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Volume 32 Issue 6
Jun.  2010
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Chen Liang, Li Jian-dong, Chen Dong. An Improved QR Based Detection Algorithm for Layered Space-Time Codes[J]. Journal of Electronics & Information Technology, 2010, 32(6): 1505-1509. doi: 10.3724/SP.J.1146.2008.01186
Citation: Chen Liang, Li Jian-dong, Chen Dong. An Improved QR Based Detection Algorithm for Layered Space-Time Codes[J]. Journal of Electronics & Information Technology, 2010, 32(6): 1505-1509. doi: 10.3724/SP.J.1146.2008.01186

An Improved QR Based Detection Algorithm for Layered Space-Time Codes

doi: 10.3724/SP.J.1146.2008.01186
  • Received Date: 2008-09-22
  • Rev Recd Date: 2010-04-22
  • Publish Date: 2010-06-19
  • An improved QR based detection algorithm is proposed for use in the Multiple- Input Multiple-Output (MIMO) communication systems. The method does not require the pseudo inverse of the channel matrix. The probability of error propagation is reduced through serial interference canceling; the minimum error probability signal is removed layer by layer. It has less computational complexity than ordered QR based detection and ordered BLAST detection .Simulation shows that it outperforms the classic BLAST and ordered,suboptimal ordered QR based detection algorithm. In the uncoded 44 MIMO system with QPSK modulation, there proposed algorithm outperforms ZF-VBLAST by 2.5 dB and outperforms the sorted QR algorithm 5 dB at a BER of 10-3.
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  • Wolniansky P W, Foschini G J, and Golden G D, et al.. V-BLAST: An architecture for realizing very high data rates over the rich-scattering wireless channel[C]. IEEE Internation Symposium on Signals, Systems and Elctronics(ISSSE), Pisa, Italy, September 1998: 295-300.[2]丁子哲, 张贤达. 基于串行干扰抵消的V-BLAST检测[J]. 电子学报, 2007, 35(6A): 19-24.Ding Zi-zhe and Zhang Xian-da. V-blast detection based on successive interference cancellation[J]. Acta Electronica Sinica, 2007, 35(6A): 19-24.[3]郭志恒, 李立华, 陶小峰. 快速V-BLAST排序检测方法[J]. 北京邮电大学学报, 2007, 30(4): 83-86.Guo Zhi-heng, Li Li-hua, and Tao Xiao-feng. Fast ordering detection algorithm for V-blast systems[J]. Journal of Beijing University of Posts and Telecommunications, 2007, 30(4): 83-86.[4]Choi J. Nulling and cancellation detector for MIMO channels and its application to multistage receiver for coded signals: performance and optimization[J].IEEE Transactions on Wireless Communications.2006, 5(5):1207-1216[5]Wǔbben D, Bǒhnke R, and Rinas J, et al.. Efficient algorithm for decoding layered space-time codes[J].Electronics Letters.2001, 37(22):1348-1350[6]Hassibi B. An efficient square-root algorithm for blast [C]. IEEE Intl. Conf. Acoustic, Speech, Signal Processing, Turkey, June 5-9, 2000, 2: 737-740.[7]Wang W, Jin R, and Geng J. Improved partial parallel multistage detection for V-BLAST system[J].Electronics Letters.2007, 43(1):43-44[8]Zarikoff B W and Cavers J K. EXIT analysis of a soft-input/ soft-output iterative multiuser detector[C]. IEEE International Conference on Communications, Singapore, June, 2006, 11: 4965-4970.
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