def __init__(self, sps=8, bt=0.5, mod_idx=0.68):
gr.hier_block2.__init__(
self,
"simple_modulator",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
# message ports
self.message_port_register_hier_in("in")
self.message_port_register_hier_out("out")
# blocks
self.pack = pdu_utils.pack_unpack(pdu_utils.MODE_UNPACK_BYTE,
pdu_utils.BIT_ORDER_LSB_FIRST)
self.preamble = pdu_utils.pdu_preamble([], [], sps, 0)
modulation_index = mod_idx
sensitivity = (pi * modulation_index) / sps
gain = 1.0
taps = firdes.gaussian(gain, sps, bt, 5)
self.gmsk = pdu_utils.pdu_gmsk_fc(sensitivity, taps)
# connections
self.msg_connect(self, "in", self.pack, "pdu_in")
self.msg_connect(self.pack, "pdu_out", self.preamble, "pdu_in")
self.msg_connect(self.preamble, "pdu_out", self.gmsk, "pdu_in")
self.msg_connect(self.gmsk, "pdu_out", self, "out")
def test_006_basic_nrz(self):
self.dut = pdu_utils.pdu_preamble([], [], 1, 0, True)
self.connectUp()
input_data = pmt.init_u8vector(8, [1, 0, 1, 1, 0, 0, 1, 0])
input_dict = pmt.dict_add(pmt.make_dict(), pmt.intern("KEY"),
pmt.intern("VALUE"))
input_pdu = pmt.cons(input_dict, input_data)
expected_data = [1, -1, 1, 1, -1, -1, 1, -1]
expected_dict = pmt.dict_add(pmt.make_dict(), pmt.intern("KEY"),
pmt.intern("VALUE"))
expected_pdu = pmt.cons(
expected_dict, pmt.init_f32vector(len(expected_data),
expected_data))
self.tb.start()
time.sleep(.001)
self.emitter.emit(input_pdu)
time.sleep(.01)
self.tb.stop()
self.tb.wait()
self.assertEqual(1, self.debug.num_messages())
print("test_006_basic_nrz:")
print("pdu expected: " + repr(pmt.car(expected_pdu)))
print("pdu got: " + repr(pmt.car(self.debug.get_message(0))))
print("data expected: " + repr(pmt.to_python(pmt.cdr(expected_pdu))))
print("data got: " +
repr(pmt.to_python(pmt.cdr(self.debug.get_message(0)))))
print
self.assertTrue(pmt.equal(self.debug.get_message(0), expected_pdu))
def setUp (self):
self.tb = gr.top_block ()
self.emitter = pdu_utils.message_emitter()
self.emitter2 = pdu_utils.message_emitter()
self.pre = pdu_utils.pdu_preamble([], [], 8, 20, True)
self.gmsk = pdu_utils.pdu_gmsk_fc(0.5, firdes.gaussian(1,4,0.35,9))
self.debug = blocks.message_debug()
self.tb.msg_connect((self.emitter, 'msg'), (self.pre, 'pdu_in'))
self.tb.msg_connect((self.emitter2, 'msg'), (self.gmsk, 'pdu_in'))
self.tb.msg_connect((self.pre, 'pdu_out'), (self.gmsk, 'pdu_in'))
self.tb.msg_connect((self.gmsk, 'pdu_out'), (self.debug, 'store'))