Enhanced groupwise detection with a new receive combiner for spatial multiplexing MIMO systems

Sung Hyun Moon, Jeongsik Jeong, Heunchul Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In this letter, we propose a new groupwise receive combiner design for multiple-input multiple-output spatial multiplexing systems. The conventional group detection (GD) suffers from a considerable performance loss since the noise components are not taken into account. The output signal-to-interference- plus-noise ratio (SINR) is defined in each subgroup in order to consider both the desired signal and noise statistics. Adopting the real-valued representation, we provide an optimal receive combiner which maximizes the SINR with a general group size. The simulation results show that the proposed scheme achieves a large performance gain over the conventional GD in coded systems. Also, when combining with near-optimal detection algorithms such as sphere decoder, the proposed GD scheme offers a comparable performance with significant reduced complexity.

Original languageEnglish
Article number5577800
Pages (from-to)2511-2515
Number of pages5
JournalIEEE Transactions on Communications
Issue number9
Publication statusPublished - 2010 Sept


  • Multiple-input multiple-output (MIMO)
  • group detection
  • maximum-likelihood (ML) detection
  • spatial multiplexing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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