FreeCalypso > hg > fc-magnetite
view src/cs/layer1/gtt_include/ctm/conv_poly.h @ 27:c39e9d96c464
drivers_flash.lib done
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 29 Sep 2016 14:15:41 +0000 |
parents | 945cf7f506b2 |
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/* ******************************************************************************* * * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH * * The program(s) may be used and/or copied only with the * written permission from Ericsson or in accordance * with the terms and conditions stipulated in the agreement or * contract under which the program(s) have been supplied. * ******************************************************************************* * * File : conv_poly.h * Purpose : Header file for conv_poly.c * Author : Francisco Javier Gil Gomez * ******************************************************************************* */ #ifndef conv_poly_h #define conv_poly_h #include "ctm_defines.h" /* CHC_RATE, CHC_K */ /* The constants CHC_RATE (rate of the channel codec) and */ /* CHC_K (constraint length) are defined in ctm_defines */ #define NUM_NODES (1<<(CHC_K-1)) /* MUST BE 2^(CHC_K-1) */ #define BLOCK 5 /* We perform the analysis of the */ // /* paths along BLOCK*CHC_K steps */ /* POLYXYZ = Polynomial for generating an optimum short constraint */ /* length convolutional code with rate = 1/X and constraint length = Y */ /* Polynoms for rate = 1/2 */ #define POLY23A 0x7 #define POLY23B 0x5 #define POLY24A 0XF #define POLY24B 0XB #define POLY25A 0X17 #define POLY25B 0X19 #define POLY26A 0X2F #define POLY26B 0X35 #define POLY27A 0X4F #define POLY27B 0X6D #define POLY28A 0X9F #define POLY28B 0XE5 #define POLY29A 0X1AF #define POLY29B 0X11D /* Polynoms for rate = 1/3 */ #define POLY33A 0x7 #define POLY33B 0x7 #define POLY33C 0x5 #define POLY34A 0xF #define POLY34B 0xB #define POLY34C 0xD #define POLY35A 0x1F #define POLY35B 0x1B #define POLY35C 0x15 #define POLY36A 0x2F #define POLY36B 0x2B #define POLY36C 0x3D #define POLY37A 0x4F #define POLY37B 0x57 #define POLY37C 0x6D #define POLY38A 0xEF #define POLY38B 0x9B #define POLY38C 0xA9 /* Polynoms for rate = 1/4 */ /* cf. Lin and Costello, "Error Control Coding: Fundamentals and Applications" */ #define POLY43A 0x5 #define POLY43B 0x7 #define POLY43C 0x7 #define POLY43D 0x7 #define POLY44A 0xB #define POLY44B 0xD #define POLY44C 0xD #define POLY44D 0xF #define POLY45A 0x15 #define POLY45B 0x17 #define POLY45C 0x1B #define POLY45D 0x1F #define POLY46A 0x2B #define POLY46B 0x37 #define POLY46C 0x39 #define POLY46D 0x3D #define POLY47A 0x5D #define POLY47B 0x5D #define POLY47C 0x67 #define POLY47D 0x73 #define POLY48A 0x9D #define POLY48B 0xBD #define POLY48C 0xCB #define POLY48D 0xEF #define POLY49A 0x133 #define POLY49B 0x15D #define POLY49C 0x1DB #define POLY49D 0x1E5 typedef struct { WORD16 impulse_response[CHC_RATE*CHC_K]; WORD16 temp[CHC_RATE*CHC_K]; } conv_encoder_t; typedef struct { WORD32 metric; /* Metric of the node after updating */ WORD32 oldmetric; /* Metric of the node before updating */ WORD16 base_output; /* Output of the node when the input is 0 */ WORD16 continue_path_from; /* Last node from which the actual node will continue the path */ WORD16 new_entry; /* Value to be added to the path (0 or 1) */ WORD16 path[BLOCK*CHC_K]; /* Path ending in the node */ WORD16 temppath[BLOCK*CHC_K]; /* Temp path used for the updating */ } node_t; typedef struct { node_t nodes[NUM_NODES]; WORD16 number_of_steps; } viterbi_t; void polynomials(WORD16 rate, WORD16 k, WORD16* polya, WORD16* polyb, WORD16* polyc, WORD16* polyd); #endif