From 5f0bc5a2096012d6a94f72e20190ab8b3e0b4f88 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 12 Oct 2011 17:01:44 -0400
Subject: digital: wip: moved all OFDM examples and blks2impl to gr-digital.
---
.../src/python/gnuradio/blks2impl/ofdm.py | 299 ---------------------
1 file changed, 299 deletions(-)
delete mode 100644 gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py
(limited to 'gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py')
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py
deleted file mode 100644
index 2663f7cf87..0000000000
--- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py
+++ /dev/null
@@ -1,299 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006,2007,2008 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.
-#
-
-import math
-from gnuradio import gr, ofdm_packet_utils
-import gnuradio.gr.gr_threading as _threading
-import psk, qam
-
-from gnuradio.blks2impl.ofdm_receiver import ofdm_receiver
-
-
-# /////////////////////////////////////////////////////////////////////////////
-# mod/demod with packets as i/o
-# /////////////////////////////////////////////////////////////////////////////
-
-class ofdm_mod(gr.hier_block2):
- """
- Modulates an OFDM stream. Based on the options fft_length, occupied_tones, and
- cp_length, this block creates OFDM symbols using a specified modulation option.
-
- Send packets by calling send_pkt
- """
- def __init__(self, options, msgq_limit=2, pad_for_usrp=True):
- """
- Hierarchical block for sending packets
-
- Packets to be sent are enqueued by calling send_pkt.
- The output is the complex modulated signal at baseband.
-
- @param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
- @param msgq_limit: maximum number of messages in message queue
- @type msgq_limit: int
- @param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
- """
-
- gr.hier_block2.__init__(self, "ofdm_mod",
- gr.io_signature(0, 0, 0), # Input signature
- gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
-
- self._pad_for_usrp = pad_for_usrp
- self._modulation = options.modulation
- self._fft_length = options.fft_length
- self._occupied_tones = options.occupied_tones
- self._cp_length = options.cp_length
-
- win = [] #[1 for i in range(self._fft_length)]
-
- # Use freq domain to get doubled-up known symbol for correlation in time domain
- zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
- ksfreq = known_symbols_4512_3[0:self._occupied_tones]
- for i in range(len(ksfreq)):
- if((zeros_on_left + i) & 1):
- ksfreq[i] = 0
-
- # hard-coded known symbols
- preambles = (ksfreq,)
-
- padded_preambles = list()
- for pre in preambles:
- padded = self._fft_length*[0,]
- padded[zeros_on_left : zeros_on_left + self._occupied_tones] = pre
- padded_preambles.append(padded)
-
- symbol_length = options.fft_length + options.cp_length
-
- mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
- arity = mods[self._modulation]
-
- rot = 1
- if self._modulation == "qpsk":
- rot = (0.707+0.707j)
-
- if(self._modulation.find("psk") >= 0):
- rotated_const = map(lambda pt: pt * rot, psk.gray_constellation[arity])
- elif(self._modulation.find("qam") >= 0):
- rotated_const = map(lambda pt: pt * rot, qam.constellation[arity])
- #print rotated_const
- self._pkt_input = gr.ofdm_mapper_bcv(rotated_const, msgq_limit,
- options.occupied_tones, options.fft_length)
-
- self.preambles = gr.ofdm_insert_preamble(self._fft_length, padded_preambles)
- self.ifft = gr.fft_vcc(self._fft_length, False, win, True)
- self.cp_adder = gr.ofdm_cyclic_prefixer(self._fft_length, symbol_length)
- self.scale = gr.multiply_const_cc(1.0 / math.sqrt(self._fft_length))
-
- self.connect((self._pkt_input, 0), (self.preambles, 0))
- self.connect((self._pkt_input, 1), (self.preambles, 1))
- self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
-
- if options.verbose:
- self._print_verbage()
-
- if options.log:
- self.connect(self._pkt_input, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
- "ofdm_mapper_c.dat"))
- self.connect(self.preambles, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
- "ofdm_preambles.dat"))
- self.connect(self.ifft, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
- "ofdm_ifft_c.dat"))
- self.connect(self.cp_adder, gr.file_sink(gr.sizeof_gr_complex,
- "ofdm_cp_adder_c.dat"))
-
- def send_pkt(self, payload='', eof=False):
- """
- Send the payload.
-
- @param payload: data to send
- @type payload: string
- """
- if eof:
- msg = gr.message(1) # tell self._pkt_input we're not sending any more packets
- else:
- # print "original_payload =", string_to_hex_list(payload)
- pkt = ofdm_packet_utils.make_packet(payload, 1, 1, self._pad_for_usrp, whitening=True)
-
- #print "pkt =", string_to_hex_list(pkt)
- msg = gr.message_from_string(pkt)
- self._pkt_input.msgq().insert_tail(msg)
-
- def add_options(normal, expert):
- """
- Adds OFDM-specific options to the Options Parser
- """
- normal.add_option("-m", "--modulation", type="string", default="bpsk",
- help="set modulation type (bpsk, qpsk, 8psk, qam{16,64}) [default=%default]")
- expert.add_option("", "--fft-length", type="intx", default=512,
- help="set the number of FFT bins [default=%default]")
- expert.add_option("", "--occupied-tones", type="intx", default=200,
- help="set the number of occupied FFT bins [default=%default]")
- expert.add_option("", "--cp-length", type="intx", default=128,
- help="set the number of bits in the cyclic prefix [default=%default]")
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
- def _print_verbage(self):
- """
- Prints information about the OFDM modulator
- """
- print "\nOFDM Modulator:"
- print "Modulation Type: %s" % (self._modulation)
- print "FFT length: %3d" % (self._fft_length)
- print "Occupied Tones: %3d" % (self._occupied_tones)
- print "CP length: %3d" % (self._cp_length)
-
-
-class ofdm_demod(gr.hier_block2):
- """
- Demodulates a received OFDM stream. Based on the options fft_length, occupied_tones, and
- cp_length, this block performs synchronization, FFT, and demodulation of incoming OFDM
- symbols and passes packets up the a higher layer.
