#!/usr/bin/env python
#
# Copyright 2007 Free Software Foundation, Inc.
# 
# This file is part of GNU Radio
# 
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
# 
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
# 

from gnuradio import gr, usrp, eng_notation
import math

n2s = eng_notation.num_to_str

class sounder_tx(gr.hier_block2):
    """
    Creates a channel sounder generator with the given parameters.
    """

    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(1, 1, gr.sizeof_float)) # Output signature

        self._degree = degree
        self._chip_rate = chip_rate
        self._verbose = verbose
        self._length = 2**degree-1
        
        # Connect PN source to block output
        self.connect(gr.glfsr_source_f(degree), self)