Performance evaluation of turbo codes with code-matched interleaver over inter-symbol interference channel
A performance evaluation method of turbo codes is proposed. For turbo codes with code-matched interleaver, performance is approximately evaluated by using conditional weight enumerating function with input weight greater than two. Performance of turbo codes over an inter-symbol interference (ISI) channel is evaluated by using a combined trellis diagram, into which the trellis diagram of the component code and the trellis diagram of the inter-symbol interference channel are combined. Optimum codes are searched for an ISI channel and for an ISI-free channel with the code matched-interleaver. Simulation results show the evaluated performance is valid.
turbo codes code-matched interleaver inter-symbol interference uniform interleaver