Esempio n. 1
0
    def __init__(self):
        gr.top_block.__init__(self)

        usage = "%prog: [options] samples_file"
        parser = OptionParser(option_class=eng_option, usage=usage)
        parser.add_option("-m", "--dab-mode", type="int", default=1,
            help="DAB mode [default=%default]")
        parser.add_option("-c", "--complex", action="store_true", default=False,
            help="Sample file is float complex (64 bit per sample, 32 I + 32 Q) format")
        parser.add_option("-n", "--config", type="string", default="channel.conf",
            help="DAB+ channel configuration file [default=%default]")
        
        (options, args) = parser.parse_args ()
        
        if len(args)<1:
            print "error: need file with samples"
            sys.exit(1)
        else:
            filename = args[0]
            if options.complex:
                src = gr.file_source(gr.sizeof_gr_complex, filename, True)
            else:
                sinput = gr.file_source(gr.sizeof_short, filename, True)
                src = gr.interleaved_short_to_complex()
                self.connect(sinput, src)

        self.conf = options.config
        
        mode=options.dab_mode
        param = dabp.parameters(mode)
        # null symbol detector
        samples_per_null_sym=param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(0, mode)
        # depuncturer
        punc = dabp.depuncturer_fic(mode)
        I=punc.getI()
        # viterbi
        vit = dabp.vitdec(I)
        # descrambler
        scram = dabp.scrambler(I)
        # FIB sink
        self.dst = dabp.fib_sink()
        
        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(src, nulldet)
        self.connect(src, (demod,0))
        self.connect(nulldet, (demod,1))
        self.connect((demod,0), demux, punc, vit, scram, self.dst)
        self.connect((demod,1), nullsink)
Esempio n. 2
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 def __init__(self, mode, freq, gain, conf, subchid, record=None, usrp=True):
     gr.top_block.__init__(self)
     
     if usrp: # set up usrp source
         src = dabp_usrp.setup_usrp(freq, gain)
     else: # set up sample file source
         sinput = gr.file_source(gr.sizeof_short, samp.encode('ascii'), False)
         src = gr.interleaved_short_to_complex()
         self.connect(sinput, src)
         
     # channel configuration
     cc = dabp.channel_conf(conf)
     #sys.stderr.write("Playing Channel: "+cc.get_label(options.subchid)+"\n")
     
     start_addr = cc.get_start_addr(subchid)
     subchsz = cc.get_subchsz(subchid)
     optprot = cc.get_optprot(subchid)
     #print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)
     
     param = dabp.parameters(mode)
     
     # null symbol detector
     samples_per_null_sym=param.get_Nnull()
     #print "samples per null symbol : %d" % samples_per_null_sym
     nulldet = dabp.detect_null(samples_per_null_sym)
     # ofdm demod
     demod = dabp.ofdm_demod(mode)
     # FIC/MSC demultiplexer
     demux = dabp.fic_msc_demux(1, mode)
     
     cifsz = param.get_cifsz()
     scs = dabp.subchannel_selector(cifsz,start_addr,subchsz)
     intlv = dabp.time_deinterleaver(subchsz)
     punc = dabp.depuncturer(subchsz,optprot)
     I = punc.getI()
     vit = dabp.vitdec(I)
     scram = dabp.scrambler(I)
     len_logfrm=scram.get_nbytes()
     sync = dabp.super_frame_sync(len_logfrm)
     subchidx = sync.get_subchidx()
     rs = dabp.super_frame_rsdec(subchidx)
     if record == None:
         mplayer = subprocess.Popen(['mplayer', '-af', 'volume=20', '-ac', '+faad', '-rawaudio', 'format=0xff', '-demuxer', '+rawaudio','-'], stdin=subprocess.PIPE)
         dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
     else:
         dst = dabp.super_frame_sink(subchidx, record.encode('ascii'))
     
