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PSK and DPSK trellis codes for fast fading, shadowed mobile satellite communication channels

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4 Author(s)
McLane, P.J. ; Dept. of Electr. Eng., Queen''s Univ., Kingston, Ont., Canada ; Wittke, P.H. ; Ho, P.K.-M. ; Loo, C.

The performance of 8-PSK and 8-DPSK trellis codes is presented for a class of fast fading, land mobile satellite communication channels. The fading model is Rician but, in addition, the line-of-sight path is subjected to a fast lognormal attenuation that represents tree shadowing. The fading parameters used in this study represent the degree of shadowing and are based on measured data. The primary application considered is for digital speech transmission and thus, bit error probabilities in the order of 10-3 are emphasized. Sensitivity of the bit error probability to amplitude fading, amplitude and phase fading, and decoding delay is presented. Performance is determined via digital computer simulation. Optimal four- and eight-state codes are determined and optimality is found to be dependent on the presence of lognormal shadowing

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Communications, IEEE Transactions on  (Volume:36 ,  Issue: 11 )