##################################################
# Gnuradio Python Flow Graph
# Title: USRP FLEX Pager Receiver (Single Channel)
-# Generated: Sun Oct 11 14:15:06 2009
+# Generated: Sat Oct 17 11:46:38 2009
##################################################
from gnuradio import eng_notation
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import ConfigParser
-import os
+import os, math
import wx
class usrp_rx_flex(grc_wxgui.top_block_gui):
# Variables
##################################################
self.config_filename = config_filename = os.environ["HOME"]+"/.gnuradio/config.conf"
+ self.symbol_rate = symbol_rate = 3200
self._saved_channel_config = ConfigParser.ConfigParser()
self._saved_channel_config.read(config_filename)
try: saved_channel = self._saved_channel_config.getint("gr-pager", "channel")
try: saved_band_freq = self._saved_band_freq_config.getfloat("gr-pager", "band_center")
except: saved_band_freq = 930.5125e6
self.saved_band_freq = saved_band_freq
- self.decim = decim = 16
+ self.deviation = deviation = 4800
+ self.decim = decim = 20
+ self.adc_rate = adc_rate = 64e6
+ self.sample_rate = sample_rate = adc_rate/decim
+ self.passband = passband = 2*(deviation+symbol_rate)
+ self.channel_rate = channel_rate = 8*3200
self.channel = channel = saved_channel
self.band_freq = band_freq = saved_band_freq
- self.adc_rate = adc_rate = 64e6
self._saved_rx_gain_config = ConfigParser.ConfigParser()
self._saved_rx_gain_config.read(config_filename)
try: saved_rx_gain = self._saved_rx_gain_config.getint("gr-pager", "rx_gain")
try: saved_offset = self._saved_offset_config.getfloat("gr-pager", "freq_offset")
except: saved_offset = 0
self.saved_offset = saved_offset
- self.sample_rate = sample_rate = adc_rate/decim
self.freq = freq = band_freq+(channel-61)*25e3
- self.channel_rate = channel_rate = 25e3
+ self.channel_taps = channel_taps = firdes.low_pass(10, sample_rate, passband/2.0, (channel_rate-passband)/2.0)
self.rx_gain = rx_gain = saved_rx_gain
self.offset = offset = saved_offset
+ self.nchan_taps = nchan_taps = len(channel_taps)
+ self.ma_ntaps = ma_ntaps = channel_rate/symbol_rate
self.freq_text = freq_text = freq
- self.channel_taps = channel_taps = firdes.low_pass(10**1, sample_rate, 10e3, 2.5e3)
+ self.demod_k = demod_k = 3*channel_rate/(2*math.pi*deviation)
self.channel_decim = channel_decim = int(sample_rate/channel_rate)
##################################################
value=self.channel,
callback=self.set_channel,
label="Channel",
- converter=forms.float_converter(),
+ converter=forms.int_converter(),
proportion=0,
)
self._channel_slider = forms.slider(
maximum=120,
num_steps=119,
style=wx.SL_HORIZONTAL,
- cast=float,
+ cast=int,
proportion=1,
)
self.GridAdd(_channel_sizer, 0, 1, 1, 1)
value=self.rx_gain,
callback=self.set_rx_gain,
label="Analog Gain",
- converter=forms.float_converter(),
+ converter=forms.int_converter(),
proportion=0,
)
self._rx_gain_slider = forms.slider(
maximum=100,
num_steps=100,
style=wx.SL_HORIZONTAL,
- cast=float,
+ cast=int,
proportion=1,
)
self.GridAdd(_rx_gain_sizer, 0, 4, 1, 1)
##################################################
# Blocks
##################################################
+ self.fm_demod = gr.quadrature_demod_cf(demod_k)
self.gr_freq_xlating_fir_filter_xxx_0 = gr.freq_xlating_fir_filter_ccc(channel_decim, (channel_taps), band_freq-freq+offset, sample_rate)
