def __init__(self, u, center_freq, hw_dec_rate, downsample_rate, pulse_width, tari, debug_on, output_data):
gr.top_block.__init__(self)
# sample_rate = 100e6 / hw_dec_rate
sample_rate = 2e6
self.u = u
# self.u.set_decim(hw_dec_rate)
g = u.get_gain_range()
print "-----------"
self.u.set_gain(float(g.start() + g.stop()) / 4)
print "Using gain of", float(g.start() + g.stop()) / 4 , "(", g.stop(), "-", g.start(), ")"
tune_req = uhd.tune_request_t(center_freq,sample_rate)
# r = rx.set_center_freq(tune_req)
x = self.u.set_center_freq(tune_req)
if not x:
print "Couldn't set rx freq"
self.u.set_samp_rate(sample_rate)
us_per_sample = 1e6 / sample_rate * downsample_rate
print "USRP Sample Rate: "+ str(sample_rate) + " us Per Sample: " + str(us_per_sample)
# 25 Msps is too much to process. But we don't want to decimate at the USRP because we want the full band.
# We can downsample, because we don't care about aliasing.
self.downsample = gr.keep_one_in_n(gr.sizeof_gr_complex, int(downsample_rate))
self.to_mag = gr.complex_to_mag()
# For TARI = 24, PW == DELIM. So we can't do a matched filter, or everything becomes a delimiter and a zero.
# PW / 2 smooths reasonably well.
# self.smooth = gr.moving_average_ff(int(pulse_width / us_per_sample) /2 , int(pulse_width / us_per_sample) /2 )
self.smooth = gr.moving_average_ff(int(1), 1.0)
self.rd = rfid.reader_decoder(us_per_sample, tari)
if(debug_on):
# fileInfo = "_smooth1_b"
# time = strftime("%H_%M_%S", localtime())
# threshFileName = "rm_thresh_" + time + fileInfo + ".out"
# signalFileName = "rm_signal_" + time + fileInfo + ".out"
signalFileName = "rm_signal.out"
threshFileName = "rm_thresh.out"
self.sink = gr.file_sink(gr.sizeof_float, threshFileName)
# self.signal_sink = gr.file_sink(gr.sizeof_float, signalFileName)
# self.connect(self.smooth, self.signal_sink)
else:
self.sink = gr.null_sink(gr.sizeof_float)
self.connect(self.u, self.downsample, self.to_mag, self.smooth, self.rd, self.sink)
# Change to "gr.sizeof_gr_complex" if "block_x" is "rx"
file_rx_sink = gr.file_sink(gr.sizeof_gr_complex, output_data)
self.connect(self.u, file_rx_sink)
def __init__(self, u, center_freq, hw_dec_rate, downsample_rate,
pulse_width, tari, debug_on):
gr.top_block.__init__(self)
self.u = u
self.u.set_decim(hw_dec_rate)
g = u.gain_range()
self.u.set_gain(float(g[0] + g[1]) / 4)
print "Using gain of", float(g[0] +
g[1]) / 4, "(", g[0], "-", g[1], ")"
x = self.u.set_center_freq(center_freq)
if not x:
print "Couldn't set rx freq"
sample_rate = self.u.adc_rate() / hw_dec_rate
us_per_sample = 1e6 / sample_rate * downsample_rate
print "USRP Sample Rate: " + str(
sample_rate) + " us Per Sample: " + str(us_per_sample)
#25 Msps is too much to process. But we don't want to decimate at the USRP because we want the full band.
# We can downsample, because we don't care about aliasing.
self.downsample = gr.keep_one_in_n(gr.sizeof_gr_complex,
int(downsample_rate))
self.to_mag = gr.complex_to_mag()
#For TARI = 24, PW == DELIM. So we can't do a matched filter, or everything becomes a delimiter and a zero.
# PW / 2 smooths reasonably well.
self.smooth = gr.moving_average_ff(
int(pulse_width / us_per_sample) / 2,
int(pulse_width / us_per_sample) / 2)
self.rd = rfid.reader_decoder(us_per_sample, tari)
if (debug_on):
self.sink = gr.file_sink(gr.sizeof_float, "rm_thresh.out")
self.signal_sink = gr.file_sink(gr.sizeof_float, "rm_signal.out")
self.connect(self.smooth, self.signal_sink)
else:
self.sink = gr.null_sink(gr.sizeof_float)
self.connect(self.u, self.downsample, self.to_mag, self.smooth,
self.rd, self.sink)
def __init__(self, u, center_freq, hw_dec_rate, downsample_rate, pulse_width, tari, debug_on):
gr.top_block.__init__(self)
self.u = u
self.u.set_decim(hw_dec_rate)
g = u.gain_range()
self.u.set_gain(float(g[0] + g[1]) / 4)
print "Using gain of", float(g[0] + g[1]) / 4 , "(", g[0], "-", g[1], ")"
x = self.u.set_center_freq(center_freq)
if not x:
print "Couldn't set rx freq"
sample_rate = self.u.adc_rate() / hw_dec_rate
us_per_sample = 1e6 / sample_rate * downsample_rate
print "USRP Sample Rate: "+ str(sample_rate) + " us Per Sample: " + str(us_per_sample)
#25 Msps is too much to process. But we don't want to decimate at the USRP because we want the full band.
# We can downsample, because we don't care about aliasing.
self.downsample = gr.keep_one_in_n(gr.sizeof_gr_complex, int(downsample_rate))
self.to_mag = gr.complex_to_mag()
#For TARI = 24, PW == DELIM. So we can't do a matched filter, or everything becomes a delimiter and a zero.
# PW / 2 smooths reasonably well.
self.smooth = gr.moving_average_ff(int(pulse_width / us_per_sample) /2 , int(pulse_width / us_per_sample) /2 )
self.rd = rfid.reader_decoder(us_per_sample, tari)
if(debug_on):
self.sink = gr.file_sink(gr.sizeof_float, "rm_thresh.out")
self.signal_sink = gr.file_sink(gr.sizeof_float, "rm_signal.out")
self.connect(self.smooth, self.signal_sink)
else:
self.sink = gr.null_sink(gr.sizeof_float)
self.connect(self.u, self.downsample, self.to_mag, self.smooth, self.rd, self.sink)
