112 lines
5.1 KiB
Python
112 lines
5.1 KiB
Python
#! /usr/bin/python
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import satnogs
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import satnogs_swig
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import math
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from gnuradio import blocks
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from gnuradio import filter
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from gnuradio import analog
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from gnuradio import gr
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from gnuradio.filter import firdes
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from gnuradio.gr.runtime_swig import sizeof_gr_complex
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class satnogs_upsat_transmitter(gr.hier_block2):
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def __init__(self,
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frame_preamble,
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sync_word,
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append_crc,
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whitening,
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manchester,
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msb_first,
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ax25_format,
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dest_addr,
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dest_ssid,
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src_addr,
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src_ssid,
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settling_samples,
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samps_per_symbol,
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interpolation_taps,
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samp_rate,
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lo_offset,
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deviation,
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baud_rate):
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gr.hier_block2.__init__(self, "satnogs_upsat_transmitter",
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gr.io_signature(0 , 0 , 0),
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# Output 0: The complex TX signal for the SDR device
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# Output 1: The constellation output for the vector analyzer
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gr.io_signature(1, 1, sizeof_gr_complex))
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self.frame_preamble = frame_preamble
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self.sync_word = sync_word
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self.append_crc = append_crc
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self.whitening = whitening
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self.manchester = manchester
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self.msb_first = msb_first
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self.ax25_format = ax25_format
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self.dest_addr = dest_addr
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self.dest_ssid = dest_ssid
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self.src_addr = src_addr
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self.src_ssid = src_ssid
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self.settling_samples = settling_samples
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self.samps_per_symbol = samps_per_symbol
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self.interpolation_taps = interpolation_taps
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self.samp_rate = samp_rate
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self.lo_offset = lo_offset
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self.deviation=deviation
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self.baud_rate=baud_rate
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self.message_port_register_hier_out("in")
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self.modulation_index = self.deviation/(self.baud_rate / 2.0)
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self.sensitivity = (math.pi*self.modulation_index) / self.samps_per_symbol
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self.resampling_rate = self.samp_rate / (self.baud_rate*self.samps_per_symbol )
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self.par_taps = filter.firdes.low_pass_2(32, 32, 0.8, 0.1, 60)
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self.num_filters = 32
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#=================================================================
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# TX Related blocks
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#=================================================================
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self.fsk_frame_encoder = satnogs_swig.upsat_fsk_frame_encoder(self.frame_preamble,
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self.sync_word,
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self.append_crc,
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self.whitening,
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self.manchester,
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self.msb_first,
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self.ax25_format,
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self.dest_addr,
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self.dest_ssid,
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self.src_addr,
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self.src_ssid,
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self.settling_samples
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)
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self.interp_fir_filter = filter.interp_fir_filter_fff(self.samps_per_symbol,
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self.interpolation_taps
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)
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self.frequency_modulator = analog.frequency_modulator_fc(self.sensitivity)
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self.signal_source = analog.sig_source_c(self.samp_rate,
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102,
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self.lo_offset,
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1,
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0)
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self.polyphase_arbitrary_resampler = filter.pfb_arb_resampler_ccf(self.resampling_rate,
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self.par_taps,
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self.num_filters)
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self.multiply = blocks.multiply_cc(1)
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#=================================================================
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# Connections
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#=================================================================
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self.msg_connect((self, "in"), (self.fsk_frame_encoder, "pdu"))
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self.connect((self.fsk_frame_encoder, 0), (self.interp_fir_filter, 0))
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self.connect((self.interp_fir_filter, 0), (self.frequency_modulator, 0))
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self.connect((self.frequency_modulator, 0), (self.polyphase_arbitrary_resampler, 0))
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self.connect((self.signal_source, 0) , (self.multiply, 0))
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self.connect((self.polyphase_arbitrary_resampler, 0) , (self.multiply, 1))
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self.connect((self.multiply, 0), self)
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