Channel estimation and user-wise symbol detection for space-time ...
Channel estimation and user-wise symbol detection for space-time ...
Channel estimation and user-wise symbol detection for space-time ...
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10 010 −1Av. BER10 −210 −30 1 2 3 4 5 6 7 8SNR in dBFigure 3: Av. BER of K=2, N=2, M=4 vs ¡¢ W¨ .The solid line represents ML by enumeration when channelis exactly known. Dashed line is ML using linearresponse theory using estimated channel <strong>and</strong> star-solidline is ML using naive mean field theory using estimatedchannel.[12] J. A. Fessler, <strong>and</strong> A. O. Hero, ”Space-AlternatingGeneralized Expectation Maximization Algorithm”, IEEE Trans. on Signal Processing, vol.42(10). pp.2664-2677, Oct. 1994.[13] P. F. R. Sorensen, O. Winther, <strong>and</strong> L. K. Hansen,”Mean field approaches to independent componentanalysis”, Neural Computation, pp.889-918, 2002.[14] M. Opper, <strong>and</strong> O. Winther, ”Variational linear response”, In advances in Neural In<strong>for</strong>mation Processing(NIPS), 2003.
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