+ self.gr_moving_average_xx_0 = gr.moving_average_ff(8, 1.0/8.0, 4000)
self.usrp_source = grc_usrp.simple_source_c(which=0, side="A", rx_ant="RXA")
self.usrp_source.set_decim_rate(decim)
self.usrp_source.set_frequency(band_freq, verbose=True)
self.displays.GetPage(0).GridAdd(self.wxgui_fftsink2_1.win, 1, 0, 1, 1)
self.wxgui_scopesink2_0 = scopesink2.scope_sink_c(
self.displays.GetPage(1).GetWin(),
- title="Baseband Waveform",
+ title="Channel Waveform",
sample_rate=channel_rate,
- v_scale=1e3,
+ v_scale=8e3,
t_scale=20.0/channel_rate,
ac_couple=False,
xy_mode=False,
num_inputs=1,
)
self.displays.GetPage(1).GridAdd(self.wxgui_scopesink2_0.win, 0, 0, 1, 1)
+ self.wxgui_scopesink2_0_0 = scopesink2.scope_sink_f(
+ self.displays.GetPage(1).GetWin(),
+ title="Baseband",
+ sample_rate=channel_rate,
+ v_scale=1,
+ t_scale=40.0/channel_rate,
+ ac_couple=False,
+ xy_mode=False,
+ num_inputs=1,
+ )
+ self.displays.GetPage(1).GridAdd(self.wxgui_scopesink2_0_0.win, 1, 0, 1, 1)
##################################################
# Connections
self.connect((self.usrp_source, 0), (self.gr_freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.usrp_source, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_scopesink2_0, 0))
+ self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.fm_demod, 0))
+ self.connect((self.fm_demod, 0), (self.gr_moving_average_xx_0, 0))
+ self.connect((self.gr_moving_average_xx_0, 0), (self.wxgui_scopesink2_0_0, 0))
def set_config_filename(self, config_filename):
self.config_filename = config_filename
self._saved_rx_gain_config.set("gr-pager", "rx_gain", str(self.rx_gain))
self._saved_rx_gain_config.write(open(self.config_filename, 'w'))
+ def set_symbol_rate(self, symbol_rate):
+ self.symbol_rate = symbol_rate
+ self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
+ self.set_passband(2*(self.deviation+self.symbol_rate))
+
def set_saved_channel(self, saved_channel):
self.saved_channel = saved_channel
self.set_channel(self.saved_channel)
self.saved_band_freq = saved_band_freq
self.set_band_freq(self.saved_band_freq)
+ def set_deviation(self, deviation):
+ self.deviation = deviation
+ self.set_demod_k(3*self.channel_rate/(2*math.pi*self.deviation))
+ self.set_passband(2*(self.deviation+self.symbol_rate))
+
def set_decim(self, decim):
self.decim = decim
self.set_sample_rate(self.adc_rate/self.decim)
self.usrp_source.set_decim_rate(self.decim)
+ def set_adc_rate(self, adc_rate):
+ self.adc_rate = adc_rate
+ self.set_sample_rate(self.adc_rate/self.decim)
+
+ def set_sample_rate(self, sample_rate):
+ self.sample_rate = sample_rate
+ self.wxgui_fftsink2_0.set_sample_rate(self.sample_rate)
+ self.set_channel_decim(int(self.sample_rate/self.channel_rate))
+ self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+
+ def set_passband(self, passband):
+ self.passband = passband
+ self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+
+ def set_channel_rate(self, channel_rate):
+ self.channel_rate = channel_rate
+ self.wxgui_scopesink2_0.set_sample_rate(self.channel_rate)
+ self.wxgui_fftsink2_1.set_sample_rate(self.channel_rate)
+ self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
+ self.set_channel_decim(int(self.sample_rate/self.channel_rate))
+ self.set_demod_k(3*self.channel_rate/(2*math.pi*self.deviation))
+ self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+ self.wxgui_scopesink2_0_0.set_sample_rate(self.channel_rate)
