diff options
Diffstat (limited to 'gsm-tvoid/src/python/gsm_scan.py')
| -rwxr-xr-x | gsm-tvoid/src/python/gsm_scan.py | 61 |
1 files changed, 50 insertions, 11 deletions
diff --git a/gsm-tvoid/src/python/gsm_scan.py b/gsm-tvoid/src/python/gsm_scan.py index 5e3edfc..478b460 100755 --- a/gsm-tvoid/src/python/gsm_scan.py +++ b/gsm-tvoid/src/python/gsm_scan.py @@ -173,7 +173,7 @@ class app_flow_graph(stdgui.gui_flow_graph): #decoder options - parser.add_option("-D", "--decoder", type="string", default="f", + parser.add_option("-D", "--decoder", type="string", default="c", help="Select decoder block to use. (c)omplex,(f)loat [default=%default]") parser.add_option("-E", "--equalizer", type="string", default="none", help="Type of equalizer to use. none, fixed-dfe [default=%default]") @@ -280,9 +280,6 @@ class app_flow_graph(stdgui.gui_flow_graph): if options.print_console.count('D'): popts |= gsm.PRINT_DUMMY - if options.print_console.count('C'): - popts |= gsm.PRINT_BITS | gsm.PRINT_CORR_BITS - if options.print_console.count('x'): popts |= gsm.PRINT_BITS | gsm.PRINT_HEX @@ -292,6 +289,9 @@ class app_flow_graph(stdgui.gui_flow_graph): elif options.print_console.count('b'): popts |= gsm.PRINT_BITS + elif options.print_console.count('C'): + popts |= gsm.PRINT_BITS | gsm.PRINT_CORR_BITS + print "Print flags: 0x%8.8x\n" %(popts) self.burst.d_print_options = popts @@ -357,7 +357,7 @@ class app_flow_graph(stdgui.gui_flow_graph): print >> sys.stderr, "% offset = ", percent_offset, "clock = ", clock_rate self.clock_rate = clock_rate - self.input_rate = clock_rate / options.decim + self.input_rate = clock_rate / options.decim #TODO: what about usrp value? self.gsm_symb_rate = 1625000.0 / 6.0 self.sps = self.input_rate / self.gsm_symb_rate @@ -394,18 +394,41 @@ class app_flow_graph(stdgui.gui_flow_graph): gain_omega, 0.5, #mu gain_mu, - 0.3) #omega_relative_limit, + 0.5) #omega_relative_limit, self.burst = gsm.burst_ff(self.burst_cb) self.connect(self.filter, self.demod, self.clocker, self.burst) #################### + def setup_f_flowgraph2(self): + #This version uses a complex clock recovery prior to demod + #one advantage is the availability of clock error output in the cc version + + #configure clock recovery + gain_mu = 0.01 + gain_omega = .25 * gain_mu * gain_mu # critically damped + self.clocker = gr.clock_recovery_mm_cc( self.sps, + gain_omega, + 0.5, #mu + gain_mu, + 0.3) #omega_relative_limit, + + # configure demodulator + # adjust the phase gain for sampling rate + self.demod = gr.quadrature_demod_cf(self.sps); + + self.burst = gsm.burst_ff(self.burst_cb) + self.connect(self.filter, self.clocker, self.demod, self.burst) + +#################### def setup_c_flowgraph(self): #use the sink version if burst scope not selected - if self.scopes.count("b"): - self.burst = gsm.burst_cf(self.burst_cb,input_rate) - else: - self.burst = gsm.burst_sink_c(self.burst_cb,input_rate) +# if self.scopes.count("b"): +# self.burst = gsm.burst_cf(self.burst_cb,self.input_rate) +# else: +# self.burst = gsm.burst_sink_c(self.burst_cb,self.input_rate) + + self.burst = gsm.burst_cf(self.burst_cb,self.input_rate) self.connect(self.filter, self.burst) @@ -418,7 +441,7 @@ class app_flow_graph(stdgui.gui_flow_graph): #Filter FFT if self.scopes.count("F"): - self.filter_fft_scope = fftsink.fft_sink_c (self, self.panel, fft_size=1024, sample_rate=input_rate) + self.filter_fft_scope = fftsink.fft_sink_c (self, self.panel, fft_size=1024, sample_rate=self.input_rate) self.connect(self.filter, self.filter_fft_scope) #Burst Scope @@ -433,8 +456,13 @@ class app_flow_graph(stdgui.gui_flow_graph): self.connect(self.demod, self.demod_scope) if self.scopes.count("c"): + #f_flowgraph self.clocked_scope = scopesink.scope_sink_f(self, self.panel, sample_rate=self.gsm_symb_rate,v_scale=1) self.connect(self.clocker, self.clocked_scope) + #for testing: f_flowgraph2 + #self.clocked_scope = scopesink.scope_sink_c(self, self.panel, sample_rate=self.gsm_symb_rate,v_scale=1) + #self.connect(self.clocker, self.clocked_scope) + #self.connect((self.clocker,1),(self.clocked_scope,1)) #################### def configure_burst_decoder(self): @@ -496,6 +524,7 @@ class app_flow_graph(stdgui.gui_flow_graph): self.setup_c_flowgraph() elif options.decoder.count("f"): self.setup_f_flowgraph() + #self.setup_f_flowgraph2() self.configure_burst_decoder() @@ -630,6 +659,16 @@ class app_flow_graph(stdgui.gui_flow_graph): print >> out, 'known_count: ',n_known if n_total: print >> out, '%known: ', 100.0 * n_known / n_total + + #timing + if self.options.decoder.count("c"): + omega = self.burst.get_omega() + else: + omega = self.clocker.omega() + + percent_sps = omega / self.sps + print >> out, 'omega: %f (%f / %f)' % (omega,self.sps,percent_sps) + print >> out, "" #################### |