A design of double-helical Turbo-code interleaver

Short frame interleaver is a key technique for voice and data transmission communication systems to ensure real-time decoding and low complexity of hardware.A novel interleaver,called double-helical interleaver,is proposed in this paper.It improves decoding performance by adopting helical reading and helical readout to get the possibly big minimal-codeword-distance and improve the codeword distance spectrum.Computer simulation results proved that this algorithm has better performances compared with interleavers using other regulations in the same condition.