Turbo Codes for Fading and Burst Channels
نویسندگان
چکیده
Joseph H. Kang, Wayne E. Stark, and Alfred O. Hero Dept. of Electrical Engineering and Computer Science University of Michigan, Ann Arbor Abstract In this paper, turbo codes are investigated in fading and burst channels. In particular, we consider the design and performance of turbo codes for a GilbertElliot burst channel and in a realistic fading channel. For both cases, our approach is to compute estimates of unknown channel state parameters and use these in the turbo decoder. For the burst channel model, calculation of state estimates requires knowledge of the hidden Markov model (HMM) transition probabilities. When these probabilities are unknown, the Baum-Welch reestimation procedure is used.
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تاریخ انتشار 1998