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| Institution: | 1. National Key Laboratory for Radar Signal Processing, Xidian University, Xi'an 710071, P.R. China
2. School of Humanities and Arts, Xidian University, Xi'an 710071, P.R. China |
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| Abstract: | To improve the performance of space-time coding over downlink frequency-selective correlated fading channels, a novel transmission scheme combining eigenbeamfoming and OFDM is proposed. Provided that the channel correlated statistics are available at the transmitter, the wideband correlated fading channels can be converted into an independent FIR channel with 2 transmitting antennas and N receiving antennas by eigenbeamforming and dimension reduction. OFDM is utilized to convert the FIR channel into a group of independent parallel subchanneis to carry space-time codes. With the new structure, the performance of space-time coding over downlink wideband correlated fading channels is greatly improved and the system complexity is reduced. Validity of the proposed system is verified by simulations under different conditions. Comparison between the new structure and an available structure is made both theoretically and computationslly. |
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| Keywords: | frequency-selective correlated fading OFDM space-time coded eigenbeamforming |
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