Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-examples / python / usrp / am_rcv.py

diff --git a/gnuradio-examples/python/usrp/am_rcv.py b/gnuradio-examples/python/usrp/am_rcv.py
deleted file mode 100755 (executable)
index 2908dcb..0000000
--- a/gnuradio-examples/python/usrp/am_rcv.py
+++ /dev/null
@@ -1,115 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr, eng_notation
-from gnuradio import audio
-from gnuradio import usrp
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-import sys
-import math
-
-from gnuradio.wxgui import stdgui, fftsink
-import wx
-
-class am_rx_graph (stdgui.gui_flow_graph):
-    def __init__(self,frame,panel,vbox,argv):
-        stdgui.gui_flow_graph.__init__ (self,frame,panel,vbox,argv)
-
-        station = parseargs(argv[1:])
-        offset_freq = 30e3
-        IF_freq = offset_freq - station
-
-        adc_rate = 64e6
-        usrp_decim = 250
-        if_rate = adc_rate / usrp_decim               # 256 kHz
-        if_decim = 4
-        demod_rate = if_rate / if_decim        # 64 kHz
-        audio_decimation = 2
-        audio_rate = demod_rate / audio_decimation  # 16 kHz
-        
-        # usrp is data source
-        src = usrp.source_c (0, usrp_decim)
-        src.set_rx_freq (0, IF_freq)
-        actual_IF_freq =src.rx_freq(0)
-        actual_offset = actual_IF_freq + station
-        
-        #print actual_IF_freq
-        #print actual_offset
- 
-        src.set_pga(0,20)
-        # sound card as final sink
-        audio_sink = audio.sink (int (audio_rate))
-        
-        channel_coeffs = \
-                       gr.firdes.low_pass (1.0,           # gain
-                                           if_rate,   # sampling rate
-                                           9e3,         # low pass cutoff freq
-                                           10e3,         # width of trans. band
-                                           gr.firdes.WIN_HANN)
-
-        ddc =  gr.freq_xlating_fir_filter_ccf (if_decim,channel_coeffs,-actual_offset,if_rate)
-
-        magblock = gr.complex_to_mag()
-        volumecontrol = gr.multiply_const_ff(.003)
-
-        # Deemphasis.  Is this necessary on AM?
-        TAU  = 75e-6  # 75us in US, 50us in EUR
-        fftaps = [ 1 - math.exp(-1/TAU/if_rate), 0]
-        fbtaps= [ 0 , math.exp(-1/TAU/if_rate) ]
-        
-        deemph = gr.iir_filter_ffd(fftaps,fbtaps)
-
-        # compute FIR filter taps for audio filter
-        width_of_transition_band = audio_rate / 8
-        audio_coeffs = gr.firdes.low_pass (1.0,            # gain
-                                           if_rate,      # sampling rate
-                                           9e3,         #audio_rate/2 - width_of_transition_band,
-                                           4e3,         # width_of_transition_band,
-                                           gr.firdes.WIN_HANN)
-        
-        # input: float; output: float
-        audio_filter = gr.fir_filter_fff (audio_decimation, audio_coeffs)
-
-
-
-        
-        print len(channel_coeffs)
-        print len(audio_coeffs)
-        
-        # now wire it all together
-        self.connect (src, ddc)
-        self.connect (ddc, magblock)
-        self.connect (magblock, volumecontrol)
-        self.connect (volumecontrol,deemph)
-        self.connect (deemph,audio_filter)
-        self.connect (audio_filter, (audio_sink, 0))
-
-        if 1:
-            pre_demod = fftsink.fft_sink_c (self, panel, title="Pre-Demodulation", fft_size=128, sample_rate=if_rate)
-            self.connect (src, pre_demod)
-            vbox.Add (pre_demod.win, 1, wx.EXPAND)
-
-        if 0:
-            post_demod = fftsink.fft_sink_c (self, panel, title="Post Demodulation", fft_size=256, sample_rate=demod_rate)
-            self.connect (ddc, post_demod)
-            vbox.Add (post_demod.win, 1, wx.EXPAND)
-
-        if 0:
-            post_filt = fftsink.fft_sink_f (self, panel, title="Post Filter", fft_size=512, sample_rate=audio_rate)
-            self.connect (magblock,post_filt)
-            vbox.Add (post_filt.win, 1, wx.EXPAND)
-        
-def parseargs (args):
-    nargs = len (args)
-    if nargs == 1:
-        freq1 = float (args[0]) * 1e3
-    else:
-        sys.stderr.write ('usage: am_rcv freq1\n')
-        sys.exit (1)
-
-    return freq1
-
-if __name__ == '__main__':
-    app = stdgui.stdapp (am_rx_graph, "AM RX")
-    app.MainLoop ()
-