     nullsink = gr.null_sink(gr.sizeof_char)
     # connect everything
     self.connect(src, nulldet)
     self.connect(src, (demod,0))
     self.connect(nulldet, (demod,1))
     self.connect((demod,0), demux, scs, intlv, punc, vit, scram, sync, rs, dst)
     self.connect((demod,1), nullsink)
Esempio n. 3
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 def __init__(self, mode, freq, gain, conf, samp=None, usrp=True):
     gr.top_block.__init__(self)
     
     if usrp: # set up usrp source
         src = dabp_usrp.setup_usrp(freq, gain)
     else: # set up sample file source
         sinput = gr.file_source(gr.sizeof_short, samp.encode('ascii'), False)
         src = gr.interleaved_short_to_complex()
         self.connect(sinput, src)
         
     param = dabp.parameters(mode)
     # null symbol detector
     samples_per_null_sym=param.get_Nnull()
     #print "samples per null symbol : %d" % samples_per_null_sym
     nulldet = dabp.detect_null(samples_per_null_sym)
     # ofdm demod
     demod = dabp.ofdm_demod(mode)
     # FIC/MSC demultiplexer
     demux = dabp.fic_msc_demux(0, mode)
     # depuncturer
     punc = dabp.depuncturer_fic(mode)
     I=punc.getI()
     # viterbi
     vit = dabp.vitdec(I)
     # descrambler
     scram = dabp.scrambler(I)
     # FIB sink
     self.dst = dabp.fib_sink()
     
     nullsink = gr.null_sink(gr.sizeof_char)
     # connect everything
     self.connect(src, nulldet)
     self.connect(src, (demod,0))
     self.connect(nulldet, (demod,1))
     self.connect((demod,0), demux, punc, vit, scram, self.dst)
     self.connect((demod,1), nullsink)
     
Esempio n. 4
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    def __init__(self, mode, freq, gain, conf, samp=None, usrp=True):
        gr.top_block.__init__(self)

        if usrp:  # set up usrp source
            src = dabp_usrp.setup_usrp(freq, gain)
        else:  # set up sample file source
            sinput = gr.file_source(gr.sizeof_short, samp.encode('ascii'),
                                    False)
            src = gr.interleaved_short_to_complex()
            self.connect(sinput, src)

        param = dabp.parameters(mode)
        # null symbol detector
        samples_per_null_sym = param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(0, mode)
        # depuncturer
        punc = dabp.depuncturer_fic(mode)
        I = punc.getI()
        # viterbi
        vit = dabp.vitdec(I)
        # descrambler
        scram = dabp.scrambler(I)
        # FIB sink
        self.dst = dabp.fib_sink()

        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(src, nulldet)
        self.connect(src, (demod, 0))
        self.connect(nulldet, (demod, 1))
        self.connect((demod, 0), demux, punc, vit, scram, self.dst)
        self.connect((demod, 1), nullsink)
Esempio n. 5
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    def __init__(self):
        gr.top_block.__init__(self)

        usage = "%prog: [options] samples_file"
        parser = OptionParser(option_class=eng_option, usage=usage)
        parser.add_option("-m",
                          "--dab-mode",
                          type="int",
                          default=1,
                          help="DAB mode [default=%default]")
        parser.add_option(
            "-c",
            "--complex",
            action="store_true",
            default=False,
            help=
            "Sample file is float complex (64 bit per sample, 32 I + 32 Q) format"
        )
        parser.add_option(
            "-n",
            "--config",
            type="string",
            default="channel.conf",
            help="DAB+ channel configuration file [default=%default]")

        (options, args) = parser.parse_args()

        if len(args) < 1:
            print "error: need file with samples"
            sys.exit(1)
        else:
            filename = args[0]
            if options.complex:
                src = gr.file_source(gr.sizeof_gr_complex, filename, True)
            else:
                sinput = gr.file_source(gr.sizeof_short, filename, True)
                src = gr.interleaved_short_to_complex()
                self.connect(sinput, src)

        self.conf = options.config

        mode = options.dab_mode
        param = dabp.parameters(mode)
        # null symbol detector
        samples_per_null_sym = param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(0, mode)
        # depuncturer
        punc = dabp.depuncturer_fic(mode)
        I = punc.getI()
        # viterbi
        vit = dabp.vitdec(I)
        # descrambler
        scram = dabp.scrambler(I)
        # FIB sink
        self.dst = dabp.fib_sink()

