Turbo Equalization of Serially Concatenated Systematic Convolutional Codes and Systematic Space Time Trellis Codes

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Description/Abstract

A novel turbo equalization arrangement is proposed, which is constituted by a serially concatenated systematic convolutional codec and a systematic space time trellis code (CC-SSTTC) assisted scheme. The BER performance of this scheme using various interleaving sizes was characterised over an equal-power two-path Rayleigh fading channel. After eight turbo equalization iterations, an interleaving gain of approximately 5.5 dB was recorded at BER = $10^4$ for the CC-SSTTC system using a 6400-bit Space Time Trellis (STT)interleaver, when compared to the same CC-SSTTC scheme utilising a 100-bit STT interleaver. It was also observed that the CC-SSTTC scheme employing a 6400-bit STT interleaver outperformed the STT coded system utilising the same STT interleaver but without channel coding by approximately 5.7 dB at BER = $10^4$.