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Efficient Lattice-Reduction-Aided Successive Interference Cancellation for Clustered Multiuser MIMO System
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- Authors
- Jaehyun Park, Joohwan Chun
- Issue Date
- 2012-07
- Citation
- IEEE Transactions on Vehicular Technology, v.61, no.8, pp.3643-3655
- ISSN
- 0018-9545
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- The lattice-reduction (LR)-aided successive interference cancellation (SIC) is a well-known detection technique achieving near-maximum-likelihood (ML) performance in the multiuser system. However, the LR algorithm and the computation of sequential nulling vectors still incur considerable computational complexity overhead for a large number of mobile stations (MSs). To overcome it, we propose a decoupled LR-aided SIC for clustered MSs, in which the entire system is linearly decoupled into multiple lower dimensional subsystems before the LR-aided SIC is applied. In addition, efficient MS grouping algorithms are proposed to optimize the detection performance of the decoupled LR-aided SIC. The proposed LR-aided SIC with linear preprocessing exhibits a full diversity order, compared with the conventional LR-aided SIC, with considerable computational savings. Finally, to further improve the system performance, a nested LR-aided SIC with preprocessing is also developed. © 2012 IEEE.
- KSP Keywords
- Computational complexity, Diversity Order, Full diversity, MIMO system, Multiuser systems, Successive Interference Cancellation, System performance, detection performance, detection techniques, lattice reduction(LR), maximum likelihood