A simplified soft-output QRD-M MIMO detector

  • Authors:

  • Haifang Jian;Yong Yi;Yin Shi

  • Affiliations:

  • Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China;Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China;SmartChip Integration, Suzhou, China

  • Venue:
  • WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
  • Year:
  • 2009

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Abstract

In this paper, a low-complexity soft-output QRD-M detection algorithm is proposed for high-throughput Multiple-input multiple-output (MIMO) systems. By employing novel expansion on demand and distributed sorting scheme, the proposed algorithm can reduce 70% and 85% foundational operations for 16-QAM and 64-QAM respectively compared to the conventional QRD-M algorithm. Furthermore, the proposed algorithm can yield soft information to improve the bit error rate (BER) performance. Simulation results show that the proposed algorithm can achieve a near-ML detection performance with less foundational operations.