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NXDN Frame Sync Tests and Cmake Option #123

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lwvmobile
2023-05-05 06:15:03 -04:00
parent 4dd2328e10
commit 402b2f0264
4 changed files with 170 additions and 8 deletions
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128
src/dsd_frame_sync.c
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@@ -1277,6 +1277,112 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
}
#ifdef NXDNTESTSYNC //use experimental sync detection based on multiple factors
//NXDN FSW sync and handling - testing with more exact syncs and also inlv (state->max)
//Theory is that pure noise is always much louder than an organized signal
//The state->max inlvl will hinge on the user setting an appropriate gain level
//so, this may not entirely be ideal, loud system may still not decode properly
//currently set to invlv 5000 or ~31% or less audio in level when dividing by 164
//Also, landing on other signal types will probably also
//trigger this without squelch enabled
//moved carrier = 1 and last_cc_synctime to inside of nxdn_frame after
//a good lich parity and known lich value occurs -- still available on
//the 'stable' sync pattern though
else if ((opts->frame_nxdn96 == 1) || (opts->frame_nxdn48 == 1))
{
strncpy (synctest10, (synctest_p - 9), 10); //FSW only
strncpy (synctest19, (synctest_p - 18), 19); //Preamble + FSW
//Using Hard Coded Sync Strings with variations for the areas where the symbol
//error will occur due to the demodulation issues internally
//Preamble plus FSW, proceed right away
if ( (strcmp (synctest19, "3131133313131331131") == 0 ) ||
(strcmp (synctest19, "3131133313331331131") == 0 ) ||
(strcmp (synctest19, "3131133313131331111") == 0 ) ||
(strcmp (synctest19, "3131133313331331111") == 0 ) )
{
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
state->lastsynctype = 28;
if (opts->payload == 1) fprintf (stderr, "\n PANDF ");
if (opts->payload == 1) fprintf (stderr, " %s ", synctest19);
if (opts->payload == 1) fprintf (stderr, " maxlvl %d ", state->max / 164);
if (opts->payload == 1) fprintf (stderr, " minlvl %d ", state->min);
if (state->max < 5000)
return (28);
}
else if ( (strcmp (synctest19, "1313311133131331131") == 0 ) ||
(strcmp (synctest19, "1313311133331331131") == 0 ) ||
(strcmp (synctest19, "1313311133131331111") == 0 ) ||
(strcmp (synctest19, "1313311133331331111") == 0 ) )
{
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
state->lastsynctype = 29;
if (opts->payload == 1) fprintf (stderr, "\n PANDF ");
if (opts->payload == 1) fprintf (stderr, " %s ", synctest19);
if (opts->payload == 1) fprintf (stderr, " maxlvl %d ", state->max / 164);
if (opts->payload == 1) fprintf (stderr, " minlvl %d ", state->min);
if (state->max < 5000)
return (29);
}
else if ( (strcmp (synctest10, "3131331131") == 0 ) ||
(strcmp (synctest10, "3331331131") == 0 ) ||
(strcmp (synctest10, "3131331111") == 0 ) ||
(strcmp (synctest10, "3331331111") == 0 ) )
{
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
if (state->lastsynctype == 28)
{
if (opts->payload == 1) fprintf (stderr, "\n FSW ");
if (opts->payload == 1) fprintf (stderr, " %s ", synctest10);
if (opts->payload == 1) fprintf (stderr, " maxlvl %d ", state->max / 164); //see if we can get max to meet threshold first?
if (opts->payload == 1) fprintf (stderr, " minlvl %d ", state->min);
if (state->max < 5000)
return (28);
}
if (state->max < 5000)
state->lastsynctype = 28;
}
else if ( (strcmp (synctest10, "1313113313") == 0 ) ||
(strcmp (synctest10, "1113113313") == 0 ) ||
(strcmp (synctest10, "1313113333") == 0 ) ||
(strcmp (synctest10, "1113113333") == 0 ) )
{
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
if (state->lastsynctype == 29)
{
if (opts->payload == 1) fprintf (stderr, "\n FSW ");
if (opts->payload == 1) fprintf (stderr, " %s ", synctest10);
if (opts->payload == 1) fprintf (stderr, " maxlvl %d ", state->max / 164);
if (opts->payload == 1) fprintf (stderr, " minlvl %d ", state->min);
if (state->max < 5000)
return (29);
}
if (state->max < 5000)
state->lastsynctype = 29;
}
}
#else //use current 'more stable' NXDN Sync pattern detection
//NXDN FSW sync and handling - moved to very bottom of sync stack for falsing sanity
else if ((opts->frame_nxdn96 == 1) || (opts->frame_nxdn48 == 1))
{
@@ -1286,30 +1392,33 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
//Preamble plus FSW, proceed right away
if ( (strncmperr (synctest19, NXDN_PANDFSW, 19, 1) == 0) )
{
state->carrier = 1;
// state->carrier = 1;
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
state->lastsynctype = 28;
state->last_cc_sync_time = time(NULL);
//if (opts->payload == 1) fprintf (stderr, "PANDF ");
// if (opts->payload == 1) fprintf (stderr, "PANDF ");
// fprintf (stderr, " %s ", synctest19);
return (28);
}
else if ( (strncmperr (synctest19, INV_NXDN_PANDFSW, 19, 1) == 0) )
{
state->carrier = 1;
// state->carrier = 1;
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
state->lastsynctype = 29;
state->last_cc_sync_time = time(NULL);
//if (opts->payload == 1) fprintf (stderr, "PANDF ");
// if (opts->payload == 1) fprintf (stderr, "PANDF ");
// fprintf (stderr, " %s ", synctest19);
return (29);
}
else if ( (strncmperr (synctest10, NXDN_FSW, 10, 1) == 0) )
{
state->carrier = 1;
// state->carrier = 1;
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
@@ -1317,7 +1426,8 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
if (state->lastsynctype == 28)
{
state->last_cc_sync_time = time(NULL);
//if (opts->payload == 1) fprintf (stderr, "FSW ");
// if (opts->payload == 1) fprintf (stderr, "FSW ");
// fprintf (stderr, " %s ", synctest10);
return (28);
}
state->lastsynctype = 28; //need two consecutive patterns to continue
@@ -1326,7 +1436,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
else if ( (strncmperr (synctest10, INV_NXDN_FSW, 10, 1) == 0) )
{
state->carrier = 1;
// state->carrier = 1;
state->offset = synctest_pos;
state->max = ((state->max) + lmax) / 2;
state->min = ((state->min) + lmin) / 2;
@@ -1334,7 +1444,8 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
if (state->lastsynctype == 29)
{
state->last_cc_sync_time = time(NULL);
//if (opts->payload == 1) fprintf (stderr, "FSW ");
// if (opts->payload == 1) fprintf (stderr, "FSW ");
// fprintf (stderr, " %s ", synctest10);
return (29);
}
state->lastsynctype = 29; //need two consecutive patterns to continue
@@ -1342,6 +1453,7 @@ getFrameSync (dsd_opts * opts, dsd_state * state)
}
}
#endif //NXDN Sync Type Selection
} // t >= 10
if (exitflag == 1)