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| Optimum Zero-Forcing Detection of a Modified V-BLAST System with Delay Offsets |
| Lin Hua-jiong; Tang You-xi; Shao Shi-hai |
| National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu 610054, China |
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Abstract A modified Vertical-Bell Labs layered space-time (V-BLAST) system is proposed by Shao(2007). However, the ZF detection algorithm proposed by Shao is not the optimum under ZF criterion. In this paper, the optimum ZF detector is directly derived from the original continuous, unsampled signals at receive antennas. Both Analysis and simulation demonstrate that the optimum ZF detection is superior to the ZF detection algorithm proposed by Shao, especially when the number of transmit antennas is large.
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Received: 03 November 2008
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2009, Vol. 31 