-
- The input is complex baseband. When packets are demodulated, they are passed to the
- app via the callback.
- """
-
- def __init__(self, options, callback=None):
- """
- Hierarchical block for demodulating and deframing packets.
-
- The input is the complex modulated signal at baseband.
- Demodulated packets are sent to the handler.
-
- @param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
- @param callback: function of two args: ok, payload
- @type callback: ok: bool; payload: string
- """
- gr.hier_block2.__init__(self, "ofdm_demod",
- gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
- gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
-
-
- self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
-
- self._modulation = options.modulation
- self._fft_length = options.fft_length
- self._occupied_tones = options.occupied_tones
- self._cp_length = options.cp_length
- self._snr = options.snr
-
- # Use freq domain to get doubled-up known symbol for correlation in time domain
- zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
- ksfreq = known_symbols_4512_3[0:self._occupied_tones]
- for i in range(len(ksfreq)):
- if((zeros_on_left + i) & 1):
- ksfreq[i] = 0
-
- # hard-coded known symbols
- preambles = (ksfreq,)
-
- symbol_length = self._fft_length + self._cp_length
- self.ofdm_recv = ofdm_receiver(self._fft_length, self._cp_length,
- self._occupied_tones, self._snr, preambles,
- options.log)
-
- mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
- arity = mods[self._modulation]
-
- rot = 1
- if self._modulation == "qpsk":
- rot = (0.707+0.707j)
-
- if(self._modulation.find("psk") >= 0):
- rotated_const = map(lambda pt: pt * rot, psk.gray_constellation[arity])
- elif(self._modulation.find("qam") >= 0):
- rotated_const = map(lambda pt: pt * rot, qam.constellation[arity])
- #print rotated_const
-
- phgain = 0.25
- frgain = phgain*phgain / 4.0
- self.ofdm_demod = gr.ofdm_frame_sink(rotated_const, range(arity),
- self._rcvd_pktq,
- self._occupied_tones,
- phgain, frgain)
-
- self.connect(self, self.ofdm_recv)
- self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
- self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
-
- # added output signature to work around bug, though it might not be a bad
- # thing to export, anyway
- self.connect(self.ofdm_recv.chan_filt, self)
-
- if options.log:
- self.connect(self.ofdm_demod, gr.file_sink(gr.sizeof_gr_complex*self._occupied_tones, "ofdm_frame_sink_c.dat"))
- else:
- self.connect(self.ofdm_demod, gr.null_sink(gr.sizeof_gr_complex*self._occupied_tones))
-
- if options.verbose:
- self._print_verbage()
-
- self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
-
- def add_options(normal, expert):
- """
- Adds OFDM-specific options to the Options Parser
- """
- normal.add_option("-m", "--modulation", type="string", default="bpsk",
- help="set modulation type (bpsk or qpsk) [default=%default]")
- expert.add_option("", "--fft-length", type="intx", default=512,
- help="set the number of FFT bins [default=%default]")
- expert.add_option("", "--occupied-tones", type="intx", default=200,
- help="set the number of occupied FFT bins [default=%default]")
- expert.add_option("", "--cp-length", type="intx", default=128,
- help="set the number of bits in the cyclic prefix [default=%default]")
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
- def _print_verbage(self):
- """
- Prints information about the OFDM demodulator
- """
- print "\nOFDM Demodulator:"
- print "Modulation Type: %s" % (self._modulation)
- print "FFT length: %3d" % (self._fft_length)
- print "Occupied Tones: %3d" % (self._occupied_tones)
- print "CP length: %3d" % (self._cp_length)
-
-
-
-class _queue_watcher_thread(_threading.Thread):
- def __init__(self, rcvd_pktq, callback):
- _threading.Thread.__init__(self)
- self.setDaemon(1)
- self.rcvd_pktq = rcvd_pktq
- self.callback = callback
- self.keep_running = True
- self.start()
-
-
- def run(self):
- while self.keep_running:
- msg = self.rcvd_pktq.delete_head()
- ok, payload = ofdm_packet_utils.unmake_packet(msg.to_string())
- if self.callback:
- self.callback(ok, payload)
-
-# Generating known symbols with:
-# i = [2*random.randint(0,1)-1 for i in range(4512)]
-
-known_symbols_4512_3 = [-1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, -1, 1, 1, -1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1, 1, 1, 1, 1, 1, -1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1, 1, -1, 1, -1, 1, -1, 1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, 1, -1, 1, 1, 1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, 1, 1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1, -1, -1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, -1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1, 1, -1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, 1, -1, -1, 1, 1, 1, -1, 1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, -1, 1, 1, 1, 1, 1, 1, 1, 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