diff options
Diffstat (limited to 'gnuradio-core/src')
7 files changed, 0 insertions, 812 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am index 3fb23caef..e3d83aeee 100644 --- a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am @@ -40,12 +40,6 @@ grblkspython_PYTHON = \ cpm.py \ nbfm_rx.py \ nbfm_tx.py \ - ofdm.py \ - ofdm_receiver.py \ - ofdm_sync_fixed.py \ - ofdm_sync_ml.py \ - ofdm_sync_pnac.py \ - ofdm_sync_pn.py \ pkt.py \ psk.py \ qam.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 b040d8c7f..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py +++ /dev/null @@ -1,305 +0,0 @@ - -# -# Copyright 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. -# - -import math -from numpy import fft -from gnuradio import gr, ofdm_packet_utils -import gnuradio.gr.gr_threading as _threading -import psk, qam - -from gnuradio.blksimpl.ofdm_receiver import ofdm_receiver - - -# ///////////////////////////////////////////////////////////////////////////// -# mod/demod with packets as i/o -# ///////////////////////////////////////////////////////////////////////////// - -class ofdm_mod(gr.hier_block): - """ - 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, fg, 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 fg: flow graph - @type fg: flow graph - @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 - """ - - 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, - known_symbols_4512_1[0:self._occupied_tones], - known_symbols_4512_2[0:self._occupied_tones]) - - 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)) - - fg.connect((self._pkt_input, 0), (self.preambles, 0)) - fg.connect((self._pkt_input, 1), (self.preambles, 1)) - fg.connect(self.preambles, self.ifft, self.cp_adder, self.scale) - - if options.verbose: - self._print_verbage() - - if options.log: - fg.connect(self._pkt_input, gr.file_sink(gr.sizeof_gr_complex*options.fft_length, - "ofdm_mapper_c.dat")) - - gr.hier_block.__init__(self, fg, None, self.scale) - - 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 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 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_block): - """ - 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, fg, 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 fg: flow graph - @type fg: flow graph - @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 - """ - 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 - ksfreq = known_symbols_4512_3[0:self._occupied_tones] - for i in range(len(ksfreq)): - if(i&1): - ksfreq[i] = 0 - - zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0)) - zeros_on_right = self._fft_length - self._occupied_tones - zeros_on_left - ks0 = zeros_on_left*[0.0,] - ks0.extend(ksfreq) - ks0.extend(zeros_on_right*[0.0,]) - - ks0time = fft.ifft(ks0) - # ADD SCALING FACTOR - ks0time = ks0time.tolist() - - # hard-coded known symbols - preambles = (ks0time, - known_symbols_4512_1[0:self._occupied_tones], - known_symbols_4512_2[0:self._occupied_tones]) - - symbol_length = self._fft_length + self._cp_length - self.ofdm_recv = ofdm_receiver(fg, 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 - self.ofdm_demod = gr.ofdm_frame_sink(rotated_const, range(arity), - self._rcvd_pktq, - self._occupied_tones) - - fg.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0)) - fg.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1)) - - if options.verbose: - self._print_verbage() - - gr.hier_block.__init__(self, fg, self.ofdm_recv, None) - 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_200_1 = [1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0] - -known_symbols_200_2 = [-1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0] - - -known_symbols_4512_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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b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_receiver.py deleted file mode 100644 index d16d2e294..