def test_add_carrier_offset(self, dtype):
s = signals.ResampledQAM(16, 2**14, fs=2, nmodes=2, dtype=dtype)
s2 = impairments.add_carrier_offset(s, 1e-3)
assert np.dtype(dtype) is s2.dtype
def test_add_carrier_offset(self):
s2 = impairments.add_carrier_offset(self.s, 1e-3)
assert type(self.s) is type(s2)
"sig_agwn_pmd_time")
if USE_PHASE_NOISE:
sig = impairments.apply_phase_noise(sig, LINEWIDTH)
if PLOT_PICTURES:
plot_constellation(
sig,
"Signal constellation after pulseshaping, AGWN\n PMD and phase noise, linewidth of laser = {:d}MHz"
.format(int(LINEWIDTH / 1e6)), "sig_agwn_pmd_phase")
plot_time(
sig,
"Signal constellation after pulseshaping, AGWN\n PMD and phase noise, linewidth of laser = {:d}MHz"
.format(int(LINEWIDTH / 1e6)), "sig_agwn_pmd_phase_time")
if USE_FREQ_OFFSET:
sig = impairments.add_carrier_offset(sig, FREQ_OFFSET)
if PLOT_PICTURES:
plot_constellation(
sig,
"Signal constellation at receiver, with AGWN, PMD,\n phase noise and frequency offset, $f_{offset}="
+ "{:d}MHz$".format(int(FREQ_OFFSET / 1e6)),
"sig_agwn_pmd_phase_freq")
plot_time(
sig,
"Signal constellation at receiver, with AGWN, PMD,\n phase noise and frequency offset, $f_{offset}="
+ "{:d}MHz$".format(int(FREQ_OFFSET / 1e6)),
"sig_agwn_pmd_phase_freq_time")
# lock the random seed to add traceability
random.seed(420691337)