| Antenna selection for V-BLAST systems in correlated channel |
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| 作者姓名： | 冯兴乐 Zhu Shihua Ren Pinyi |
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| 作者单位： | Department of Information and Conununication, Xi＇ an Jiaotong University, Xi＇ an 710049,P. R. China |
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| 基金项目： | 国家自然科学基金
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国家高技术研究发展计划(863计划) |
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| 摘 要： | Spatial multiplexing systems can provide significant capacity improvement but are sensitive to channel correlation. Antenna selection is a low-cost low-complexity ahemative to resolve these problems. This paper proposes a new transmit antenna selection algorithm for the spatial multiplexing systems with the Vertical-Bell Labs Layered Space-Time （V-BLAST） nonlinear receiver in correlated channel. The proposed scheme separates the optimization into two parts： it first chooses the optimal number of substreams in terms of the singular values of the channel matrix, then adapts the mapping of substreams to antennas according to the post-detection signal-to-noise ratio （SNR）. Simulation results illustrate that the proposed two-step selection criterion can provide greater selection gain than the existing singnlar value based selection criterion as SNR and scattering angle increases. The proposed criterion outperforms the existing one by 0.3 dB at a vector symbol error rate of 10^- 3 and scattering angle of 20 degree.
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| 关 键 词： | V-BLAST系统 相关信道 天线选择 空分复用 |
| 收稿时间： | 2005-05-25 |
Antenna selection for V-BLAST systems in correlated channel |
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| Feng Xingle,Zhu Shihua,Ren Pinyi.Antenna selection for V-BLAST systems in correlated channel[J].High Technology Letters,2007,13(1):69-73. |
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| Authors: | Feng Xingle Zhu Shihua Ren Pinyi |
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| Abstract: | Spatial multiplexing systems can provide significant capacity improvement but are sensitive to channel correlation. Antenna selection is a low-cost low-complexity alternative to resolve these problems. This paper proposes a new transmit antenna selection algorithm for the spatial multiplexing systems with the Vertical-Bell Labs Layered Space-Time(V-BLAST)nonlinear receiver in correlated channel. The proposed scheme separates the optimization into two parts: it first chooses the optimal number of substreams in terms of the singular values of the channel matrix, then adapts the mapping of substreams to antennas according to the post-detection signal-to-noise ratio(SNR). Simulation results illustrate that the proposed two-step selection criterion can provide greater selection gain than the existing singular value based selection criterion as SNR and scattering angle increases. The proposed criterion outperforms the existing one by 0.3 dB at a vector symbol error rate of 10-3 and scattering angle of 20 degree. |
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| Keywords: | multiple-input multiple-output(MIMO) antenna selection spatial multiplexing vertical-bell labs layered space-time(V-BLAST) correlated channel |
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