diff options
Diffstat (limited to 'gnuradio-core/src/lib/general/gri_lfsr.h')
| -rw-r--r-- | gnuradio-core/src/lib/general/gri_lfsr.h | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/gnuradio-core/src/lib/general/gri_lfsr.h b/gnuradio-core/src/lib/general/gri_lfsr.h index dc9358572b..4202360774 100644 --- a/gnuradio-core/src/lib/general/gri_lfsr.h +++ b/gnuradio-core/src/lib/general/gri_lfsr.h @@ -1,19 +1,19 @@ /* -*- c++ -*- */ /* * Copyright 2008,2010 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, @@ -32,9 +32,9 @@ * \ingroup misc * * Generates a maximal length pseudo-random sequence of length 2^degree-1 - * + * * Constructor: gri_lfsr(int mask, int seed, int reg_len); - * + * * mask - polynomial coefficients representing the locations * of feedback taps from a shift register which are xor'ed * together to form the new high order bit. @@ -48,32 +48,32 @@ * durring initialization. Low order bit corresponds * to x^0 coefficient -- the first to be shifted as output. * - * reg_len - specifies the length of the feedback shift register + * reg_len - specifies the length of the feedback shift register * to be used. Durring each iteration, the register * is rightshifted one and the new bit is placed in bit reg_len. * reg_len should generally be at least order(mask) + 1 * * - * see http://en.wikipedia.org/wiki/Linear_feedback_shift_register + * see http://en.wikipedia.org/wiki/Linear_feedback_shift_register * for more explanation. * * * * next_bit() - Standard LFSR operation - * + * * Perform one cycle of the LFSR. The output bit is taken from * the shift register LSB. The shift register MSB is assigned from * the modulo 2 sum of the masked shift register. - * + * * next_bit_scramble(unsigned char input) - Scramble an input stream - * + * * Perform one cycle of the LFSR. The output bit is taken from * the shift register LSB. The shift register MSB is assigned from * the modulo 2 sum of the masked shift register and the input LSB. * * next_bit_descramble(unsigned char input) - Descramble an input stream * - * Perform one cycle of the LFSR. The output bit is taken from + * Perform one cycle of the LFSR. The output bit is taken from * the modulo 2 sum of the masked shift register and the input LSB. * The shift register MSB is assigned from the LSB of the input. * @@ -101,8 +101,8 @@ class GR_CORE_API gri_lfsr public: gri_lfsr(uint32_t mask, uint32_t seed, uint32_t reg_len) - : d_shift_register(seed), - d_mask(mask), + : d_shift_register(seed), + d_mask(mask), d_seed(seed), d_shift_register_length(reg_len) { |