def __init__(self, gui, options):
gr.hier_block2.__init__(self, "bpsk_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = options.sps
self.amplitude = options.amplitude
self.verbose = options.verbose
self._excess_bw = _def_excess_bw
self._gray_code = _def_gray_code
if not isinstance(self._samples_per_symbol, int) or self._samples_per_symbol < 2:
raise TypeError, ("sample per symbol must be an integer >= 2, is %d" % self._samples_per_symbol)
arity = pow(2,self.bits_per_symbol())
# turn bytes into k-bit vectors
self.packed_to_unpacked_bb = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
if self._gray_code:
self.symbol_mapper = gr.map_bb(psk.binary_to_gray[arity])
else:
self.symbol_mapper = gr.map_bb(psk.binary_to_ungray[arity])
self.diff_encoder_bb = gr.diff_encoder_bb(arity)
#This bloc allow to decode the stream
#self.scrambler = gr.scrambler_bb(0x8A, 0x7F, 7)
#Transform symbols to chips
self.symbols_to_chips = ieee.symbols_to_chips_bs()
#self.chunks2symbols = gr.chunks_to_symbols_ic(psk.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_sc([-1+0j, 1+0j])
self.chunks2symbols_b = gr.chunks_to_symbols_bc([-1+0j, 1+0j])
# transform chips to symbols
print "bits_per_symbol", self.bits_per_symbol()
self.packed_to_unpacked_ss = \
gr.packed_to_unpacked_ss(self.bits_per_symbol(), gr.GR_MSB_FIRST)
ntaps = 11 * self._samples_per_symbol
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self._samples_per_symbol * self.amplitude, # gain (samples_per_symbol since we're
# interpolating by samples_per_symbol)
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol,
self.rrc_taps)
# Connect
#self.connect(self, self.bytes2chunks, self.symbol_mapper,self.scrambler, self.chunks2symbols, self.rrc_filter, self)
# self.wxgui_constellationsink2_0 = constsink_gl.const_sink_c(
# gui.GetWin(),
# title="Constellation Plot",
# sample_rate=self._samples_per_symbol,
# frame_rate=5,
# const_size=2048,
# M=2,
# theta=0,
# alpha=0.005,
# fmax=0.06,
# mu=0.5,
# gain_mu=0.005,
# symbol_rate=self._samples_per_symbol/2,
# omega_limit=0.005,
# )
# gui.Add(self.wxgui_constellationsink2_0.win)
#Modefied for IEEE 802.15.4
#self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.diff_encoder_bb, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self._scrambler, self.chunks2symbols_b, self.rrc_filter, self)
#self.connect(self.rrc_filter, self.wxgui_constellationsink2_0)
if self.verbose:
self._print_verbage()
def __init__(self, principal_gui, options):
gr.hier_block2.__init__(self, "bpsk_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = options.sps
self.amplitude = options.amplitude
self.verbose = options.verbose
self._excess_bw = _def_excess_bw
self._gray_code = _def_gray_code
if not isinstance(self._samples_per_symbol, int) or self._samples_per_symbol < 2:
raise TypeError, ("sample per symbol must be an integer >= 2, is %d" % self._samples_per_symbol)
arity = pow(2,self.bits_per_symbol())
#arity = pow (2, 2)
# turn bytes into k-bit vectors
self.packed_to_unpacked_bb = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
if self._gray_code:
map_param = psk.binary_to_gray[arity]
self.symbol_mapper = gr.map_bb(map_param)
else:
self.symbol_mapper = gr.map_bb(psk.binary_to_ungray[arity])
self.diff_encoder_bb = gr.diff_encoder_bb(arity)
#This bloc allow to decode the stream
#self.scrambler = gr.scrambler_bb(0x8A, 0x7F, 7)
#Transform symbols to chips
self.symbols_to_chips = ieee.symbols_to_chips_bs()
#self.chunks2symbols = gr.chunks_to_symbols_ic(psk.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_sc([-1+0j, 1+0j])
self.chunks2symbols_b = gr.chunks_to_symbols_bc([-1+0j, 1+0j])
# transform chips to symbols
print "bits_per_symbol", self.bits_per_symbol()
self.packed_to_unpacked_ss = \
gr.packed_to_unpacked_ss(self.bits_per_symbol(), gr.GR_MSB_FIRST)
ntaps = 11 * self._samples_per_symbol
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self._samples_per_symbol, # gain (samples_per_symbol since we're
# interpolating by samples_per_symbol)
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol,
self.rrc_taps)
# Connect
#self.connect(self, self.bytes2chunks, self.symbol_mapper,self.scrambler, self.chunks2symbols, self.rrc_filter, self)
#Modefied for IEEE 802.15.4
#self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.diff_encoder_bb, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#For IEEE 802.15.4 915 868 MHz standard
self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#case when we use a stream of bits
#self.connect(self, self.chunks2symbols_b, self.rrc_filter, self)
if self.verbose:
self._print_verbage()
