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Volume 29 Issue 9
Jan.  2011
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Wang Xin, Li Ying, Wei Ji-bo. A Low Complexity Multiple-Symbol Differential Sphere Decoding for Differential Unitary Space-Time Modulation[J]. Journal of Electronics & Information Technology, 2007, 29(9): 2199-2202. doi: 10.3724/SP.J.1146.2006.01053
Citation: Wang Xin, Li Ying, Wei Ji-bo. A Low Complexity Multiple-Symbol Differential Sphere Decoding for Differential Unitary Space-Time Modulation[J]. Journal of Electronics & Information Technology, 2007, 29(9): 2199-2202. doi: 10.3724/SP.J.1146.2006.01053

A Low Complexity Multiple-Symbol Differential Sphere Decoding for Differential Unitary Space-Time Modulation

doi: 10.3724/SP.J.1146.2006.01053 cstr: 32379.14.SP.J.1146.2006.01053
  • Received Date: 2006-07-17
  • Rev Recd Date: 2007-01-02
  • Publish Date: 2007-09-19
  • In this paper, an improved multiple-symbol differential sphere decoding for differential unitary space-time modulation is presented. According to this algorithm, the sphere decoding process only search the trial symbols with less Maximum Likelihood (ML) metrics rather than all the symbols in the constellation, and an element-by-element calculation method is also presented to compute the ML metric which facilitates an early detection of trial symbol with large ML metric. Simulations show that the presented algorithm can significantly reduce the computational complexity with nearly no performance degradation in moderate SNR range.
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  • Bhukania B and Schniter P. Multiple-symbol detecion of differential unitary space-time modulation in fast-fading channels with known correlation. http: //www.ece.osu.edu/` schniter/postscript/ciss02_dust.pdf, 2002 Mar.[2]Lampe L, Schober R, Pauli V, and Windpassinger C. Mulitple-symbol differential spere decoding[J].IEEE Trans. on Commun.2005, 53(12):1981-1985[3]Pauli V and Lampe L. Multiple-symbol differential sphere decoding for unitary space-time modulation. in IEEE GLOBECOM, MO. USA, 2005: 1630-1635.[4]Clarkson K L, Sweldens W, and Zheng A. Fast multiple- antenna differential decoding[J].IEEE Trans. on Commun.2001, 49(2):253-261[5]Ling C, Mow W H, Li K H, and Kot A C. Multiple-antenna differential lattice decoding[J].IEEE J.Select.Areas Commun.2005, 23(9):1821-1829[6]Chen X, Zhou K, and Aravena J L. A new family of unitary space-time codes with a fast parallel sphere decoder algorithm[J].IEEE Trans. on Info Theory.2006, 52(1):115-140[7]Hochwald B M and Sweldens W. Differential unitary space- time modulation[J].IEEE Trans. on Commun.2000, 48(12):2041-2052
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