forked from reynico/raspberry-noaa
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathrtlsdr_m2_lrpt_rx.py
executable file
·171 lines (136 loc) · 6.51 KB
/
rtlsdr_m2_lrpt_rx.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Meteor QPSK LRPT
# Author: otti
# Generated: Mon Apr 27 12:59:47 2020
##################################################
from datetime import datetime
from gnuradio import analog
from gnuradio import blocks
from gnuradio import digital
from gnuradio import eng_notation
from gnuradio import filter
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from optparse import OptionParser
import osmosdr
import time
import sys
class top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self, "Meteor QPSK LRPT")
##################################################
# Variables
##################################################
self.samp_rate_airspy = samp_rate_airspy = 1250000
self.decim = decim = 8
self.symb_rate = symb_rate = 72000
self.samp_rate = samp_rate = samp_rate_airspy/decim
self.sps = sps = (samp_rate*1.0)/(symb_rate*1.0)
self.pll_alpha = pll_alpha = 0.006
self.freq = freq = 137100000
self.clock_alpha = clock_alpha = 0.002
#self.bitstream_name = bitstream_name = "/home/pi/weather/meteor_LRPT_" + datetime.now().strftime("%d%m%Y_%H%M") + ".s"
self.bitstream_name = bitstream_name = sys.argv[4] + ".s"
##################################################
# Blocks
##################################################
self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
self.rtlsdr_source_0.set_sample_rate(samp_rate_airspy)
self.rtlsdr_source_0.set_center_freq(freq, 0)
self.rtlsdr_source_0.set_freq_corr(3, 0)
self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
self.rtlsdr_source_0.set_gain_mode(False, 0)
self.rtlsdr_source_0.set_gain(38.2, 0)
self.rtlsdr_source_0.set_if_gain(0, 0)
self.rtlsdr_source_0.set_bb_gain(0, 0)
self.rtlsdr_source_0.set_antenna('', 0)
self.rtlsdr_source_0.set_bandwidth(1500000, 0)
self.root_raised_cosine_filter_0 = filter.fir_filter_ccf(1, firdes.root_raised_cosine(
1, samp_rate, symb_rate, 0.6, 361))
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=1,
decimation=decim,
taps=None,
fractional_bw=None,
)
self.digital_costas_loop_cc_0 = digital.costas_loop_cc(pll_alpha, 4, False)
self.digital_constellation_soft_decoder_cf_1 = digital.constellation_soft_decoder_cf(digital.constellation_calcdist(([-1-1j, -1+1j, 1+1j, 1-1j]), ([0, 1, 3, 2]), 4, 1).base())
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_cc(sps, clock_alpha**2/4.0, 0.5, clock_alpha, 0.005)
self.blocks_float_to_char_0 = blocks.float_to_char(1, 127)
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_char*1, bitstream_name, False)
self.blocks_file_sink_0.set_unbuffered(False)
self.analog_rail_ff_0 = analog.rail_ff(-1, 1)
self.analog_agc_xx_0 = analog.agc_cc(1000e-4, 0.5, 1.0)
self.analog_agc_xx_0.set_max_gain(4000)
##################################################
# Connections
##################################################
self.connect((self.analog_agc_xx_0, 0), (self.root_raised_cosine_filter_0, 0))
self.connect((self.analog_rail_ff_0, 0), (self.blocks_float_to_char_0, 0))
self.connect((self.blocks_float_to_char_0, 0), (self.blocks_file_sink_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_constellation_soft_decoder_cf_1, 0))
self.connect((self.digital_constellation_soft_decoder_cf_1, 0), (self.analog_rail_ff_0, 0))
self.connect((self.digital_costas_loop_cc_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.analog_agc_xx_0, 0))
self.connect((self.root_raised_cosine_filter_0, 0), (self.digital_costas_loop_cc_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0, 0))
def get_samp_rate_airspy(self):
return self.samp_rate_airspy
def set_samp_rate_airspy(self, samp_rate_airspy):
self.samp_rate_airspy = samp_rate_airspy
self.set_samp_rate(self.samp_rate_airspy/self.decim)
self.rtlsdr_source_0.set_sample_rate(self.samp_rate_airspy)
def get_decim(self):
return self.decim
def set_decim(self, decim):
self.decim = decim
self.set_samp_rate(self.samp_rate_airspy/self.decim)
def get_symb_rate(self):
return self.symb_rate
def set_symb_rate(self, symb_rate):
self.symb_rate = symb_rate
self.set_sps((self.samp_rate*1.0)/(self.symb_rate*1.0))
self.root_raised_cosine_filter_0.set_taps(firdes.root_raised_cosine(1, self.samp_rate, self.symb_rate, 0.6, 361))
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.set_sps((self.samp_rate*1.0)/(self.symb_rate*1.0))
self.root_raised_cosine_filter_0.set_taps(firdes.root_raised_cosine(1, self.samp_rate, self.symb_rate, 0.6, 361))
def get_sps(self):
return self.sps
def set_sps(self, sps):
self.sps = sps
self.digital_clock_recovery_mm_xx_0.set_omega(self.sps)
def get_pll_alpha(self):
return self.pll_alpha
def set_pll_alpha(self, pll_alpha):
self.pll_alpha = pll_alpha
self.digital_costas_loop_cc_0.set_loop_bandwidth(self.pll_alpha)
def get_freq(self):
return self.freq
def set_freq(self, freq):
self.freq = freq
self.rtlsdr_source_0.set_center_freq(self.freq, 0)
def get_clock_alpha(self):
return self.clock_alpha
def set_clock_alpha(self, clock_alpha):
self.clock_alpha = clock_alpha
self.digital_clock_recovery_mm_xx_0.set_gain_omega(self.clock_alpha**2/4.0)
self.digital_clock_recovery_mm_xx_0.set_gain_mu(self.clock_alpha)
def get_bitstream_name(self):
return self.bitstream_name
def set_bitstream_name(self, bitstream_name):
self.bitstream_name = bitstream_name
self.blocks_file_sink_0.open(self.bitstream_name)
def main(top_block_cls=top_block, options=None):
tb = top_block_cls()
tb.start()
tb.wait()
if __name__ == '__main__':
main()