低復雜度的分組檢測空時接收機
The Low Complexity of Group Detecting Layered Space-Time Receiver
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摘要: V-BLAST接收機是提高無線通信系統(tǒng)傳輸數(shù)率的有效技術，但由于該算法存在大量的求偽逆、迫零和排序，算法的復雜度高，限制了它在實際中的應用；線性迫零(ZF)接收機和最小均方誤差(MMSE)接收機復雜度低，但性能差。該文提出了一種分組檢測空時接收機，組內(nèi)采用串行干擾抵消接收，與V-BLAST接收機相比，降低了算法的復雜度。仿真結果表明：所提出的基于MMSE準則下的分組檢測空時接收機的性能明顯好于基于迫零準則的 V-BLAST接收機。Abstract: V-BLAST receiver is effective technique in achieving high data rate in wireless communications. However, the complexity of V-BLAST is very high because much time must be consumed in performing linear nulling, successive interference canceling and sorting, and the application of V-BLAST is limited. The complexity of the ZF receiver and MMSE receiver is low, but performance is worse than V-BLAST. In this paper, a new layered space-time receiver is proposed using two stage successive interference canceling, and the complexity of new scheme is very low compared with the V-BLAST. The simulation results indicate that the performance of the proposed receiver based on MMSE is outperforms ZF V-BLAST receiver.
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Foschin G J. Layered space-time architecture for wireless communication in a fading environment when using multiple antennas[J]. Bell labs Technical Jurnal, 1966, 1(2): 41-59.[2]Wolniansky P W, Foschini G J, Golden G D, et al.. V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel [J]. IEEE ISSSE, USA, IEEE press, 1998: 230-235.[3]Golden G D, Foschini G J, et al.. Detection algorithm and initial laboratory results using V-BLAST space-time communication architecture [J].Electronics Letter.1999, 35(1):14-16[4]Sellathurai M, Haykin S. A simplified diagonal blast architecture with iterative parallel-interference cancellation receivers. IEEE international conference on Communications, Helsinki, Finland, 2001, vol.10: 3067-3071.[5]陶小峰, 俞追專, 秦海燕, 張平. V-BLAST 的并行譯碼. 電子學報, 2003, 31(7): 990-993. -
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