LTENR_CodeBlockSegmentation.c

/************************************************************************************
* Copyright (C) 2023                                                                *
* TETCOS, Bangalore. India                                                          *
*                                                                                   *
* Tetcos owns the intellectual property rights in the Product and its content.      *
* The copying, redistribution, reselling or publication of any or all of the        *
* Product or its content without express prior written consent of Tetcos is         *
* prohibited. Ownership and / or any other right relating to the software and all   *
* intellectual property rights therein shall remain at all times with Tetcos.       *
*                                                                                   *
* This source code is licensed per the NetSim license agreement.                    *
*                                                                                   *
* No portion of this source code may be used as the basis for a derivative work,    *
* or used, for any purpose other than its intended use per the NetSim license       *
* agreement.                                                                        *
*                                                                                   *
* This source code and the algorithms contained within it are confidential trade    *
* secrets of TETCOS and may not be used as the basis for any other software,        *
* hardware, product or service.                                                     *
*                                                                                   *
* Author:    Shashi Kant Suman                                                      *
*                                                                                   *
* ----------------------------------------------------------------------------------*/
 
#pragma region HEADER_FILES
#include "stdafx.h"
#include "LTENR_Spectrum.h"
#include "LTENR_AMCTable.h"
#include "LTENR_MAC.h"
#include "LTENR_PHY.h"
#include "LTENR_Multiplexing.h"
#include "LTENR_Spectrum.h"
#pragma endregion
 
#pragma region CBSSIZE
 
int LTENR_Mutiplexer_LDPC_SelectBaseGraph(double TBS, double R) 
{
    if (TBS <= 292 || (TBS <= 3824 && R <= 0.67) || (R <= 0.25)) return 2;
    return 1;
}
 
void LTENR_Multiplexer_ComputeCodeBlockSize(int LDPCG, UINT TBS, UINT* C, UINT* cbs, UINT* cbs_)
{
    UINT Kcb = 0;
    double Kb = 0, K = 0.0, Zc = 384;
    int L = 0;
    if (LDPCG == 1)
    {
        Kcb = 8448;
        Kb = 22;
    }
    else
    {
        Kcb = 3840;
        if (TBS > 640) Kb = 10;
        else if (TBS > 560) Kb = 9;
        else if (TBS > 192) Kb = 8;
        else Kb = 6;
    }
 
    if (TBS > Kcb)
    {
        L = 24;
        *C = ceil(TBS * 1.0 / (Kcb - L));
        TBS = TBS + (*C) * L;
    }
    else
        *C = 1;
 
    double K_ = (ceil(TBS / (8.0 * (*C)))) * 8.0;
 
    int LDPC_len = sizeof LDPCLiftingSizeTable / sizeof LDPCLiftingSizeTable[0];
    for (int i = 0; i < LDPC_len; i++)
    {
        if (Kb * (double)LDPCLiftingSizeTable[i].LiftingSize > K_)
        {
            Zc = LDPCLiftingSizeTable[i].LiftingSize;
            break;
        }
    }
 
    if (LDPCG == 1)
    {
        K = 22 * Zc;// Code Block Size
    }
    else {
        K = 10 * Zc;// Code Block Size
    }
 
    *cbs = K;
    *cbs_ = K_;
}
 
#pragma endregion