www.pudn.com > layer1.rar > ctm_defines.h

/* 
******************************************************************************* 
* 
*      COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH 
*      90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100 
* 
*      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          : ctm_defines.h 
*      Purpose       : Global constants for the Cellular Text Telephone Modem 
* 
******************************************************************************* 
*/ 
#ifndef ctm_defines_h 
#define ctm_defines_h "$Id: $" 
 
#ifndef MAX 
#define MAX(A, B)  ((A) > (B) ? (A) : (B)) 
#endif 
 
#define MAX_IDLE_SYMB        5  /* Number of Idle Symbols at End of Burst    */ 
#define CHC_RATE             4  /* Rate of the Error Protection              */ 
#define CHC_K                5  /* Constraint length of Error Protection     */ 
#define SYMB_LEN            40  /* Length of one CTM symbol                  */ 
 
/* The following constant determines whether the signal processing takes */ 
/* place sample-by-sample or frame-by-frame (160 samples per frame)      */ 
// #define LENGTH_TONE_VEC  160  /* signal frame size                         */ 
#define LENGTH_TONE_VEC      1  /* signal frame size                         */ 
 
/* Number of bits that are processed during each call of the main loop   */ 
//LN March 13, 2002 
//#define LENGTH_TX_BITS  MAX(2, 2*LENGTH_TONE_VEC/SYMB_LEN)  
#define LENGTH_TX_BITS   2 
//LN   
 
#define BITS_PER_SYMB        8  /* bits per symbol                           */ 
 
#define NCYCLES_0            2  /* Number of periods for symbol #0           */ 
#define NCYCLES_1            3  /* Number of periods for symbol #1           */ 
#define NCYCLES_2            4  /* Number of periods for symbol #2           */ 
#define NCYCLES_3            5  /* Number of periods for symbol #3           */ 
 
#define THRESHOLD_RELIABILITY_FOR_SUPPRESSING_OUTPUT  100 
#define THRESHOLD_RELIABILITY_FOR_XCORR               200 
#define THRESHOLD_RELIABILITY_FOR_GOING_OFFLINE       100 
#define MAX_NUM_UNRELIABLE_GROSS_BITS                 400 
 
#define NUM_BITS_GUARD_INTERVAL   6       /* length of silence after a burst */ 
 
#define WAIT_SYNC_REL_THRESHOLD_0 20316   /* = 0.62*32768 */ 
#define WAIT_SYNC_REL_THRESHOLD_1 17039   /* = 0.52*32768 */ 
#define WAIT_SYNC_REL_THRESHOLD_2 23265   /* = 0.71*32768 */ 
#define RESYNC_REL_THRESHOLD      26542   /* = 0.81*32768 */ 
 
#define GUARD_BIT_SYMBOL     0  /* "magic number" indicating that a          */ 
//                              /* bit shall be muted                        */ 
 
#define intlvB               8  /* Interleaver block length                  */ 
#define intlvD               2  /* Interleaver block distance (interlace)    */ 
 
#define demodSyncLns         1  /* Nr of demodulator sync lines              */ 
#define deintSyncLns         0  /* Nr of deinterleaver sync lines            */ 
 
#define IDLE_SYMB         0x16  /* UCS code for Idle Symbol                  */ 
#define ENQU_SYMB         0x05  /* UCS code for Enquiry Symbol               */ 
 
#if LENGTH_TONE_VEC==160 
#define ENQUIRY_TIMEOUT     20  /* number of frames for negotiation          */ 
#else 
#define ENQUIRY_TIMEOUT   (1320/5) //19*160  
#endif 
 
#define NUM_ENQUIRY_BURSTS   3  /* number of enquiry attempts                */ 
 
#define NUM_MUTE_ROWS        4  /* duration of muting interval, 4 rows=80ms  */ 
#define RESYNC_SEQ_LENGTH   32  /* must be a multiple of intlvB              */ 
 
#define NUM_BITS_BETWEEN_RESYNC  352 // 352 = 320+32 
/* 352 is a multiple of CHC_RATE, intlvB, and BITS_PER_SYMB,                 */ 
/* and must be greater than  intlvB*((intlvB-1)*intlvD+NUM_MUTE_ROWS         */ 
 
#define SILENCE_PERIOD 32 
#define EARLY_SILENCE_PERIOD SILENCE_PERIOD-2  
#define LATE_SILENCE_PERIOD SILENCE_PERIOD+2 
#define PLAYBACK_VOLUME      0xC000 /* volume for sound card playback        */ 
 
//#define DEBUG_OUTPUT  /* comment this out for regular operation mode!     */ 
 
#endif