        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(src, nulldet)
        self.connect(src, (demod, 0))
        self.connect(nulldet, (demod, 1))
        self.connect((demod, 0), demux, punc, vit, scram, self.dst)
        self.connect((demod, 1), nullsink)
Esempio n. 6
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    def __init__(self):
        gr.top_block.__init__(self)

        parser = OptionParser(option_class=eng_option)
        parser.add_option("-m", "--dab-mode", type="int", default=1,
            help="DAB mode [default=%default]")
        parser.add_option("-f", "--freq", type="eng_float", default=206352000,
            help="Carrier frequency [default=%default]")
        parser.add_option("-g", "--gain", type="eng_float", default=8,
            help="USRP gain (dB) [default=%default]")
        parser.add_option("-i", "--subchid", type="int", default=-1,
            help="Subchannel ID")
        parser.add_option("-n", "--config", type="string", default="channel3.conf",
            help="DAB+ channel configuration file [default=%default]")
        parser.add_option("-o", "--output", type="string", default="-",
            help="Output AAC file [default=%default]")
        parser.add_option("-p", "--mplayer", action="store_true", default=False,
            help="Play the program by MPlayer [default=%default, stdout]")
        (options, args) = parser.parse_args ()
        
        if len(args)>0:
            parser.print_help()
            raise SystemExit, 1
        
        ######## set up usrp
        self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
        rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
        #print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
        #print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
        #print "rx_subdev_spec = ", options.rx_subdev_spec
        
        mux=usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
        #print "mux = ", mux
        self.u.set_mux(mux)

        # determine the daughterboard subdevice we're using
        self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
        #print "Using RX d'board %s" % (self.subdev.side_and_name(),)
        input_rate = self.u.adc_freq() / self.u.decim_rate()
        #print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
        #print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))

        self.subdev.set_gain(options.gain)
        r = self.u.tune(0, self.subdev, options.freq)
        
        #print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
        if not r:
            sys.stderr.write('Failed to set frequency\n')
            raise SystemExit, 1
        
        
        # channel configuration
        cc = dabp.channel_conf(options.config)
        sys.stderr.write("Playing Channel: "+cc.get_label(options.subchid)+"\n")
        
        start_addr = cc.get_start_addr(options.subchid)
        subchsz = cc.get_subchsz(options.subchid)
        optprot = cc.get_optprot(options.subchid)
        #print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)
        
        mode=options.dab_mode
        param = dabp.parameters(mode)
        
        # null symbol detector
        samples_per_null_sym=param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(1, mode)
        
        cifsz = param.get_cifsz()
        scs = dabp.subchannel_selector(cifsz,start_addr,subchsz)
        intlv = dabp.time_deinterleaver(subchsz)
        punc = dabp.depuncturer(subchsz,optprot)
        I = punc.getI()
        vit = dabp.vitdec(I)
        scram = dabp.scrambler(I)
        len_logfrm=scram.get_nbytes()
        sync = dabp.super_frame_sync(len_logfrm)
        subchidx = sync.get_subchidx()
        rs = dabp.super_frame_rsdec(subchidx)
        if options.mplayer:
            mplayer = subprocess.Popen(['mplayer', '-ac', 'faad', '-rawaudio', 'format=0xff', '-demuxer', 'rawaudio','-'], stdin=subprocess.PIPE)
            dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
        else:
            dst = dabp.super_frame_sink(subchidx, options.output)
        
