VLSI implementation of a fixed-complexity soft-output MIMO detector for high-speed wireless

Authors:
Di Wu;Johan Eilert;Rizwan Asghar;Dake Liu
Affiliations:
Department of Electrical Engineering, Linköping University, Linköping, Sweden and ST-Ericsson AT AB, Lund, Sweden;Department of Electrical Engineering, Linköping University, Linköping, Sweden and ST-Ericsson AT AB, Lund, Sweden;Department of Electrical Engineering, Linköping University, Linköping, Sweden;Department of Electrical Engineering, Linköping University, Linköping, Sweden
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2010

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Abstract

This paper presents a low-complexity MIMO symbol detector with close-Maximum a posteriori performance for the emerging multiantenna enhanced high-speed wireless communications. The VLSI implementation is based on a novel MIMO detection algorithm called Modified Fixed-Complexity Soft-Output (MFCSO) detection, which achieves a good trade-off between performance and implementation cost compared to the referenced prior art. By including a microcode-controlled channel preprocessing unit and a pipelined detection unit, it is flexible enough to cover several different standards and transmission schemes. The flexibility allows adaptive detection to minimize power consumption without degradation in throughput. The VLSI implementation of the detector is presented to show that real-time MIMO symbol detection of 20MHz bandwidth 3GPP LTE and 10MHz WiMAX downlink physical channel is achievable at reasonable silicon cost.