btcinit.c

wimax802.16e中的BTC编码仿真程序

/*
*********************************************************************************
* Copyright (c) National Mobile Communications Research Laboratory. 
* All rights reserved.
* 
* FILE NAME : BTCinit.c
* ABSTRUCT:
*	This file is the C file for BTC parameter allocation.
*	
* AUTHOR:	Zhang Tao	2007-02-12
*
*********************************************************************************
*/

/*
*********************************************************************************
*                               INCLUDE FILES
*********************************************************************************
*/

#include <stdio.h>
#include "BTCstruct.h"
/*
*********************************************************************************
*                              Function Definition
*********************************************************************************
*/

/*
*********************************************************************************
* NAME:		BTCInit  
* PURPOSE:	perform the BTC parameter allocation.
*
* Input:	encoded_len: the length of the encoded bits.
*			rate: 1 for 1/2; 3 for 3/4.
*				
* Output:	BTC : the parameter for the BTC.
*					
* AUTHOR: 	Zhang Tao	2007-02-12	
* 
*********************************************************************************
*/

void BTCInit(int encoded_len,int rate,BTCstruct *BTC)
{
	switch(encoded_len)
	{
	case 96:
		if(rate==1)
			(*BTC).msg_len = 48;
		else
			(*BTC).msg_len = 72;
		break;
	case 192:
		if(rate==1)
			(*BTC).msg_len = 96;
		else
			(*BTC).msg_len = 160;
		break;
	case 288:
		if(rate==1)
			(*BTC).msg_len = 144;
		else
			(*BTC).msg_len = 200;
		break;
	case 384:
		if(rate==1)
			(*BTC).msg_len = 184;
		else
			(*BTC).msg_len = 280;
		break;
	case 480:
		(*BTC).msg_len = 248;
		break;
	case 576:
		(*BTC).msg_len = 320;		
		break;
	}

	switch((*BTC).msg_len)
	{
	case 48:
		(*BTC).kx = 7; (*BTC).ky = 26; (*BTC).nx = 8; (*BTC).ny = 32; (*BTC).r_type = 0; 
		(*BTC).c_type = 4; (*BTC).Ix = 4; (*BTC).Iy = 8; (*BTC).B = 0; (*BTC).Q = 6;
		break;
	case 72:
		(*BTC).kx = 15; (*BTC).ky = 15; (*BTC).nx = 16; (*BTC).ny = 16; (*BTC).r_type = 1; 
		(*BTC).c_type = 1; (*BTC).Ix = 6; (*BTC).Iy = 6; (*BTC).B = 4; (*BTC).Q = 5;
		break;
	case 96:
		(*BTC).kx = 31; (*BTC).ky = 11; (*BTC).nx = 32; (*BTC).ny = 16; (*BTC).r_type = 2;
		(*BTC).c_type = 3; (*BTC).Ix = 14; (*BTC).Iy = 5; (*BTC).B = 6; (*BTC).Q = 0;
		break;
	case 144:
		(*BTC).kx = 31; (*BTC).ky = 11; (*BTC).nx = 32; (*BTC).ny = 16; (*BTC).r_type = 2; 
		(*BTC).c_type = 3; (*BTC).Ix = 5; (*BTC).Iy = 5; (*BTC).B = 9; (*BTC).Q = 3; 
		break;
	case 160:
		(*BTC).kx = 15; (*BTC).ky = 15; (*BTC).nx = 16; (*BTC).ny = 16; (*BTC).r_type = 1; 
		(*BTC).c_type = 1; (*BTC).Ix = 2; (*BTC).Iy = 2; (*BTC).B = 4; (*BTC).Q = 5;
		break;
	case 200:
		(*BTC).kx = 7; (*BTC).ky = 57; (*BTC).nx = 8; (*BTC).ny = 64; (*BTC).r_type = 0;
		(*BTC).c_type = 5; (*BTC).Ix = 2; (*BTC).Iy = 16; (*BTC).B = 0; (*BTC).Q = 5; 
		break;
	case 184:
		(*BTC).kx = 26; (*BTC).ky = 11; (*BTC).nx = 32; (*BTC).ny = 16; (*BTC).r_type = 4; 
		(*BTC).c_type = 3; (*BTC).Ix = 4; (*BTC).Iy = 2; (*BTC).B = 8; (*BTC).Q = 6; 
		break;
	case 280:
		(*BTC).kx = 26; (*BTC).ky = 15; (*BTC).nx = 32; (*BTC).ny = 16; (*BTC).r_type = 4; 
		(*BTC).c_type = 1; (*BTC).Ix = 0; (*BTC).Iy = 4; (*BTC).B = 0; (*BTC).Q = 6; 
		break;
	case 248:
		(*BTC).kx = 26; (*BTC).ky = 26; (*BTC).nx = 32; (*BTC).ny = 32; (*BTC).r_type = 4; 
		(*BTC).c_type = 4; (*BTC).Ix = 10; (*BTC).Iy = 10; (*BTC).B = 4; (*BTC).Q = 4; 
		break;
	case 320:
		(*BTC).kx = 26; (*BTC).ky = 26; (*BTC).nx = 32; (*BTC).ny = 32; (*BTC).r_type = 4;
		(*BTC).c_type = 4; (*BTC).Ix = 8; (*BTC).Iy = 8; (*BTC).B = 0; (*BTC).Q = 4; 
		break;
	}
}