Interleaver Design for Short Block Length Turbo Codes

The performance of a Turbo code depends on the interleaver design. There are two major criteria that can be considered in the design of an interleaver. Distance spectrum properties of the code and the correlation of the extrinsic information with the input data are the two major criteria in designing an interleaver. This paper describes a new interleaver design based on these two criteria. Simulation results compare the new interleaver design to different existing interleavers. The distance spectrum properties of the Turbo code are compared for different interleaver choices. A new solution to the interleaver edge effects is proposed here.