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| author | Johnathan Corgan | 2009-10-03 15:11:30 -0700 |
|---|---|---|
| committer | Johnathan Corgan | 2009-10-13 13:46:18 -0700 |
| commit | f6e6c0b7138e9b8749b6a3b8bd01d5eeabb69947 (patch) | |
| tree | da442bc49577ab7bb1e9359571d86652c233696d /gr-noaa/lib | |
| parent | c39a8c449b6a766ca5496c0f3e255b15c40c690d (diff) | |
| download | gnuradio-f6e6c0b7138e9b8749b6a3b8bd01d5eeabb69947.tar.gz gnuradio-f6e6c0b7138e9b8749b6a3b8bd01d5eeabb69947.tar.bz2 gnuradio-f6e6c0b7138e9b8749b6a3b8bd01d5eeabb69947.zip | |
Added timing adjustment for zero crossings at bit edges
Diffstat (limited to 'gr-noaa/lib')
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_sync_fb.cc | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/gr-noaa/lib/noaa_hrpt_sync_fb.cc b/gr-noaa/lib/noaa_hrpt_sync_fb.cc index f99947f82..9c655b0d9 100644 --- a/gr-noaa/lib/noaa_hrpt_sync_fb.cc +++ b/gr-noaa/lib/noaa_hrpt_sync_fb.cc @@ -67,11 +67,16 @@ noaa_hrpt_sync_fb::general_work(int noutput_items, // Train on zero crossings in center region of symbol if (sign != d_last_sign) { - if (d_phase > 0.25 && d_phase < 0.75) { - float phase_err = d_phase-0.5; - d_phase -= phase_err*d_alpha; // 1st order phase adjustment - d_freq -= phase_err*d_beta; // 2nd order frequency adjustment - } + float phase_err = 0.0; + if (d_phase > 0.25 && d_phase < 0.75) + phase_err = d_phase-0.5; + else if (d_phase >= 0.75) + phase_err = d_phase - 1.0; + else + phase_err = d_phase; + + d_phase -= phase_err*d_alpha; // 1st order phase adjustment + d_freq -= phase_err*d_beta; // 2nd order frequency adjustment d_last_sign = sign; } |