Optimization algorithms for improving the performance of permutation trellis codes

In this paper, soft-decision (SD) decoders of permutation trellis code (PTC) with M-ary frequency shift keying are designed using three optimization algorithms and presented in four decoding schemes. In a concatenated code such as PTC, the Viterbi decoder for the outer convolutional code provides ma...

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Vydáno v:Physical communication Ročník 44; s. 101237
Hlavní autoři: Kolade, Oluwafemi, Shimaponda-Nawa, Mulundumina, Versfeld, Daniel J.J., Cheng, Ling
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.02.2021
Témata:
[formula omitted]-FSK
Hungarian
Munkres
Murty
Permutation codes
Permutation trellis
Soft-decision decoding
Viterbi decoding algorithm
Viterbi decoding algorithm
Permutation codes
Hungarian
M-FSK
Munkres
Murty
Soft-decision decoding
Permutation trellis
ISSN:1874-4907, 1876-3219
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Shrnutí:In this paper, soft-decision (SD) decoders of permutation trellis code (PTC) with M-ary frequency shift keying are designed using three optimization algorithms and presented in four decoding schemes. In a concatenated code such as PTC, the Viterbi decoder for the outer convolutional code provides maximum likelihood decoding. Hence, the error correction performance is dependent on the decoding scheme used for the inner code. Due to the structure of the encoder with the modulation scheme, the channel output can be interpreted as an assignment problem. SD decoding can then be designed accordingly, using the presented, low-complexity optimization-based schemes. The bit error rate (BER) performance of the schemes are simulated in an additive white Gaussian noise (AWGN) and powerline communication (PLC) channel. The complexities of the schemes are also presented. The performance of the SD schemes are compared with the existing SD threshold detector, with BER results showing significant coding gain for certain codebooks. From the results, a reasonable trade-off between the complexity and coding gain is observed for a noisy channel such as the PLC channel.
ISSN:1874-4907
1876-3219
DOI:10.1016/j.phycom.2020.101237