pmj.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#
# SPDX-License-Identifier: GPL-3.0
#
# GNU Radio Python Flow Graph
# Title: Power-modulated Jammer
# Author: Pietro Tedeschi
# E-mail: ptedeschi@hbku.edu.qa
# Description: Power-Modulated Jammer
# GNU Radio version: v3.8.2.0-73-g4a84443c
# All rights reserved.

from gnuradio import analog
from gnuradio import gr
from gnuradio.filter import firdes
import sys
import signal
from argparse import ArgumentParser
from gnuradio.eng_arg import eng_float, intx
from gnuradio import eng_notation
import osmosdr
import time

import random


class pmj(gr.top_block):

    def __init__(self):
        gr.top_block.__init__(self, "Power-modulated Jammer")

        ##################################################
        # Variables
        ##################################################
        self.samp_rate = samp_rate = 2e6
        self.f0 = f0 = 2437e6
        self.bw = bw = 5e6

        ##################################################
        # Blocks
        ##################################################
        self.osmosdr_sink_0 = osmosdr.sink(
            args="numchan=" + str(1) + " " + "hackrf=0"
        )
        self.osmosdr_sink_0.set_time_unknown_pps(osmosdr.time_spec_t())
        self.osmosdr_sink_0.set_sample_rate(samp_rate)
        self.osmosdr_sink_0.set_center_freq(f0, 0)
        self.osmosdr_sink_0.set_freq_corr(0, 0)
        self.osmosdr_sink_0.set_gain(14, 0)
        self.osmosdr_sink_0.set_if_gain(20, 0)
        self.osmosdr_sink_0.set_bb_gain(20, 0)
        self.osmosdr_sink_0.set_antenna('', 0)
        self.osmosdr_sink_0.set_bandwidth(bw, 0)
        self.analog_noise_source_x_0 = analog.noise_source_c(analog.GR_GAUSSIAN, 1, 0)


        ##################################################
        # Connections
        ##################################################
        self.connect((self.analog_noise_source_x_0, 0), (self.osmosdr_sink_0, 0))


    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate
        self.osmosdr_sink_0.set_sample_rate(self.samp_rate)

    def get_f0(self):
        return self.f0

    def set_f0(self, f0):
        self.f0 = f0
        self.osmosdr_sink_0.set_center_freq(self.f0, 0)

    def get_bw(self):
        return self.bw

    def set_bw(self, bw):
        self.bw = bw
        self.osmosdr_sink_0.set_bandwidth(self.bw, 0)

    def pulse(self):
        print('Press CTRL+C to stop the power-modulated jammer.')
        while True:
            time.sleep(1)
            self.osmosdr_sink_0.set_if_gain(random.randint(0,40), 0)



def main(top_block_cls=pmj, options=None):
    tb = top_block_cls()
    random.seed(0)

    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.pulse()
    try:
        input('Press Enter to quit: ')
    except EOFError:
        pass
    tb.stop()
    tb.wait()


if __name__ == '__main__':
    main()