def test_002_per_subcarrier(self):
# set up fg
n_frames = self.n_frames
active_subcarriers = 110
subcarriers = 128
timeslots = 205
smap = np.arange(active_subcarriers) + (subcarriers -
active_subcarriers) // 2
data = get_random_qpsk(active_subcarriers * timeslots)
ref = map_to_waveform_resources(data, active_subcarriers, subcarriers,
smap, False)
for i in range(n_frames - 1):
d = get_random_qpsk(active_subcarriers * timeslots)
data = np.concatenate((data, d))
ref = np.concatenate(
(ref,
map_to_waveform_resources(d, active_subcarriers, subcarriers,
smap, False)))
src = blocks.vector_source_c(data)
mapper = gfdm.resource_mapper_cc(timeslots, subcarriers,
active_subcarriers, smap, False)
snk = blocks.vector_sink_c()
self.tb.connect(src, mapper, snk)
self.tb.run()
# check data
res = snk.data()
self.assertComplexTuplesAlmostEqual(ref, res)
def test_001_t(self):
np.set_printoptions(precision=2)
n_frames = 3
alpha = .5
active = 8
M = 8
K = 16
L = 2
cp_len = 8
cs_len = 4
ramp_len = 4
block_len = M * K
window_len = get_window_len(cp_len, M, K, cs_len)
taps = get_frequency_domain_filter('rrc', alpha, M, K, L)
taps /= np.sqrt(calculate_signal_energy(taps) / M)
window_taps = get_raised_cosine_ramp(ramp_len, window_len)
pn_symbols = get_random_qpsk(K)
H_preamble = get_frequency_domain_filter('rrc', alpha, 2, K, L)
preamble = get_sync_symbol(pn_symbols, H_preamble, K, L, cp_len,
ramp_len)[0]
smap = get_subcarrier_map(K, active, dc_free=True)
ref = np.array([], dtype=complex)
data = np.array([], dtype=complex)
frame_len = window_len + len(preamble)
frame_gap = np.zeros(frame_len)
for i in range(n_frames):
d = get_random_qpsk(active * M)
dd = map_to_waveform_resources(d, active, K, smap)
D = get_data_matrix(dd, K, group_by_subcarrier=False)
b = gfdm_modulate_block(D, taps, M, K, L, False)
b = add_cyclic_starfix(b, cp_len, cs_len)
b = pinch_block(b, window_taps)
ref = np.concatenate((ref, frame_gap, preamble, b))
data = np.concatenate((data, d))
src = blocks.vector_source_c(data)
mapper = gfdm.resource_mapper_cc(active, K, M, smap, True)
mod = gfdm.simple_modulator_cc(M, K, L, taps)
prefixer = gfdm.cyclic_prefixer_cc(block_len, cp_len, cs_len, ramp_len,
window_taps)
preambler = blocks.vector_insert_c(preamble,
window_len + len(preamble), 0)
gapper = blocks.vector_insert_c(frame_gap, frame_len + len(frame_gap),
0)
dst = blocks.vector_sink_c()
self.tb.connect(src, mapper, mod, prefixer, preambler, gapper, dst)
# self.tb.connect(src, mapper, dst)
self.tb.run()
res = np.array(dst.data())[0:len(ref)]
self.assertComplexTuplesAlmostEqual(ref, res, 5)
def test_004_active_subcarriers(self):
n_frames = 1
timeslots = 9
subcarriers = 32
active_subcarriers = 20
overlap = 2
ic_iterations = 64
f_taps = filters.get_frequency_domain_filter("rrc", 0.5, timeslots,
subcarriers, overlap)
gfdm_constellation = digital.constellation_qpsk().base()
print(gfdm_constellation.points())
subcarrier_map = get_subcarrier_map(subcarriers, active_subcarriers)
data = get_random_qpsk(n_frames * timeslots * active_subcarriers)
data *= 2.0
src = blocks.vector_source_c(data)
mapper = gfdm.resource_mapper_cc(timeslots, subcarriers,
active_subcarriers, subcarrier_map,
True)
mod = gfdm.simple_modulator_cc(timeslots, subcarriers, overlap, f_taps)
demod = gfdm.advanced_receiver_sb_cc(
timeslots,
subcarriers,
overlap,
ic_iterations,
f_taps,
gfdm_constellation,
subcarrier_map,
0,
)
demod.set_ic(64)
demapper = gfdm.resource_demapper_cc(timeslots, subcarriers,
active_subcarriers,
subcarrier_map, True)
snk = blocks.vector_sink_c()
self.tb.connect(src, mapper, mod, demod, demapper, snk)
self.tb.run()
res = np.array(snk.data())
print(data[0:10])
print(res[0:10])
self.assertComplexTuplesAlmostEqual(data, res, 1)
def test_002_subcarrier_first(self):
timeslots = 9
subcarriers = 32
active_subcarriers = 20
subcarrier_map = get_subcarrier_map(subcarriers, active_subcarriers)
data = get_random_qpsk(10 * timeslots * active_subcarriers)
src = blocks.vector_source_c(data)
mapper = gfdm.resource_mapper_cc(timeslots, subcarriers,
active_subcarriers, subcarrier_map,
False)
demapper = gfdm.resource_demapper_cc(timeslots, subcarriers,
active_subcarriers,
subcarrier_map, False)
snk = blocks.vector_sink_c()
self.tb.connect(src, mapper, demapper, snk)
self.tb.run()
# check data
res = np.array(snk.data())
self.assertComplexTuplesAlmostEqual(data, res)