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Volume 30 Issue 2
Jan.  2011
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Li Ying, Wang Xin, Zhang Xiao-ying, Wei Ji-bo . A Soft-Detector Based on Multiple Symbol Differential Detection for Unitary Space-Time Modulation[J]. Journal of Electronics & Information Technology, 2008, 30(2): 435-438. doi: 10.3724/SP.J.1146.2006.01054
Citation: Li Ying, Wang Xin, Zhang Xiao-ying, Wei Ji-bo . A Soft-Detector Based on Multiple Symbol Differential Detection for Unitary Space-Time Modulation[J]. Journal of Electronics & Information Technology, 2008, 30(2): 435-438. doi: 10.3724/SP.J.1146.2006.01054

A Soft-Detector Based on Multiple Symbol Differential Detection for Unitary Space-Time Modulation

doi: 10.3724/SP.J.1146.2006.01054
  • Received Date: 2006-07-17
  • Rev Recd Date: 2007-01-16
  • Publish Date: 2008-02-19
  • A soft-detector with low complexity is proposed for Differential Unitary Space-Time Modulation (DUSTM). Based on the multiple symbol differential detection, the detector provides log-likelihood ratios of coded bits for the successive soft-decision decoding. Simulation results show that by using the proposed algorithm in a coded DUSTM system, the signal power efficiency is improved by 2~4dB compared with the counterpart of hard-decision decoding within an acceptable range of bit error rate, and the error floor caused by a single symbol differential soft-detector is eliminated in fast fading.
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