RA 码及其在通信系统中的应用研究确良：重复累积码；简化译码算法；高斯估计；比特交织编码调制；光纤通 信；码率兼容码；Turbo 码交织器-RA Code and Its Application in Communication System does good: repeat accumulate codes simplify the decoding algorithm Gaussian estimation Bit-Interleaved Coded Modulation op

Turbo decoder under awgn channel. -The input is: uncoded bits,coded bits 1,coded bits2(interleaved), LLR from other source(if use only one turbo code ,fill all zero is ok), numbers of iterations, interleaver between two CC, source bit,decoder id(