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Spatial Multiuser Access for Reverse Link of Multiuser MIMO Systems  

Shin, Oh-Soon (숭실대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.10A, 2008 , pp. 980-986 More about this Journal
Abstract
Spatial multiuser access is investigated for the reverse link of multiuser multiple-input multiple-output (MIMO) systems. In particular, we consider two alternative a aches to spatial multiuser access that adopt the same detection algorithm at the base station: one is a closed-loop approach based on singular value decomposition (SVD) of the channel matrix, whereas the other is an open-loop approach based in space-time block coding (STBC). We develop multiuser detection algorithms for these two spatial multiuser access schemes based on the minimum mean square error (MMSE) criterion. Then, we compare the bit error rate (BER) performance of the two schemes and a single-user MIMO scheme. Interestingly, it is found that the STBC approach can provide much better BER performance than the SVD approach as well as than a single-user MIMO scheme.
Keywords
Minimum mean square error (MMSE); Multiple-Input multiple-output (MIMO); Singular value decomposition (SVD); Space-time block coding (STBC); Spatial multiuser access;
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