        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(self.u, nulldet)
        self.connect(self.u, (demod,0))
        self.connect(nulldet, (demod,1))
        self.connect((demod,0), demux, scs, intlv, punc, vit, scram, sync, rs, dst)
        self.connect((demod,1), nullsink)
Esempio n. 7
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    def __init__(self):
        gr.top_block.__init__(self)

        parser = OptionParser(option_class=eng_option)
        parser.add_option("-m",
                          "--dab-mode",
                          type="int",
                          default=1,
                          help="DAB mode [default=%default]")
        parser.add_option("-f",
                          "--freq",
                          type="eng_float",
                          default=206352000,
                          help="Carrier frequency [default=%default]")
        parser.add_option("-g",
                          "--gain",
                          type="eng_float",
                          default=8,
                          help="USRP gain (dB) [default=%default]")
        parser.add_option("-i",
                          "--subchid",
                          type="int",
                          default=-1,
                          help="Subchannel ID")
        parser.add_option(
            "-n",
            "--config",
            type="string",
            default="channel3.conf",
            help="DAB+ channel configuration file [default=%default]")
        parser.add_option("-o",
                          "--output",
                          type="string",
                          default="-",
                          help="Output AAC file [default=%default]")
        parser.add_option(
            "-p",
            "--mplayer",
            action="store_true",
            default=False,
            help="Play the program by MPlayer [default=%default, stdout]")
        (options, args) = parser.parse_args()

        if len(args) > 0:
            parser.print_help()
            raise SystemExit, 1

        ######## set up usrp
        self.u = usrp.source_c(decim_rate=32)  # 2M sampling freq
        rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
        #print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
        #print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
        #print "rx_subdev_spec = ", options.rx_subdev_spec

        mux = usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
        #print "mux = ", mux
        self.u.set_mux(mux)

        # determine the daughterboard subdevice we're using
        self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
        #print "Using RX d'board %s" % (self.subdev.side_and_name(),)
        input_rate = self.u.adc_freq() / self.u.decim_rate()
        #print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
        #print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))

        self.subdev.set_gain(options.gain)
        r = self.u.tune(0, self.subdev, options.freq)

        #print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
        if not r:
            sys.stderr.write('Failed to set frequency\n')
            raise SystemExit, 1

        # channel configuration
        cc = dabp.channel_conf(options.config)
        sys.stderr.write("Playing Channel: " + cc.get_label(options.subchid) +
                         "\n")

        start_addr = cc.get_start_addr(options.subchid)
        subchsz = cc.get_subchsz(options.subchid)
        optprot = cc.get_optprot(options.subchid)
        #print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)

        mode = options.dab_mode
        param = dabp.parameters(mode)

        # null symbol detector
        samples_per_null_sym = param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(1, mode)

        cifsz = param.get_cifsz()
        scs = dabp.subchannel_selector(cifsz, start_addr, subchsz)
        intlv = dabp.time_deinterleaver(subchsz)
        punc = dabp.depuncturer(subchsz, optprot)
        I = punc.getI()
        vit = dabp.vitdec(I)
        scram = dabp.scrambler(I)
        len_logfrm = scram.get_nbytes()
        sync = dabp.super_frame_sync(len_logfrm)
        subchidx = sync.get_subchidx()
        rs = dabp.super_frame_rsdec(subchidx)
        if options.mplayer:
            mplayer = subprocess.Popen([
                'mplayer', '-ac', 'faad', '-rawaudio', 'format=0xff',
                '-demuxer', 'rawaudio', '-'
            ],
                                       stdin=subprocess.PIPE)
            dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
        else:
            dst = dabp.super_frame_sink(subchidx, options.output)

        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(self.u, nulldet)
        self.connect(self.u, (demod, 0))
        self.connect(nulldet, (demod, 1))
        self.connect((demod, 0), demux, scs, intlv, punc, vit, scram, sync, rs,
                     dst)
        self.connect((demod, 1), nullsink)
Esempio n. 8
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    def __init__(self):
        gr.top_block.__init__(self)

        usage = "%prog: [options] samples_file"
        parser = OptionParser(option_class=eng_option, usage=usage)
        parser.add_option("-m", "--dab-mode", type="int", default=1,
            help="DAB mode [default=%default]")
        parser.add_option("-c", "--complex", action="store_true", default=False,
            help="Sample file is float complex (64 bit per sample, 32 I + 32 Q) format")
        parser.add_option("-i", "--subchid", type="int", default=-1,
            help="Subchannel ID")
        parser.add_option("-n", "--config", type="string", default="channel2.conf",
            help="DAB+ channel configuration file [default=%default]")
        parser.add_option("-p", "--mplayer", action="store_true", default=False,
            help="Play the program by MPlayer [default=%default, stdout]")
        (options, args) = parser.parse_args ()
        
