3 This file is part of a program that implements a Software-Defined Radio.
5 Copyright (C) 2004 by Frank Brickle, AB2KT and Bob McGwier, N4HY
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 The authors can be reached by email at
29 The DTTS Microwave Society
40 #include <datatypes.h>
44 #define LMADF_INTERFERENCE 0
46 #define LMADF_NOSIG (-1)
47 #define LMADF_NOLINE (-2)
48 #define LMADF_NOFILT (-3)
56 typedef struct _LMSR {
57 CXB signal; /* Signal Buffer */
58 int signal_size; /* Number of samples in signal buffer */
59 REAL *delay_line; /* Delay Line circular buffer for holding samples */
60 REAL *adaptive_filter; /* Filter coefficients */
61 REAL adaptation_rate; /* Adaptation rate for the LMS stochastic gradient */
62 REAL leakage; /* Exponential decay constant for filter coefficients */
63 int adaptive_filter_size; /* number taps in adaptive filter */
64 int filter_type; /* Filter type */
65 int delay; /* Total delay between current sample and filter */
66 int delay_line_ptr; /* Pointer for next sample into the delay line */
67 int size; /* Delay line size */
68 int mask; /* Mask for circular buffer */
73 typedef struct _LMSR {
74 CXB signal; /* Signal Buffer */
75 int signal_size; /* Number of samples in signal buffer */
76 COMPLEX *delay_line; /* Delay Line circular buffer for holding samples */
77 COMPLEX *adaptive_filter; /* Filter coefficients */
78 REAL adaptation_rate; /* Adaptation rate for the LMS stochastic gradient */
79 REAL leakage; /* Exponential decay constant for filter coefficients */
80 int adaptive_filter_size; /* number taps in adaptive filter */
81 int filter_type; /* Filter type */
82 int delay; /* Total delay between current sample and filter */
83 int delay_line_ptr; /* Pointer for next sample into the delay line */
84 int size; /* Delay line size */
85 int mask; /* Mask for circular buffer */
90 extern LMSR new_lmsr(CXB signal,
94 int adaptive_filter_size,
97 extern void del_lmsr(LMSR lms);
99 extern void lmsr_adapt(LMSR lms);