| Novel time-frequency differential space-time modulation for multi-antenna OFDM systems |
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| 作者姓名： | Tian Jifeng Jiang Haining Song Wentao Luo Hanwen & Xu Youyun Dept. of Electronic Engineering Shanghai Jiaotong Univ. Shanghai P.R. China |
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| 作者单位： | Tian Jifeng，Jiang Haining，Song Wentao，Luo Hanwen & Xu Youyun Dept. of Electronic Engineering，Shanghai Jiaotong Univ.，Shanghai 200030，P.R. China |
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| 基金项目： | 国家自然科学基金;国家科技攻关项目 |
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| 摘 要： | 1.INTRODUCTIONRecently,there has been considerable interest in thewireless communication system with multiple trans-mit and receive antennas1,2].So far,most researchon space-ti me modulation has assumed that accuratechannel esti mations are available at the receivers.Differential space-ti me(DST)modulationschemes were proposed to achieve diversity gainswithout channel state information(CSI)3].DSTmodulation schemes allowfor slowly changing chan-nels that have to remaininvariant within…
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| 收稿时间： | 8 December 2004 |
Novel time-frequency differential space-time modulation for multi-antenna OFDM systems |
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| Tian Jifeng,Jiang Haining,Song Wentao,Luo Hanwen & Xu Youyun Dept. of Electronic Engineering,Shanghai Jiaotong Univ.,Shanghai ,P.R. China.Novel time-frequency differential space-time modulation for multi-antenna OFDM systems[J].Journal of Systems Engineering and Electronics,2006,17(1):54-58. |
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| Authors: | Tian Jifeng Jiang Haining Song Wentao Luo Hanwen Xu Youyun |
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| Institution: | 1. National Key Lab for Radar Signal Processing, Xidian Univ., Xi'' an 710071, P. R. China;2. Shanghai Research Inst. of Huawei Technologies Co., LTD, Shanghai 200050, P. R. China |
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| Abstract: | Differential space-time (DST) modulation has been proposed recently for multiple-antenna systems over Rayleigh fading channels, where neither the transmitter nor the receiver knows the fading coefficients. Among existing schemes, differential modulation is always performed in the time domain and suffers performance degradations in frequency-selective fading channels. In order to combat the fast time and frequency-selective fading, a novel time-frequency differential space-time (TF-DST) modulation scheme, which adopts differential modulation in both time and frequency domains, is proposed for multi-antenna orthogonal frequency division multiplexing (OFDM) system. A corresponding sub-optimal yet low-complexity non-coherent detection approach is also proposed. Simulation results demonstrate that the proposed system is robust for time and frequency-selective Rayleigh fading channels. |
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| Keywords: | differential space-time modulation MIMO OFDM time-varying channel |
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