        if len(args)<1:
            parser.print_help()
            raise SystemExit, 1
        else:
            filename = args[0]
            if options.complex:
                src = gr.file_source(gr.sizeof_gr_complex, filename, False)
            else:
                sinput = gr.file_source(gr.sizeof_short, filename, False)
                src = gr.interleaved_short_to_complex()
                self.connect(sinput, src)
        
        # channel configuration
        cc = dabp.channel_conf(options.config)
        sys.stderr.write("Playing Channel: "+cc.get_label(options.subchid)+"\n")
        
        start_addr = cc.get_start_addr(options.subchid)
        subchsz = cc.get_subchsz(options.subchid)
        optprot = cc.get_optprot(options.subchid)
        # print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)
        
        mode=options.dab_mode
        param = dabp.parameters(mode)
        
        # null symbol detector
        samples_per_null_sym=param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(1, mode)
        
        cifsz = param.get_cifsz()
        scs = dabp.subchannel_selector(cifsz,start_addr,subchsz)
        intlv = dabp.time_deinterleaver(subchsz)
        punc = dabp.depuncturer(subchsz,optprot)
        I = punc.getI()
        vit = dabp.vitdec(I)
        scram = dabp.scrambler(I)
        len_logfrm=scram.get_nbytes()
        sync = dabp.super_frame_sync(len_logfrm)
        subchidx = sync.get_subchidx()
        rs = dabp.super_frame_rsdec(subchidx)
        if options.mplayer:
            mplayer = subprocess.Popen(['mplayer', '-ac', 'faad', '-rawaudio', 'format=0xff', '-demuxer', 'rawaudio','-'], stdin=subprocess.PIPE)
            dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
        else:
            dst = dabp.super_frame_sink(subchidx, "-")
        
        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(src, nulldet)
        self.connect(src, (demod,0))
        self.connect(nulldet, (demod,1))
        self.connect((demod,0), demux, scs)
        self.connect((scs,0), (intlv,0), (punc,0), (vit,0), (scram,0), (sync,0), (rs,0), (dst,0))
        self.connect((demod,1), nullsink)
        self.connect((scs,1), (intlv,1), (punc,1), (vit,1), (scram,1), (sync,1), (rs,1), (dst,1))
        
        # debug
        #self.connect(nulldet, gr.file_sink(gr.sizeof_char, "debug_nulldet.dat"))
        #self.connect((scs,0), gr.file_sink(gr.sizeof_float, "debug_scs.dat"))
        #self.connect((intlv,0), gr.file_sink(gr.sizeof_float, "debug_int.dat"))
        #self.connect((punc,0), gr.file_sink(gr.sizeof_float, "debug_punc.dat"))
        #self.connect((vit,0), gr.file_sink(gr.sizeof_char, "debug_vit.dat"))
        #self.connect((scram,0), gr.file_sink(gr.sizeof_char, "debug_scr.dat"))
        self.connect((sync,0), gr.file_sink(gr.sizeof_char, "debug_sync.dat"))
Esempio n. 9
0
    def __init__(self):
        gr.top_block.__init__(self)

        parser = OptionParser(option_class=eng_option)
        parser.add_option("-m", "--dab-mode", type="int", default=1,
            help="DAB mode [default=%default]")
        parser.add_option("-f", "--freq", type="eng_float", default=206352000,
            help="Carrier frequency [default=%default]")
        parser.add_option("-g", "--gain", type="eng_float", default=8,
            help="USRP gain (dB) [default=%default]")
        parser.add_option("-n", "--config", type="string", default="channel.conf",
            help="DAB+ channel configuration file [default=%default]")
        
