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In this paper, we describe a new concatenated decoding scheme based on iterations between an inner sequentially decoded convolutional code of rate B =1/4 and memory M -23, and block interleaved outer Reed-Solomon (RS) codes with nonuniform profile. With this scheme decoding with good performance is possible as low as Eb/No =0.6 dB, which is about 1.25 dB below the signal-to-noise ratio (SNR) that marks the cutoff rate for the full system. Accounting for about 0.45 dB due to the outer codes, sequential decoding takes place at about 1.7 dB below the SNR cutoff rate for the convolutional code. This is possible since the iteration process provides the sequential decoders with side information that allows a smaller average load and minimizes the probability of computational overflow. Analytical results for the probability that the first RS word is decoded after C computations are presented. These results are supported by simulation results that are also extended to other parameters. © 1998 IEEE.

Original publication

DOI

10.1109/26.725306

Type

Journal article

Journal

IEEE Transactions on Communications

Publication Date

01/12/1998

Volume

46

Pages

1280 - 1291