An Improved Interleaver Design for Turbo Codes

This paper is aimed at designing of an effective interleaver for parallel concatenated coding schemes which utilizes the weight distribution as design criterion. We present a method here for designing an interleaver for achieving a minimum effective free distance of the code word so that error floor can be decreased. The method is expected to achieve a separation of radicN in the output code word. The proposed design has the advantage that the complexity grows linearly with the interleaver length.