The design of turbo en-decoders with orthogonal interleavers

Nowadays, the cell phone users are increasing very rapid, but the wireless resource is limited. In this paper, we present a new approach of designing turbo en-decoders in which interleaver maps are orthogonal and the turbo en-decoders can be used to increase the capacity of CDMA systems. The orthogonal interleavers are selected by computer. In this paper, we simulate the performance of turbo en-decoders with orthogonal interleavers to check the validity of our approach.