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Design and Implementation of Efficient Symbol Detector for MIMO Spatial Multiplexing Systems  

Jung, Yun-Ho (School of ETCE, Korea Aerospace University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.45, no.10, 2008 , pp. 75-82 More about this Journal
Abstract
In this paper, we propose an efficient symbol detection algorithm for multiple-input multiple-output spatial multiplexing (MIMO-SM) systems and present its design and implementation results. By enhancing the performance of the first detected symbol which causes error propagation, the proposed algorithm achieves a considerable performance gain as compared to the conventional sorted QR decomposition (SQRD) based detection and the ordered successive detection (OSD) algorithms. The bit error rate (BER) performance of the proposed detection algorithm is evaluated by the simulation. In case of 16QAM MIMO-SM system with 4 transmit and 4 receive ($4{\times}4$) antennas, at $BER=10^{-3}$ the proposed algorithm obtains the gai improvement of about 2.5-13.5 dB over the conventional algorithms. The proposed detection algorithm was designed in a hardware description language (HDL) and synthesized to gate-level circuits using 0.18um 1.8V CMOS standard cell library. The results show that the proposed algorithm can be implemented without increasing the hardware costs significantly.
Keywords
MIMO; ordered successive detection; QR decomposition; spatial multiplexing; symbol detection;
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