diff options
Diffstat (limited to 'gnuradio-examples/python/hier/sounder/sounder_tx.py')
| -rw-r--r-- | gnuradio-examples/python/hier/sounder/sounder_tx.py | 46 |
1 files changed, 11 insertions, 35 deletions
diff --git a/gnuradio-examples/python/hier/sounder/sounder_tx.py b/gnuradio-examples/python/hier/sounder/sounder_tx.py index e6a3e84f8..7d91f36e1 100644 --- a/gnuradio-examples/python/hier/sounder/sounder_tx.py +++ b/gnuradio-examples/python/hier/sounder/sounder_tx.py @@ -21,50 +21,26 @@ # from gnuradio import gr, usrp, eng_notation -from usrp_sink import usrp_sink_c import math n2s = eng_notation.num_to_str class sounder_tx(gr.hier_block2): """ - Creates a top-level channel sounder block with the given parameters. + Creates a channel sounder generator with the given parameters. """ - def __init__(self, subdev_spec, freq, cal, verbose, max_delay, chip_rate, amplitude): - - # Call hierarchical block constructor - # Top-level blocks have no inputs or outputs + def __init__(self, degree, chip_rate, verbose): gr.hier_block2.__init__(self, - "sounder_tx", # Block typename - gr.io_signature(0,0,0), # Input signature - gr.io_signature(0,0,0)) # Output signature - self._freq = freq - self._cal = cal - self._verbose = verbose - self._max_delay = max_delay - - self._u = usrp_sink_c(0, subdev_spec, chip_rate, self._freq, self._cal, verbose) - self._chip_rate = self._u._if_rate - self._resolution = 1.0/self._chip_rate + "sounder_tx", # Block typename + gr.io_signature(0,0,0), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature - min_chips = int(math.ceil(2.0*self._max_delay * self._chip_rate)) - degree = int(math.ceil(math.log(min_chips)/math.log(2))) + self._degree = degree + self._chip_rate = chip_rate + self._verbose = verbose self._length = 2**degree-1 - - self._glfsr = gr.glfsr_source_b(degree) - self._mapper = gr.chunks_to_symbols_bc((-amplitude+0j, amplitude+0j), 1) - if self._verbose: - print "Actual chip rate is", n2s(self._chip_rate), "chips/sec" - print "Resolution is", n2s(self._resolution), "sec" - print "Using specified maximum delay spread of", self._max_delay, "sec" - print "Mininum sequence length needed is", n2s(min_chips), "chips" - print "Using PN sequence of degree", degree, "length", self._length - print "Output amplitude is", amplitude - - self.define_component("glfsr", self._glfsr) - self.define_component("mapper", self._mapper) - self.define_component("usrp", self._u) - self.connect("glfsr", 0, "mapper", 0) - self.connect("mapper", 0, "usrp", 0) + # Connect PN source to block output + self.define_component("glfsr", gr.glfsr_source_f(degree)) + self.connect("glfsr", 0, "self", 0) |