一种基于线性离散码的发射天线选择方案
doi: 10.3724/SP.J.1146.2005.00980
Transmit Antenna Selection for Linear Dispersion Codes
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摘要: 为了充分利用多天线系统的性能增益,该文提出了一种基于线性离散码的发射天线选择(LDC-TAS)方案。在准静态信道环境下,该文比较了所提方案的3种天线选择准则:最大信道增益准则,最大容量准则和最大化最小后验SNR准则。仿真数据显示,在不同的调制方式如QPSK,8PSK和16QAM环境下,最大化最小后验SNR准则比其他两种准则表现出更好的性能。在相同的频谱效率下,与BLAST-TAS相比,所提方案表现出明显的分集增益;在低信噪比环境下,与STBC-TAS相比,仍有一定的性能增益。
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关键词:
- 天线选择;线性离散码;线性接收机
Abstract: In an effort to utilize the advantage of using multiple antennas, transmit antenna selection for linear dispersion codes (LDC-TAS) is proposed in this paper. Three criteria are presented: maximum channel gain, maximum capacity and max-min post-SNR, for selecting the optimal transmit antennas when linear, coherent receiver is used over a slowly varying channel. Simulation results suggest that the max-min post-SNR criterion outperforms the other selection methods in a variety of modulation modes, such as QPSK, 8PSK and 16QAM. Compared with BLAST-TAS, under the same spectral efficiency, the proposed scheme shows significant diversity advantage. In low SNR environment, LDC-TAS is still better than STBC-TAS. -
[1] Telatar I E. Capacity of multi-antenna Gaussian channels[J].Euro. Trans. Telecommun.1999, 10(6):585-595 [2] Heath Jr R W and Paulraj A. Switching between spatial multiplexing and transmit diversity based on constellation distance. Proc. AllertonConf. Commun. Cont. Comput., Illinois, Oct. 2000, 2386-2389. [3] Tarokh V, Seshadri N, and Calderbank A R. Space-time codes for high data rate wireless communication: Performance criterion and code construction[J].IEEE Trans. on Inform. Theory.1998, 44(2):744-765 [4] Tarokh V, Jafarkhani H, and Calderbank A R. Space-time block codes from orthogonal designs. IEEE Trans. on Inform. Theory, 1999, 48(5): 1456-1467. [5] Hassibi B and Hochwald B M. High-rate codes that are linear in space and time[J].IEEE Trans. on Information Theory.2002, 48(7):1804-1824 [6] Heath R W Jr and Paulraj A J. Linear dispersion codes for MIMO systems based on frame theory[J].IEEE Trans. on Signal Processing.2002, 50(10):2429-2441 [7] Sanayei Shahab and Nosratinia Aria. Antenna Selection in MIMO Systems. IEEE Communications Magazine, 2004, 42(10): 68-73. [8] Zeng Xiang Nian and Ghrayeb Ali. Performance bounds for space-time block codes with receive antenna selection[J].IEEE Trans. on Information Theory.2004, 50(9):2130-2137 [9] Badic B, Fuxjaeger P, and Weinrichter H. Performance of quasi-orthogonal space-time code with antenna selection[J].IEEE Electronics Letters.2004, 40(20):1282-1284 [10] Heath R W, Sandhu Sumeet, and Paulraj Arogyaswami. Antenna selection for spatial multiplexing systems with linear receivers[J].IEEE Communications Letters.2001, 5(4):142-144 -
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