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A Fixed-Complexity Soft-MIMO Detector via Parallel Candidate Adding Scheme and its FPGA Implementation

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2 Author(s)
Xiang Wu ; Sch. of Eng., Edinburgh Univ., Edinburgh, UK ; Thompson, J.S.

This paper presents a fully parallel candidate adding (PCA) scheme for the soft-output sphere decoder, which can be used in turbo-coded multiple-input multiple-output (MIMO) systems to provide extrinsic soft information to the outer decoder for more robust decoding. The PCA assisted MIMO detector has been implemented and validated on a state-of-the-art Xilinx FPGA device. The results obtained indicate that the proposed scheme is clearly suitable for a highly parallel and fully pipelined hardware implementation which outperforms alternative algorithms with respect to the resource requirements and the decoding latency.

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Communications Letters, IEEE  (Volume:15 ,  Issue: 2 )