DOI QR코드

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Efficient Detection of Space-Time Block Codes Based on Parallel Detection

  • Kim, Jeong-Chang (Department of Electronics and Communications Engineering, Korea Maritime University) ;
  • Cheun, Kyung-Whoon (Department of Electronics and Electronical Engineering, Pohang University of Science and Technology (POSTECH))
  • 투고 : 2010.08.06
  • 심사 : 2011.01.19
  • 발행 : 2011.02.28

초록

Algorithms based on the QR decomposition of the equivalent space-time channel matrix have been proved useful in the detection of V-BLAST systems. Especially, the parallel detection (PD) algorithm offers ML approaching performance up to 4 transmit antennas with reasonable complexity. We show that when directly applied to STBCs, the PD algorithm may suffer a rather significant SNR degradation over ML detection, especially at high SNRs. However, simply extending the PD algorithm to allow p ${\geq}$ 2 candidate layers, i.e. p-PD, regains almost all the loss but only at a significant increase in complexity. Here, we propose a simplification to the p-PD algorithm specific to STBCs without a corresponding sacrifice in performance. The proposed algorithm results in significant complexity reductions for moderate to high order modulations.

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참고문헌

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