低复杂度的分组检测空时接收机
The Low Complexity of Group Detecting Layered Space-Time Receiver
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摘要: V-BLAST接收机是提高无线通信系统传输数率的有效技术，但由于该算法存在大量的求伪逆、迫零和排序，算法的复杂度高，限制了它在实际中的应用；线性迫零(ZF)接收机和最小均方误差(MMSE)接收机复杂度低，但性能差。该文提出了一种分组检测空时接收机，组内采用串行干扰抵消接收，与V-BLAST接收机相比，降低了算法的复杂度。仿真结果表明：所提出的基于MMSE准则下的分组检测空时接收机的性能明显好于基于迫零准则的 V-BLAST接收机。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, 俞追专, 秦海燕, 张平. V-BLAST 的并行译码. 电子学报, 2003, 31(7): 990-993. -
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