Performance of frame oriented turbo codes on UMTS channel with various termination schemes

This paper presents simulation results of frame oriented turbo codes on a simplified CDMA channel together with a classical scheme of similar complexity, that is a concatenation of convolutional code (K=9) with Reed Solomon code. Various trellis termination schemes are envisaged and in particular FOCTC (frame oriented convolutional turbo code) which is a type of self-terminating scheme. A new serial turbo decoding method of this latter scheme is presented as it performs better than the proposed parallel decoding scheme presented previously with equal complexity. At last, according to an analysis on an AWGN channel, the importance of interleaver design is underlined.