Optimization Algorithms for Improving the Performance of Permutation Trellis Codes

In this paper, soft-decision decoders of permutation trellis codes (PTC) with M-ary frequency shift-keying are designed using three optimization algorithms and presented in four different decoding schemes. The bit error rate (BER) performance of the schemes are presented in an additive white Gaussian noise (AWGN) and power-line communication (PLC) channel while the complexities of the schemes are also presented. Results show that the soft-decision decoders improve the BER performance of PTC by up to 3dB for an AWGN channel and 2dB in a PLC channel at a BER of 104.