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
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
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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