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Use 4 different Costas arrays to prevent false syncs as received frames move

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through the analysis window.

Add a random 77-bit vector to each message so that tone transitions occur
even if the message contains a long string of 0 or 1 (like a CQ).

Add alternative sync calculation as an option (sync2), for testing.

Add basic framework for AP decoding.
This commit is contained in:
Steve Franke
2019-02-05 19:18:50 -06:00
parent 91e3dbdf20
commit 71cb6d9f50
5 changed files with 148 additions and 55 deletions
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widgets/mainwindow.cpp
+6 -5
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@@ -163,10 +163,10 @@ extern "C" {
void chkcall_(char* w, char* basc_call, bool cok, int len1, int len2);
void ft4_decode_(char* cdatetime, float* tbuf, int* nfa, int* nfb, int* nfqso,
short int id[], int* ndecodes, char* mycall6, char* hiscall6,
int* nrx, char* line, char* ddir, int len1, int len2, int len3,
int len4, int len5);
void ft4_decode_(char* cdatetime, float* tbuf, int* nfa, int* nfb, int* nQSOProgress,
int* nfqso, short int id[], int* ndecodes, char* mycall6,
char* hiscall6, int* nrx, char* line, char* ddir, int len1, int len2,
int len3, int len4, int len5);
void get_ft4msg_(int* idecode, int* nrx, char* line, int len);
@@ -8659,11 +8659,12 @@ void MainWindow::ft4Data(int k)
int nrx=-1;
int nfa=m_wideGraph->nStartFreq();
int nfb=m_wideGraph->Fmax();
int nQSOProgress=m_QSOProgress;
QString dataDir;
dataDir = m_config.writeable_data_dir ().absolutePath ();
char ddir[512];
strncpy(ddir,dataDir.toLatin1(), sizeof (ddir) - 1);
ft4_decode_(cdatetime,&tbuf,&nfa,&nfb,&nfqso,id,&ndecodes,mycall6,hiscall6,
ft4_decode_(cdatetime,&tbuf,&nfa,&nfb,&nQSOProgress,&nfqso,id,&ndecodes,mycall6,hiscall6,
&nrx,&line[0],&ddir[0],17,6,6,61,512);
line[60]=0;
// if(ndecodes>0) {