diff options
| author | Piotr Krysik <perper@o2.pl> | 2009-05-06 13:54:03 +0200 |
|---|---|---|
| committer | Piotr Krysik <perper@o2.pl> | 2009-05-06 13:54:03 +0200 |
| commit | b464d0b7e16abe2e1a2ff9aad73409c2b42228dd (patch) | |
| tree | 2c226720fd44636ab9a26b79328e2d6208bee31a /src/python/gsm_findfcch.py | |
| parent | 5027749b23b0b4a49d166aee6712b7de01a3d54c (diff) | |
resampler causes that frequency estimate is getting lower for higher osr
Diffstat (limited to 'src/python/gsm_findfcch.py')
| -rwxr-xr-x | src/python/gsm_findfcch.py | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/python/gsm_findfcch.py b/src/python/gsm_findfcch.py index 7ab9c18..5f85dc2 100755 --- a/src/python/gsm_findfcch.py +++ b/src/python/gsm_findfcch.py @@ -16,12 +16,11 @@ class tune(gr.feval_dd): def __init__(self, top_block): gr.feval_dd.__init__(self) self.top_block = top_block - self.center_freq = 0 + # self.center_freq = 0 def eval(self, freq_offet): - self.center_freq = self.center_freq - freq_offet - self.top_block.set_frequency(self.center_freq) - return self.center_freq - + # self.center_freq = self.center_freq - freq_offet + self.top_block.set_frequency(freq_offet) + return freq_offet class gsm_receiver_first_blood(gr.top_block): def __init__(self): @@ -57,13 +56,13 @@ class gsm_receiver_first_blood(gr.top_block): self.clock_rate = clock_rate self.input_rate = clock_rate / options.decim self.gsm_symb_rate = 1625000.0 / 6.0 - self.sps = self.input_rate / self.gsm_symb_rate + self.sps = self.input_rate / self.gsm_symb_rate / self.options.osr def _ustaw_filtr(self): filter_cutoff = 145e3 filter_t_width = 10e3 offset = 0 - print "input_rate:", self.input_rate, "sample rate:", self.sps, " filter_cutoff:", filter_cutoff, " filter_t_width:", filter_t_width + #print "input_rate:", self.input_rate, "sample rate:", self.sps, " filter_cutoff:", filter_cutoff, " filter_t_width:", filter_t_width filter_taps = gr.firdes.low_pass(1.0, self.input_rate, filter_cutoff, filter_t_width, gr.firdes.WIN_HAMMING) filtr = gr.freq_xlating_fir_filter_ccf(1, filter_taps, offset, self.input_rate) return filtr |