Adaptive turbo-trellis-coded modulation (TTCM)-4 aided asymmetric distributed source coding (DSC) is proposed, 5 where two correlated sources are transmitted to a destination 6 node. The first source sequence is TTCM encoded and is further 7 compressed before it is transmitted through a Rayleigh fading 8 channel, whereas the second source signal is assumed to be per-9 fectly decoded and, hence, to be flawlessly shown at the des-10 tination for exploitation as side information for improving the

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... 1 decoding performance of the first source. The proposed scheme 12 is capable of reliable communications within 0.80 dB of the 13 Slepian-Wolf/Shannon (SW/S) theoretical limit at a bit error rate 14 (BER) of 10 −5 . Furthermore, its encoder is capable of accom-15 modating time-variant short-term correlation between the two 16 sources. 17 Index Terms-Distributed source coding (DSC), joint source-18 channel coding, Slepian-Wolf (SW) coding, Turbo-trellis-oded 19 modulation (TTCM).