#!/usr/bin/env python3 # -*- coding: utf-8 -*- # # SPDX-License-Identifier: GPL-3.0 # # GNU Radio Python Flow Graph # Title: QPSK Sim # Author: Naoki Sean Pross, Sara Cinzia Halter # GNU Radio version: 3.8.2.0 from gnuradio import blocks import numpy from gnuradio import channels from gnuradio.filter import firdes from gnuradio import digital from gnuradio import gr import sys import signal from argparse import ArgumentParser from gnuradio.eng_arg import eng_float, intx from gnuradio import eng_notation import fadingui import numpy as np class qpsk_sim(gr.top_block): def __init__(self): gr.top_block.__init__(self, "QPSK Sim") ################################################## # Variables ################################################## self.testvec = testvec = [0x1f, 0x35] + [0x12, 0x48, 0x12, 0x45] self.sps = sps = 4 self.nfilts = nfilts = 32 self.excess_bw = excess_bw = 0.35 self.samp_rate = samp_rate = 1e6 self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts) self.qpsk_const = qpsk_const = digital.constellation_qpsk().base() self.frame_len = frame_len = len(testvec) +4 self.carrier_freq = carrier_freq = 2.4e9 self.access_code_symbols = access_code_symbols = [(-0.7071067811865475-0.7071067811865475j), (0.7071067811865475-0.7071067811865475j), (0.7071067811865475+0.7071067811865475j), (0.7071067811865475+0.7071067811865475j), (-0.7071067811865475-0.7071067811865475j), (0.7071067811865475+0.7071067811865475j), (0.7071067811865475-0.7071067811865475j), (0.7071067811865475-0.7071067811865475j)] ################################################## # Blocks ################################################## self.fadingui_phasecorrection_0 = fadingui.phasecorrection(frame_len) self.fadingui_netsink_4 = fadingui.netsink(address='udp://localhost:31417', dtype="complex", vlen=1) self.fadingui_netsink_3 = fadingui.netsink(address='udp://localhost:31419', dtype="complex", vlen=1) self.fadingui_netsink_1 = fadingui.netsink(address='udp://localhost:31418', dtype="complex", vlen=1) self.fadingui_netsink_0_0 = fadingui.netsink(address='udp://localhost:31415', dtype="float", vlen=1) self.fadingui_netsink_0 = fadingui.netsink(address='udp://localhost:31416', dtype="complex", vlen=1) self.fadingui_ber_0 = fadingui.ber(vgl=list(np.zeros(frame_len)), vlen=frame_len,address='udp://localhost:31420') self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, 2 * np.pi / 100, rrc_taps, 32, 16, 1.5, 1) self.digital_corr_est_cc_0 = digital.corr_est_cc(access_code_symbols, 1, len(access_code_symbols) // 2, 0.9, digital.THRESHOLD_ABSOLUTE) self.digital_constellation_modulator_0 = digital.generic_mod( constellation=qpsk_const, differential=False, samples_per_symbol=sps, pre_diff_code=True, excess_bw=excess_bw, verbose=False, log=False) self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(qpsk_const) self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(15, 1, 2e-3, 1) self.channels_selective_fading_model_0 = channels.selective_fading_model( 8, ((2*carrier_freq)/(3*10e8))/samp_rate, False, 4.0, 21, (0,1.8), (1,0.12), 8 ) self.channels_channel_model_0 = channels.channel_model( noise_voltage=100e-3, frequency_offset=2e-3, epsilon=1.0, taps=[np.exp(1j * 30 / 180 * np.pi)], noise_seed=243, block_tags=False) self.blocks_vector_source_x_0 = blocks.vector_source_b(testvec, True, 1, []) self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True) self.blocks_tagged_stream_align_0 = blocks.tagged_stream_align(gr.sizeof_char*1, 'frame_start') self.blocks_stream_to_vector_0 = blocks.stream_to_vector(gr.sizeof_char*1, frame_len) self.blocks_stream_mux_0 = blocks.stream_mux(gr.sizeof_char*1, [len(testvec), 4]) self.blocks_repack_bits_bb_0 = blocks.repack_bits_bb(2, 8, "", False, gr.GR_LSB_FIRST) self.blocks_complex_to_mag_0 = blocks.complex_to_mag(1) self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 255, 400))), True) ################################################## # Connections ################################################## self.connect((self.analog_random_source_x_0, 0), (self.blocks_stream_mux_0, 1)) self.connect((self.blocks_complex_to_mag_0, 0), (self.fadingui_netsink_0_0, 0)) self.connect((self.blocks_repack_bits_bb_0, 0), (self.blocks_stream_to_vector_0, 0)) self.connect((self.blocks_stream_mux_0, 0), (self.digital_constellation_modulator_0, 0)) self.connect((self.blocks_stream_to_vector_0, 0), (self.fadingui_ber_0, 0)) self.connect((self.blocks_tagged_stream_align_0, 0), (self.blocks_repack_bits_bb_0, 0)) self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0)) self.connect((self.blocks_vector_source_x_0, 0), (self.blocks_stream_mux_0, 0)) self.connect((self.channels_channel_model_0, 0), (self.channels_selective_fading_model_0, 0)) self.connect((self.channels_selective_fading_model_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0)) self.connect((self.channels_selective_fading_model_0, 0), (self.fadingui_netsink_0, 0)) self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_corr_est_cc_0, 0)) self.connect((self.digital_cma_equalizer_cc_0, 0), (self.fadingui_netsink_1, 0)) self.connect((self.digital_constellation_decoder_cb_0, 0), (self.blocks_tagged_stream_align_0, 0)) self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0)) self.connect((self.digital_corr_est_cc_0, 1), (self.blocks_complex_to_mag_0, 0)) self.connect((self.digital_corr_est_cc_0, 0), (self.fadingui_phasecorrection_0, 0)) self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0)) self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.fadingui_netsink_4, 0)) self.connect((self.fadingui_phasecorrection_0, 0), (self.digital_constellation_decoder_cb_0, 0)) self.connect((self.fadingui_phasecorrection_0, 0), (self.fadingui_netsink_3, 0)) def get_testvec(self): return self.testvec def set_testvec(self, testvec): self.testvec = testvec self.set_frame_len(len(self.testvec) +4) self.blocks_vector_source_x_0.set_data(self.testvec, []) def get_sps(self): return self.sps def set_sps(self, sps): self.sps = sps self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts)) def get_nfilts(self): return self.nfilts def set_nfilts(self, nfilts): self.nfilts = nfilts self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts)) def get_excess_bw(self): return self.excess_bw def set_excess_bw(self, excess_bw): self.excess_bw = excess_bw self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts)) def get_samp_rate(self): return self.samp_rate def set_samp_rate(self, samp_rate): self.samp_rate = samp_rate self.blocks_throttle_0.set_sample_rate(self.samp_rate) self.channels_selective_fading_model_0.set_fDTs(((2*self.carrier_freq)/(3*10e8))/self.samp_rate) def get_rrc_taps(self): return self.rrc_taps def set_rrc_taps(self, rrc_taps): self.rrc_taps = rrc_taps self.digital_pfb_clock_sync_xxx_0.update_taps(self.rrc_taps) def get_qpsk_const(self): return self.qpsk_const def set_qpsk_const(self, qpsk_const): self.qpsk_const = qpsk_const def get_frame_len(self): return self.frame_len def set_frame_len(self, frame_len): self.frame_len = frame_len def get_carrier_freq(self): return self.carrier_freq def set_carrier_freq(self, carrier_freq): self.carrier_freq = carrier_freq self.channels_selective_fading_model_0.set_fDTs(((2*self.carrier_freq)/(3*10e8))/self.samp_rate) def get_access_code_symbols(self): return self.access_code_symbols def set_access_code_symbols(self, access_code_symbols): self.access_code_symbols = access_code_symbols self.digital_corr_est_cc_0.set_mark_delay(len(self.access_code_symbols) // 2) def main(top_block_cls=qpsk_sim, options=None): if gr.enable_realtime_scheduling() != gr.RT_OK: print("Error: failed to enable real-time scheduling.") tb = top_block_cls() def sig_handler(sig=None, frame=None): tb.stop() tb.wait() sys.exit(0) signal.signal(signal.SIGINT, sig_handler) signal.signal(signal.SIGTERM, sig_handler) tb.start() tb.wait() if __name__ == '__main__': main()