diff options
Diffstat (limited to 'gr-digital/python/digital/psk.py')
| -rw-r--r-- | gr-digital/python/digital/psk.py | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/gr-digital/python/digital/psk.py b/gr-digital/python/digital/psk.py index 0e0c65ea2b..5518ba55f3 100644 --- a/gr-digital/python/digital/psk.py +++ b/gr-digital/python/digital/psk.py @@ -1,36 +1,40 @@ # # Copyright 2005,2006,2011 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. -# +# """ PSK modulation and demodulation. """ +from __future__ import absolute_import +from __future__ import division +from __future__ import unicode_literals + from math import pi, log from cmath import exp -import digital_swig -import modulation_utils -from utils import mod_codes, gray_code -from generic_mod_demod import generic_mod, generic_demod -from generic_mod_demod import shared_mod_args, shared_demod_args +from . import digital_swig +from . import modulation_utils +from .utils import mod_codes, gray_code +from .generic_mod_demod import generic_mod, generic_demod +from .generic_mod_demod import shared_mod_args, shared_demod_args # Default number of points in constellation. _def_constellation_points = 4 @@ -56,7 +60,7 @@ def create_encodings(mod_code, arity, differential): else: raise ValueError('That modulation code is not implemented for this constellation.') return (pre_diff_code, post_diff_code) - + # ///////////////////////////////////////////////////////////////////////////// # PSK constellation # ///////////////////////////////////////////////////////////////////////////// @@ -68,7 +72,7 @@ def psk_constellation(m=_def_constellation_points, mod_code=_def_mod_code, """ k = log(m) / log(2.0) if (k != int(k)): - raise StandardError('Number of constellation points must be a power of two.') + raise Exception('Number of constellation points must be a power of two.') points = [exp(2*pi*(0+1j)*i/m) for i in range(0,m)] pre_diff_code, post_diff_code = create_encodings(mod_code, m, differential) if post_diff_code is not None: @@ -84,7 +88,7 @@ def psk_constellation(m=_def_constellation_points, mod_code=_def_mod_code, class psk_mod(generic_mod): """ Hierarchical block for RRC-filtered PSK modulation. - + The input is a byte stream (unsigned char), treated as a series of packed symbols. Symbols are grouped from MSB to LSB. @@ -118,7 +122,7 @@ class psk_demod(generic_demod): """ Hierarchical block for RRC-filtered PSK modulation. - + The input is a complex modulated signal at baseband. The output is a stream of bytes, each representing a recovered bit. |