        (options, args) = parser.parse_args ()
        
        if len(args)>0:
            parser.print_help()
            raise SystemExit, 1
        
        self.conf=options.config
        
        ######## set up usrp
        self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
        rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
        #print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
        #print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
        #print "rx_subdev_spec = ", options.rx_subdev_spec
        
        mux=usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
        #print "mux = ", mux
        self.u.set_mux(mux)

        # determine the daughterboard subdevice we're using
        self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
        #print "Using RX d'board %s" % (self.subdev.side_and_name(),)
        input_rate = self.u.adc_freq() / self.u.decim_rate()
        #print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
        #print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))

        self.subdev.set_gain(options.gain)
        r = self.u.tune(0, self.subdev, options.freq)
        
        #print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
        if not r:
            sys.stderr.write('Failed to set frequency\n')
            raise SystemExit, 1
        
        
        mode=options.dab_mode
        param = dabp.parameters(mode)
        # null symbol detector
        samples_per_null_sym=param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(0, mode)
        # depuncturer
        punc = dabp.depuncturer_fic(mode)
        I=punc.getI()
        # viterbi
        vit = dabp.vitdec(I)
        # descrambler
        scram = dabp.scrambler(I)
        # FIB sink
        self.dst = dabp.fib_sink()
        
        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(self.u, nulldet)
        self.connect(self.u, (demod,0))
        self.connect(nulldet, (demod,1))
        self.connect((demod,0), demux, punc, vit, scram, self.dst)
        self.connect((demod,1), nullsink)
Esempio n. 10
0
    def __init__(self):
        gr.top_block.__init__(self)

        parser = OptionParser(option_class=eng_option)
        parser.add_option("-m",
                          "--dab-mode",
                          type="int",
                          default=1,
                          help="DAB mode [default=%default]")
        parser.add_option("-f",
                          "--freq",
                          type="eng_float",
                          default=206352000,
                          help="Carrier frequency [default=%default]")
        parser.add_option("-g",
                          "--gain",
                          type="eng_float",
                          default=8,
                          help="USRP gain (dB) [default=%default]")
        parser.add_option(
            "-n",
            "--config",
            type="string",
            default="channel.conf",
            help="DAB+ channel configuration file [default=%default]")

        (options, args) = parser.parse_args()

        if len(args) > 0:
            parser.print_help()
            raise SystemExit, 1

        self.conf = options.config

        ######## set up usrp
        self.u = usrp.source_c(decim_rate=32)  # 2M sampling freq
        rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
        #print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
        #print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
        #print "rx_subdev_spec = ", options.rx_subdev_spec

        mux = usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
        #print "mux = ", mux
        self.u.set_mux(mux)

        # determine the daughterboard subdevice we're using
        self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
        #print "Using RX d'board %s" % (self.subdev.side_and_name(),)
        input_rate = self.u.adc_freq() / self.u.decim_rate()
        #print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
        #print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))

        self.subdev.set_gain(options.gain)
        r = self.u.tune(0, self.subdev, options.freq)

        #print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
        if not r:
            sys.stderr.write('Failed to set frequency\n')
            raise SystemExit, 1

        mode = options.dab_mode
        param = dabp.parameters(mode)
        # null symbol detector
        samples_per_null_sym = param.get_Nnull()
        #print "samples per null symbol : %d" % samples_per_null_sym
        nulldet = dabp.detect_null(samples_per_null_sym)
        # ofdm demod
        demod = dabp.ofdm_demod(mode)
        # FIC/MSC demultiplexer
        demux = dabp.fic_msc_demux(0, mode)
        # depuncturer
        punc = dabp.depuncturer_fic(mode)
        I = punc.getI()
        # viterbi
        vit = dabp.vitdec(I)
        # descrambler
        scram = dabp.scrambler(I)
        # FIB sink
        self.dst = dabp.fib_sink()

        nullsink = gr.null_sink(gr.sizeof_char)
        # connect everything
        self.connect(self.u, nulldet)
        self.connect(self.u, (demod, 0))
        self.connect(nulldet, (demod, 1))
        self.connect((demod, 0), demux, punc, vit, scram, self.dst)
        self.connect((demod, 1), nullsink)