FreeCalypso > hg > fc-magnetite

annotate src/cs/layer1/gtt_include/ctm/conv_poly.h @ 206:6aadfa0d10c4

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UPM enabled in the GPF/GPRS config for the hybrid build
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 14 Oct 2016 06:54:58 +0000
parents 945cf7f506b2
children
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1 /*
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2 *******************************************************************************
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3 *
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
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5 *
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6 * The program(s) may be used and/or copied only with the
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7 * written permission from Ericsson or in accordance
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8 * with the terms and conditions stipulated in the agreement or
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9 * contract under which the program(s) have been supplied.
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10 *
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11 *******************************************************************************
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12 *
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13 * File : conv_poly.h
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14 * Purpose : Header file for conv_poly.c
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15 * Author : Francisco Javier Gil Gomez
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16 *
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17 *******************************************************************************
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18 */
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19
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20 #ifndef conv_poly_h
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21 #define conv_poly_h
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22
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23 #include "ctm_defines.h" /* CHC_RATE, CHC_K */
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24
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25 /* The constants CHC_RATE (rate of the channel codec) and */
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26 /* CHC_K (constraint length) are defined in ctm_defines */
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27
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28 #define NUM_NODES (1<<(CHC_K-1)) /* MUST BE 2^(CHC_K-1) */
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29 #define BLOCK 5 /* We perform the analysis of the */
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30 // /* paths along BLOCK*CHC_K steps */
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31
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32
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33 /* POLYXYZ = Polynomial for generating an optimum short constraint */
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34 /* length convolutional code with rate = 1/X and constraint length = Y */
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35
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36 /* Polynoms for rate = 1/2 */
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37
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38 #define POLY23A 0x7
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39 #define POLY23B 0x5
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40
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41 #define POLY24A 0XF
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42 #define POLY24B 0XB
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43
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44 #define POLY25A 0X17
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45 #define POLY25B 0X19
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46
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47 #define POLY26A 0X2F
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48 #define POLY26B 0X35
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49
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50 #define POLY27A 0X4F
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51 #define POLY27B 0X6D
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52
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53 #define POLY28A 0X9F
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54 #define POLY28B 0XE5
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55
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56 #define POLY29A 0X1AF
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57 #define POLY29B 0X11D
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58
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59 /* Polynoms for rate = 1/3 */
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60
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61 #define POLY33A 0x7
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62 #define POLY33B 0x7
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63 #define POLY33C 0x5
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64
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65 #define POLY34A 0xF
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66 #define POLY34B 0xB
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67 #define POLY34C 0xD
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68
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69 #define POLY35A 0x1F
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70 #define POLY35B 0x1B
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71 #define POLY35C 0x15
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72
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73 #define POLY36A 0x2F
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74 #define POLY36B 0x2B
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75 #define POLY36C 0x3D
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76
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77 #define POLY37A 0x4F
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78 #define POLY37B 0x57
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79 #define POLY37C 0x6D
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80
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81 #define POLY38A 0xEF
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82 #define POLY38B 0x9B
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83 #define POLY38C 0xA9
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84
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85 /* Polynoms for rate = 1/4 */
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86 /* cf. Lin and Costello,
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87 "Error Control Coding: Fundamentals and Applications" */
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88
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89 #define POLY43A 0x5
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90 #define POLY43B 0x7
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91 #define POLY43C 0x7
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92 #define POLY43D 0x7
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93
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94 #define POLY44A 0xB
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95 #define POLY44B 0xD
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96 #define POLY44C 0xD
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97 #define POLY44D 0xF
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98
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99 #define POLY45A 0x15
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100 #define POLY45B 0x17
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101 #define POLY45C 0x1B
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102 #define POLY45D 0x1F
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103
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104 #define POLY46A 0x2B
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105 #define POLY46B 0x37
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106 #define POLY46C 0x39
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107 #define POLY46D 0x3D
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108
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109 #define POLY47A 0x5D
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110 #define POLY47B 0x5D
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111 #define POLY47C 0x67
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112 #define POLY47D 0x73
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113
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114 #define POLY48A 0x9D
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115 #define POLY48B 0xBD
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116 #define POLY48C 0xCB
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117 #define POLY48D 0xEF
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118
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119 #define POLY49A 0x133
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120 #define POLY49B 0x15D
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121 #define POLY49C 0x1DB
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122 #define POLY49D 0x1E5
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123
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124 typedef struct
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125 {
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126 WORD16 impulse_response[CHC_RATE*CHC_K];
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127 WORD16 temp[CHC_RATE*CHC_K];
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128 } conv_encoder_t;
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129
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130 typedef struct
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131 {
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132 WORD32 metric; /* Metric of the node after updating */
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133 WORD32 oldmetric; /* Metric of the node before updating */
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134 WORD16 base_output; /* Output of the node when the input is 0 */
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135 WORD16 continue_path_from; /* Last node from which the actual node
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136 will continue the path */
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137 WORD16 new_entry; /* Value to be added to the path (0 or 1) */
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138 WORD16 path[BLOCK*CHC_K]; /* Path ending in the node */
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139 WORD16 temppath[BLOCK*CHC_K]; /* Temp path used for the updating */
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140
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141 } node_t;
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142
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143 typedef struct
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144 {
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145 node_t nodes[NUM_NODES];
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146 WORD16 number_of_steps;
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147 } viterbi_t;
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148
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149 void polynomials(WORD16 rate, WORD16 k,
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150 WORD16* polya, WORD16* polyb,
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151 WORD16* polyc, WORD16* polyd);
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152
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153 #endif