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One-User/One-Group Soft-Decision Aided Multiuser Detection for 2D Spread MC DS-CDMAs

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DOI: 10.4236/cn.2013.53B2023    2,478 Downloads   3,226 Views  

ABSTRACT

We consider the uplink of a multiuser, multiple-input multiple-output (MIMO), frequency-time-domain spread, multi- carrier (MC), direct sequence code division multiple access (DS-CDMA) system. As other CDMA-like systems, the multiple access interference (MAI) effect still exists in such an MC DS-CDMA system. To mitigate the MAI effect, we propose user-based and group-based layered detection schemes. Specifically, to enable a trade-off between the performance and the computational complexity, the schemes only use one user's/group's soft decisions for user-based/ group-based layered detection. The results of simulations demonstrate that the proposed schemes outperform existing approaches, and their computational complexity is modest.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Lu, H. and Lai, I. (2013) One-User/One-Group Soft-Decision Aided Multiuser Detection for 2D Spread MC DS-CDMAs. Communications and Network, 5, 119-126. doi: 10.4236/cn.2013.53B2023.

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