Improved fast recursive algorithms for V-BLAST and G-STBC with novel efficient matrix inversion

Authors:
Hufei Zhu;Wen Chen;Feng She
Affiliations:
Wireless Research Dept., Huawei Technologies Co., Ltd.;ept. of Electronic Engineering, Shanghai Jiao Tong Univ.;Wireless Research Dept., Huawei Technologies Co., Ltd
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

In this paper, we propose a novel matrix inversion algorithm, which speeds up the corresponding step in the existing fast recursive algorithm for vertical Bell Laboratories layered space-time architecture (V-BLAST) by 1.67. Totally our improved recursive algorithm for V-BLAST speeds up the existing recursive algorithm for V-BLAST by 1.3. Furthermore, we develop an efficient recursive algorithm to implement the minimum mean-square error (MMSE) successive interference cancellation (SIC) detector with optimal ordering for Groupwise Space-Time Block Coded system (G-STBC), by exploiting the properties of the Alamouti structure in the equivalent channel matrix for GSTBC. Our recursive algorithm for G-STBC speeds up the low-complexity MMSE SIC algorithm with sub-optimal ordering for G-STBC by 2.57 approximately.