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_receiver.py +++ /dev/null @@ -1,64 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -import math -from gnuradio import gr -from gnuradio.blksimpl.ofdm_sync_ml import ofdm_sync_ml -from gnuradio.blksimpl.ofdm_sync_pn import ofdm_sync_pn -from gnuradio.blksimpl.ofdm_sync_pnac import ofdm_sync_pnac - -class ofdm_receiver(gr.hier_block): - def __init__(self, fg, fft_length, cp_length, occupied_tones, snr, ks, logging=False): - self.fg = fg - - bw = (float(occupied_tones) / float(fft_length)) / 2.0 - tb = bw*0.08 - chan_coeffs = gr.firdes.low_pass (1.0, # gain - 1.0, # sampling rate - bw+tb, # midpoint of trans. band - tb, # width of trans. band - gr.firdes.WIN_HAMMING) # filter type - self.chan_filt = gr.fft_filter_ccc(1, chan_coeffs) - - win = [1 for i in range(fft_length)] - - SYNC = "pn" - if SYNC == "ml": - self.ofdm_sync = ofdm_sync_ml(fg, fft_length, cp_length, snr, logging) - elif SYNC == "pn": - self.ofdm_sync = ofdm_sync_pn(fg, fft_length, cp_length, logging) - elif SYNC == "pnac": - self.ofdm_sync = ofdm_sync_pnac(fg, fft_length, cp_length, ks[0]) - - self.fft_demod = gr.fft_vcc(fft_length, True, win, True) - self.ofdm_corr = gr.ofdm_correlator(occupied_tones, fft_length, - cp_length, ks[1], ks[2]) - - self.fg.connect(self.chan_filt, self.ofdm_sync, self.fft_demod, self.ofdm_corr) - - if logging: - self.fg.connect(self.chan_filt, gr.file_sink(gr.sizeof_gr_complex, "chan_filt_c.dat")) - self.fg.connect(self.fft_demod, gr.file_sink(gr.sizeof_gr_complex*fft_length, "fft_out_c.dat")) - self.fg.connect(self.ofdm_corr, gr.file_sink(gr.sizeof_gr_complex*occupied_tones, "ofdm_corr_out_c.dat")) - self.fg.connect((self.ofdm_corr,1), gr.file_sink(1, "found_corr_b.dat")) - - gr.hier_block.__init__(self, fg, self.chan_filt, self.ofdm_corr) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py deleted file mode 100644 index b56f65660..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py +++ /dev/null @@ -1,41 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -import math -from gnuradio import gr - -class ofdm_sync_fixed(gr.hier_block): - def __init__(self, fg, fft_length, cp_length, snr): - self.fg = fg - - # Use a fixed trigger point instead of sync block - data = (fft_length+cp_len)*[0,] - data[(fft_length+cp_len)-1] = 1 - peak_trigger = gr.vector_source_b(data, True) - - self.fg.connect(peak_trigger, (self.sampler,1)) - - if 1: - self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, - "ofdm_sync_fixed-sampler_c.dat")) - - gr.hier_block.__init__(self, fg, (self.sampler,0), self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py deleted file mode 100644 index d58f56cff..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py +++ /dev/null @@ -1,135 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -import math -from gnuradio import gr - -class ofdm_sync_ml(gr.hier_block): - def __init__(self, fg, fft_length, cp_length, snr, logging): - ''' Maximum Likelihood OFDM synchronizer: - J. van de Beek, M. Sandell, and P. O. Borjesson, "ML Estimation - of Time and Frequency Offset in OFDM Systems," IEEE Trans. - Signal Processing, vol. 45, no. 7, pp. 1800-1805, 1997. - ''' - - self.fg = fg - - # FIXME: when converting to hier_block2's, the output signature - # should be the output of the divider (the normalized peaks) and - # the angle value out of the sample and hold block - - self.input = gr.add_const_cc(0) - - SNR = 10.0**(snr/10.0) - rho = SNR / (SNR + 1.0) - symbol_length = fft_length + cp_length - - # ML Sync - - # Energy Detection from ML Sync - - # Create a delay line - self.delay = gr.delay(gr.sizeof_gr_complex, fft_length) - self.fg.connect(self.input, self.delay) - - # magnitude squared blocks - self.magsqrd1 = gr.complex_to_mag_squared() - self.magsqrd2 = gr.complex_to_mag_squared() - self.adder = gr.add_ff() - - moving_sum_taps = [rho/2 for i in range(cp_length)] - self.moving_sum_filter = gr.fir_filter_fff(1,moving_sum_taps) - - self.fg.connect(self.input,self.magsqrd1) - self.fg.connect(self.delay,self.magsqrd2) - self.fg.connect(self.magsqrd1,(self.adder,0)) - self.fg.connect(self.magsqrd2,(self.adder,1)) - self.fg.connect(self.adder,self.moving_sum_filter) - - - # Correlation from ML Sync - self.conjg = gr.conjugate_cc(); - self.mixer = gr.multiply_cc(); - - movingsum2_taps = [1.0 for i in range(cp_length)] - self.movingsum2 = gr.fir_filter_ccf(1,movingsum2_taps) - - # Correlator data handler - self.c2mag = gr.complex_to_mag() - self.angle = gr.complex_to_arg() - self.fg.connect(self.input,(self.mixer,1)) - self.fg.connect(self.delay,self.conjg,(self.mixer,0)) - self.fg.connect(self.mixer,self.movingsum2,self.c2mag) - self.fg.connect(self.movingsum2,self.angle) - - # ML Sync output arg, need to find maximum point of this - self.diff = gr.sub_ff() - self.fg.connect(self.c2mag,(self.diff,0)) - self.fg.connect(self.moving_sum_filter,(self.diff,1)) - - #ML measurements input to sampler block and detect - nco_sensitivity = -1.0/fft_length - self.f2c = gr.float_to_complex() - self.sampler = gr.ofdm_sampler(fft_length,symbol_length) - self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) - self.sample_and_hold = gr.sample_and_hold_ff() - self.nco = gr.frequency_modulator_fc(nco_sensitivity) - self.sigmix = gr.multiply_cc() - - # Mix the signal with an NCO controlled by the sync loop - self.fg.connect(self.input, (self.sigmix,0)) - self.fg.connect(self.nco, (self.sigmix,1)) - self.fg.connect(self.sigmix, (self.sampler,0)) - - # use the sync loop values to set the sampler and the NCO - # self.diff = theta - # self.angle = epsilon - - self.fg.connect(self.diff, self.pk_detect) - - use_dpll = 1 - if use_dpll: - self.dpll = gr.dpll_bb(float(symbol_length),0.01) - self.fg.connect(self.pk_detect, self.dpll) - self.fg.connect(self.dpll, (self.sampler,1)) - self.fg.connect(self.dpll, (self.sample_and_hold,1)) - else: - self.fg.connect(self.pk_detect, (self.sampler,1)) - self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) - - self.fg.connect(self.angle, (self.sample_and_hold,0)) - self.fg.connect(self.sample_and_hold, self.nco) - - if logging: - self.fg.connect(self.diff, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-theta_f.dat")) - self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-epsilon_f.dat")) - self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, "ofdm_sync_ml-peaks_b.dat")) - if use_dpll: - self.fg.connect(self.dpll, gr.file_sink(gr.sizeof_char, "ofdm_sync_ml-dpll_b.dat")) - - self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-sigmix_c.dat")) - self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, "ofdm_sync_ml-sampler_c.dat")) - self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-sample_and_hold_f.dat")) - self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-nco_c.dat")) - self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-input_c.dat")) - - gr.hier_block.__init__(self, fg, self.input, self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py deleted file mode 100644 index 56425868f..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py +++ /dev/null @@ -1,135 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -import math -from numpy import fft -from gnuradio import gr - -class ofdm_sync_pn(gr.hier_block): - def __init__(self, fg, fft_length, cp_length, logging=False): - ''' OFDM synchronization using PN Correlation: - T. M. Schmidl and D. C. Cox, "Robust Frequency and Timing - Synchonization for OFDM," IEEE Trans. Communications, vol. 45, - no. 12, 1997. - ''' - - self.fg = fg - - # FIXME: when converting to hier_block2's, the output signature - # should be the output of the divider (the normalized peaks) and - # the angle value out of the sample and hold block - - self.input = gr.add_const_cc(0) - - symbol_length = fft_length + cp_length - - # PN Sync - - # Create a delay line - self.delay = gr.delay(gr.sizeof_gr_complex, fft_length/2) - - # Correlation from ML Sync - self.conjg = gr.conjugate_cc(); - self.corr = gr.multiply_cc(); - - # Create a moving sum filter for the corr output - if 1: - moving_sum_taps = [1.0 for i in range(fft_length//2)] - self.moving_sum_filter = gr.fir_filter_ccf(1,moving_sum_taps) - else: - moving_sum_taps = [complex(1.0,0.0) for i in range(fft_length//2)] - self.moving_sum_filter = gr.fft_filter_ccc(1,moving_sum_taps) - - # Create a moving sum filter for the input - self.inputmag2 = gr.complex_to_mag_squared() - movingsum2_taps = [1.0 for i in range(fft_length//2)] - - if 1: - self.inputmovingsum = gr.fir_filter_fff(1,movingsum2_taps) - else: - self.inputmovingsum = gr.fft_filter_fff(1,movingsum2_taps) - - self.square = gr.multiply_ff() - self.normalize = gr.divide_ff() - - # Get magnitude (peaks) and angle (phase/freq error) - self.c2mag = gr.complex_to_mag_squared() - self.angle = gr.complex_to_arg() - - self.sample_and_hold = gr.sample_and_hold_ff() - - # Mix the signal with an NCO controlled by the sync loop - nco_sensitivity = -2.0/fft_length - self.nco = gr.frequency_modulator_fc(nco_sensitivity) - self.sigmix = gr.multiply_cc() - - #ML measurements input to sampler block and detect - self.sub1 = gr.add_const_ff(-1) - self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) - self.regen = gr.regenerate_bb(symbol_length) - - self.sampler = gr.ofdm_sampler(fft_length,symbol_length) - - self.fg.connect(self.input, self.delay) - self.fg.connect(self.input, (self.corr,0)) - self.fg.connect(self.delay, self.conjg) - self.fg.connect(self.conjg, (self.corr,1)) - self.fg.connect(self.corr, self.moving_sum_filter) - self.fg.connect(self.moving_sum_filter, self.c2mag) - self.fg.connect(self.moving_sum_filter, self.angle) - self.fg.connect(self.angle, (self.sample_and_hold,0)) - self.fg.connect(self.sample_and_hold, self.nco) - - self.fg.connect(self.input, (self.sigmix,0)) - self.fg.connect(self.nco, (self.sigmix,1)) - self.fg.connect(self.sigmix, (self.sampler,0)) - - self.fg.connect(self.input, self.inputmag2, self.inputmovingsum) - self.fg.connect(self.inputmovingsum, (self.square,0)) - self.fg.connect(self.inputmovingsum, (self.square,1)) - self.fg.connect(self.square, (self.normalize,1)) - self.fg.connect(self.c2mag, (self.normalize,0)) - - # Create a moving sum filter for the corr output - matched_filter_taps = [1.0/cp_length for i in range(cp_length)] - self.matched_filter = gr.fir_filter_fff(1,matched_filter_taps) - self.fg.connect(self.normalize, self.matched_filter) - - self.fg.connect(self.matched_filter, self.sub1, self.pk_detect) - self.fg.connect(self.pk_detect, self.regen) - self.fg.connect(self.regen, (self.sampler,1)) - self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) - - - if logging: - self.fg.connect(self.matched_filter, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-mf_f.dat")) - self.fg.connect(self.normalize, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-theta_f.dat")) - self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-epsilon_f.dat")) - self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, "ofdm_sync_pn-peaks_b.dat")) - self.fg.connect(self.regen, gr.file_sink(gr.sizeof_char, "ofdm_sync_pn-regen_b.dat")) - self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-sigmix_c.dat")) - self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, "ofdm_sync_pn-sampler_c.dat")) - self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-sample_and_hold_f.dat")) - self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-nco_c.dat")) - self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-input_c.dat")) - - gr.hier_block.