From bc0a3ff98377e41fa1e31d448d45b2b377b54cea Mon Sep 17 00:00:00 2001
From: trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 17 Jun 2009 02:14:59 +0000
Subject: Merging trondeau/digital branch r11185:11205 to improve digital
example interfacing and remove redundancy.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@11209 221aa14e-8319-0410-a670-987f0aec2ac5
---
.../python/digital/receive_path_lb.py | 140 ---------------------
1 file changed, 140 deletions(-)
delete mode 100644 gnuradio-examples/python/digital/receive_path_lb.py
(limited to 'gnuradio-examples/python/digital/receive_path_lb.py')
diff --git a/gnuradio-examples/python/digital/receive_path_lb.py b/gnuradio-examples/python/digital/receive_path_lb.py
deleted file mode 100644
index a6bffeeac4..0000000000
--- a/gnuradio-examples/python/digital/receive_path_lb.py
+++ /dev/null
@@ -1,140 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005,2006,2007 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from gnuradio import gr, gru, blks2
-from gnuradio import eng_notation
-import copy
-import sys
-
-# /////////////////////////////////////////////////////////////////////////////
-# receive path
-# /////////////////////////////////////////////////////////////////////////////
-
-class receive_path(gr.hier_block2):
- def __init__(self, demod_class, rx_callback, options):
- gr.hier_block2.__init__(self, "receive_path",
- gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
- gr.io_signature(0, 0, 0)) # Output signature
-
-
- options = copy.copy(options) # make a copy so we can destructively modify
-
- self._verbose = options.verbose
- self._bitrate = options.bitrate # desired bit rate
- self._samples_per_symbol = options.samples_per_symbol # desired samples/symbol
-
- self._rx_callback = rx_callback # this callback is fired when there's a packet available
- self._demod_class = demod_class # the demodulator_class we're using
-
- # Get demod_kwargs
- demod_kwargs = self._demod_class.extract_kwargs_from_options(options)
-
- # Design filter to get actual channel we want
- sw_decim = 1
- chan_coeffs = gr.firdes.low_pass (1.0, # gain
- sw_decim * self._samples_per_symbol, # sampling rate
- 1.0, # midpoint of trans. band
- 0.5, # width of trans. band
- gr.firdes.WIN_HANN) # filter type
- self.channel_filter = gr.fft_filter_ccc(sw_decim, chan_coeffs)
-
- # receiver
- self.packet_receiver = \
- blks2.demod_pkts(self._demod_class(**demod_kwargs),
- access_code=None,
- callback=self._rx_callback,
- threshold=-1)
-
- # Carrier Sensing Blocks
- alpha = 0.001
- thresh = 30 # in dB, will have to adjust
- self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
-
- # Display some information about the setup
- if self._verbose:
- self._print_verbage()
-
- # connect block input to channel filter
- self.connect(self, self.channel_filter)
-
- # connect the channel input filter to the carrier power detector
- self.connect(self.channel_filter, self.probe)
-
- # connect channel filter to the packet receiver
- self.connect(self.channel_filter, self.packet_receiver)
-
- def bitrate(self):
- return self._bitrate
-
- def samples_per_symbol(self):
- return self._samples_per_symbol
-
- def carrier_sensed(self):
- """
- Return True if we think carrier is present.
- """
- #return self.probe.level() > X
- return self.probe.unmuted()
-
- def carrier_threshold(self):
- """
- Return current setting in dB.
- """
- return self.probe.threshold()
-
- def set_carrier_threshold(self, threshold_in_db):
- """
- Set carrier threshold.
-
- @param threshold_in_db: set detection threshold
- @type threshold_in_db: float (dB)
- """
- self.probe.set_threshold(threshold_in_db)
-
-
- def add_options(normal, expert):
- """
- Adds receiver-specific options to the Options Parser
- """
- if not normal.has_option("--bitrate"):
- normal.add_option("-r", "--bitrate", type="eng_float", default=100e3,
- help="specify bitrate [default=%default].")
- normal.add_option("", "--show-rx-gain-range", action="store_true", default=False,
- help="print min and max Rx gain available on selected daughterboard")
- normal.add_option("-v", "--verbose", action="store_true", default=False)
- expert.add_option("-S", "--samples-per-symbol", type="int", default=2,
- help="set samples/symbol [default=%default]")
- expert.add_option("", "--log", action="store_true", default=False,
- help="Log all parts of flow graph to files (CAUTION: lots of data)")
-
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
-
- def _print_verbage(self):
- """
- Prints information about the receive path
- """
- print "\nReceive Path:"
- print "modulation: %s" % (self._demod_class.__name__)
- print "bitrate: %sb/s" % (eng_notation.num_to_str(self._bitrate))
- print "samples/symbol: %3d" % (self._samples_per_symbol)
--
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