ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Combined ML and QR Detection Algorithm for MIMO-OFDM Systems with Perfect ChanneI State Information

  • You, Weizhi (State Key Lab of Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiao Tong University) ;
  • Yi, Lilin (State Key Lab of Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiao Tong University) ;
  • Hu, Weisheng (State Key Lab of Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiao Tong University)
  • Received : 2012.09.16
  • Accepted : 2012.12.13
  • Published : 2013.06.01
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Abstract

An effective signal detection algorithm with low complexity is presented for multiple-input multiple-output orthogonal frequency division multiplexing systems. The proposed technique, QR-MLD, combines the conventional maximum likelihood detection (MLD) algorithm and the QR algorithm, resulting in much lower complexity compared to MLD. The proposed technique is compared with a similar algorithm, showing that the complexity of the proposed technique with T=1 is a 95% improvement over that of MLD, at the expense of about a 2-dB signal-to-noise-ratio (SNR) degradation for a bit error rate (BER) of $10^{-3}$. Additionally, with T=2, the proposed technique reduces the complexity by 73% for multiplications and 80% for additions and enhances the SNR performance about 1 dB for a BER of $10^{-3}$.

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References

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