Code-matched interleaver for turbo codes

In this paper, we research the code-matched interleaver´s application condition and design method for turbo codes. The innovation is that firstly we give the parameters according to which we devise the code-matched interleavers combined with different generator matrix. Secondly, a modified code-matched interleaver design method is proposed in this paper. Compared with the code-matched interleaver design method given in (W. Feng et al., 2002), this modified code-matched interleaver´s complexity is decreased when the interleaver size is longer while the effect that improve the code error performance at moderate to high signal-to-noise ratio is not decreased. The results are given when the input data is random sequence generated by the computer.