+
def set_channel(self, channel):
self.channel = channel
self.set_freq(self.band_freq+(self.channel-61)*25e3)
self.set_freq(self.band_freq+(self.channel-61)*25e3)
self.wxgui_fftsink2_0.set_baseband_freq(self.band_freq)
self.usrp_source.set_frequency(self.band_freq)
+ self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
self._saved_band_freq_config = ConfigParser.ConfigParser()
self._saved_band_freq_config.read(self.config_filename)
if not self._saved_band_freq_config.has_section("gr-pager"):
self._saved_band_freq_config.add_section("gr-pager")
self._saved_band_freq_config.set("gr-pager", "band_center", str(self.band_freq))
self._saved_band_freq_config.write(open(self.config_filename, 'w'))
- self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
self._band_freq_text_box.set_value(self.band_freq)
- def set_adc_rate(self, adc_rate):
- self.adc_rate = adc_rate
- self.set_sample_rate(self.adc_rate/self.decim)
-
def set_saved_rx_gain(self, saved_rx_gain):
self.saved_rx_gain = saved_rx_gain
self.set_rx_gain(self.saved_rx_gain)
self.saved_offset = saved_offset
self.set_offset(self.saved_offset)
- def set_sample_rate(self, sample_rate):
- self.sample_rate = sample_rate
- self.set_channel_decim(int(self.sample_rate/self.channel_rate))
- self.set_channel_taps(firdes.low_pass(10**1, self.sample_rate, 10e3, 2.5e3))
- self.wxgui_fftsink2_0.set_sample_rate(self.sample_rate)
-
def set_freq(self, freq):
self.freq = freq
- self.wxgui_fftsink2_1.set_baseband_freq(self.freq)
self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
+ self.wxgui_fftsink2_1.set_baseband_freq(self.freq)
self.set_freq_text(self.freq)
- def set_channel_rate(self, channel_rate):
- self.channel_rate = channel_rate
- self.set_channel_decim(int(self.sample_rate/self.channel_rate))
- self.wxgui_fftsink2_1.set_sample_rate(self.channel_rate)
- self.wxgui_scopesink2_0.set_sample_rate(self.channel_rate)
+ def set_channel_taps(self, channel_taps):
+ self.channel_taps = channel_taps
+ self.gr_freq_xlating_fir_filter_xxx_0.set_taps((self.channel_taps))
+ self.set_nchan_taps(len(self.channel_taps))
def set_rx_gain(self, rx_gain):
self.rx_gain = rx_gain
def set_offset(self, offset):
self.offset = offset
+ self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
self._saved_offset_config = ConfigParser.ConfigParser()
self._saved_offset_config.read(self.config_filename)
if not self._saved_offset_config.has_section("gr-pager"):
self._saved_offset_config.add_section("gr-pager")
self._saved_offset_config.set("gr-pager", "freq_offset", str(self.offset))
self._saved_offset_config.write(open(self.config_filename, 'w'))
- self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
self._offset_slider.set_value(self.offset)
self._offset_text_box.set_value(self.offset)
+ def set_nchan_taps(self, nchan_taps):
+ self.nchan_taps = nchan_taps
+
+ def set_ma_ntaps(self, ma_ntaps):
+ self.ma_ntaps = ma_ntaps
+
def set_freq_text(self, freq_text):
self.freq_text = freq_text
self._freq_text_static_text.set_value(self.freq_text)
- def set_channel_taps(self, channel_taps):
- self.channel_taps = channel_taps
- self.gr_freq_xlating_fir_filter_xxx_0.set_taps((self.channel_taps))
+ def set_demod_k(self, demod_k):
+ self.demod_k = demod_k
def set_channel_decim(self, channel_decim):
self.channel_decim = channel_decim
projects / debian / gnuradio / blobdiff