这是一套完整的支持wimax 16e协议CTC的编译码程序，

主程序在demo.c

译码器：tcdecoder.c

编码器：tcencoder.c-/* This program simulates the classical turbo encoding-decoding system on PC.*/

/* It uses parallel concatenated convolutional codes described in Figure 2.9 in Chapter 2.*/

/* Two component RSC (Recursive Systematic Convolutional) encoders are used.　　　　　　　*/

/* First encoder is terminated with tails bits. (Info+ tail) bits are scrambled and　　　*/

/* passed to the second encoder, while second encoder is left open without tail bits.　　 */



/* Random information bits are modulated into+1/-1, and transmitted through an AWGN channel.*/

/* Interleavers are randomly generated for each frame.*/



/* Log-MAP algorithm without quantization or approximation is used.*/

/* By making use of ln(e^x+e^y) = max (x,y)+ ln(1+e^(-abs(x-y))), */

/* the Log-MAP is simplified with a look-up table for the correction term.*/

/* When the approximation ln(e^x+e^y) = max (x,y) is, we have MAX-Log-MAP.*/



/* To set the number of iterations, change the globle variable "DECITER". To set the fr