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Abstract
AbstractIn digital mobile radio, it is well known that the error control by block codes is effective for improving the code error performance in the multipath fading channel. Chase has proposed efficient soft decision decoding algorithms for block codes. In this paper, the word error rate performance of Chase's second algorithm using the received carrier level as CMI (channel measurement information) is described in the Rayleigh fading. First, the upper and lower bounds of the word error rate in the Rayleigh fading channel are derived theoretically assuming independent variations of received carrier level corresponding to each bit in a received block. The computer simulation results agree well with the theoretical results. Next, for the case where received carrier level variations are correlated, the word error rate performance is obtained by computer simulation using the Golay code as an example, and the bitinterleaving size required to make the variations of the received CNR statistically independent, and to randomize the errors occurring in a received block is calculated.
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