__init__(self, fg, self.input, self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py deleted file mode 100644 index e3774e341..000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py +++ /dev/null @@ -1,126 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -import math -from numpy import fft -from gnuradio import gr - -class ofdm_sync_pnac(gr.hier_block): - def __init__(self, fg, fft_length, cp_length, ks): - self.fg = fg - - # FIXME: when converting to hier_block2's, the output signature - # should be the output of the divider (the normalized peaks) and - # the angle value out of the sample and hold block - - self.input = gr.add_const_cc(0) - - symbol_length = fft_length + cp_length - - # PN Sync - - # autocorrelate with the known symbol - ks = ks[0:fft_length//2] - ks.reverse() - self.crosscorr_filter = gr.fir_filter_ccc(1, ks) - self.fg.connect(self.crosscorr_filter, gr.file_sink(gr.sizeof_gr_complex, "crosscorr.dat")) - - # Create a delay line - self.delay = gr.delay(gr.sizeof_gr_complex, fft_length/2) - - # Correlation from ML Sync - self.conjg = gr.conjugate_cc(); - self.corr = gr.multiply_cc(); - - # Create a moving sum filter for the corr output - moving_sum_taps = [1.0 for i in range(fft_length//2)] - self.moving_sum_filter = gr.fir_filter_ccf(1,moving_sum_taps) - - # Create a moving sum filter for the input - self.inputmag2 = gr.complex_to_mag_squared() - movingsum2_taps = [1.0 for i in range(fft_length/2)] - self.inputmovingsum = gr.fir_filter_fff(1,movingsum2_taps) - self.square = gr.multiply_ff() - self.normalize = gr.divide_ff() - - # Get magnitude (peaks) and angle (phase/freq error) - self.c2mag = gr.complex_to_mag_squared() - self.angle = gr.complex_to_arg() - - self.sample_and_hold = gr.sample_and_hold_ff() - - # Mix the signal with an NCO controlled by the sync loop - nco_sensitivity = -1.0/fft_length - self.nco = gr.frequency_modulator_fc(nco_sensitivity) - self.sigmix = gr.multiply_cc() - - #ML measurements input to sampler block and detect - self.sub1 = gr.add_const_ff(-1) - self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) - - self.sampler = gr.ofdm_sampler(fft_length,symbol_length) - - self.fg.connect(self.input, self.crosscorr_filter) - self.fg.connect(self.crosscorr_filter, self.delay) - self.fg.connect(self.crosscorr_filter, (self.corr,0)) - self.fg.connect(self.delay, self.conjg) - self.fg.connect(self.conjg, (self.corr,1)) - self.fg.connect(self.corr, self.moving_sum_filter) - self.fg.connect(self.moving_sum_filter, self.c2mag) - self.fg.connect(self.moving_sum_filter, self.angle) - self.fg.connect(self.angle, (self.sample_and_hold,0)) - self.fg.connect(self.sample_and_hold, self.nco) - - self.fg.connect(self.input, (self.sigmix,0)) - self.fg.connect(self.nco, (self.sigmix,1)) - self.fg.connect(self.sigmix, (self.sampler,0)) - - self.fg.connect(self.input, self.inputmag2, self.inputmovingsum) - self.fg.connect(self.inputmovingsum, (self.square,0)) - self.fg.connect(self.inputmovingsum, (self.square,1)) - self.fg.connect(self.square, (self.normalize,1)) - self.fg.connect(self.c2mag, (self.normalize,0)) - self.fg.connect(self.normalize, self.sub1, self.pk_detect) - - self.fg.connect(self.pk_detect, (self.sampler,1)) - self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) - - - if 1: - self.fg.connect(self.normalize, gr.file_sink(gr.sizeof_float, - "ofdm_sync_pnac-theta_f.dat")) - self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, - "ofdm_sync_pnac-epsilon_f.dat")) - self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, - "ofdm_sync_pnac-peaks_b.dat")) - self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, - "ofdm_sync_pnac-sigmix_c.dat")) - self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, - "ofdm_sync_pnac-sampler_c.dat")) - self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, - "ofdm_sync_pnac-sample_and_hold_f.dat")) - self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, - "ofdm_sync_pnac-nco_c.dat")) - self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, - "ofdm_sync_pnac-input_c.dat")) - - gr.hier_block.__init__(self, fg, self.input, self.sampler) |