-
Notifications
You must be signed in to change notification settings - Fork 3
/
Copy pathmakesig.m
executable file
·211 lines (208 loc) · 7.07 KB
/
makesig.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
function [x,N] = makesig(SigName,N)
% [x,N] = makesig(SigName,N) Creates artificial test signal identical to the
% standard test signals proposed and used by D. Donoho and I. Johnstone
% in WaveLab (- a matlab toolbox developed by Donoho et al. the statistics
% department at Stanford University).
%
% Input: SigName - Name of the desired signal (Default 'all')
% 'AllSig' (Returns a matrix with all the signals)
% 'HeaviSine'
% 'Bumps'
% 'Blocks'
% 'Doppler'
% 'Ramp'
% 'Cusp'
% 'Sing'
% 'HiSine'
% 'LoSine'
% 'LinChirp'
% 'TwoChirp'
% 'QuadChirp'
% 'MishMash'
% 'Werner Sorrows' (Heisenberg)
% 'Leopold' (Kronecker)
% N - Length in samples of the desired signal (Default 512)
%
% Output: x - vector/matrix of test signals
% N - length of signal returned
%
% See also:
%
% References:
% WaveLab can be accessed at
% www_url: http://playfair.stanford.edu/~wavelab/
% Also see various articles by D.L. Donoho et al. at
% web_url: http://playfair.stanford.edu/
%File Name: makesig.m
%Last Modification Date: 08/30/95 15:52:03
%Current Version: makesig.m 2.4
%File Creation Date: Thu Jun 8 10:31:11 1995
%Author: Jan Erik Odegard <[email protected]>
%
%Copyright (c) 2000 RICE UNIVERSITY. All rights reserved.
%Created by Jan Erik Odegard, Department of ECE, Rice University.
%
%This software is distributed and licensed to you on a non-exclusive
%basis, free-of-charge. Redistribution and use in source and binary forms,
%with or without modification, are permitted provided that the following
%conditions are met:
%
%1. Redistribution of source code must retain the above copyright notice,
% this list of conditions and the following disclaimer.
%2. Redistribution in binary form must reproduce the above copyright notice,
% this list of conditions and the following disclaimer in the
% documentation and/or other materials provided with the distribution.
%3. All advertising materials mentioning features or use of this software
% must display the following acknowledgment: This product includes
% software developed by Rice University, Houston, Texas and its contributors.
%4. Neither the name of the University nor the names of its contributors
% may be used to endorse or promote products derived from this software
% without specific prior written permission.
%
%THIS SOFTWARE IS PROVIDED BY WILLIAM MARSH RICE UNIVERSITY, HOUSTON, TEXAS,
%AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
%BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
%FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RICE UNIVERSITY
%OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
%EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
%PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
%OR BUSINESS INTERRUPTIONS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
%WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
%OTHERWISE), PRODUCT LIABILITY, OR OTHERWISE ARISING IN ANY WAY OUT OF THE
%USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
%
%For information on commercial licenses, contact Rice University's Office of
%Technology Transfer at [email protected] or (713) 348-6173
%
%Change History: This m-file is a copy of the code provided with WaveLab
% customized to be consistent with RWT.
% Jan Erik Odegard <[email protected]> Thu Jun 8 1995
%
if(nargin < 1)
SigName = 'AllSig';
N = 512;
elseif(nargin == 1)
N = 512;
end;
t = (1:N) ./N;
x = [];
y = [];
if(strcmp(SigName,'HeaviSine') | strcmp(SigName,'AllSig')),
y = 4.*sin(4*pi.*t);
y = y - sign(t - .3) - sign(.72 - t);
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Bumps') | strcmp(SigName,'AllSig')),
pos = [ .1 .13 .15 .23 .25 .40 .44 .65 .76 .78 .81];
hgt = [ 4 5 3 4 5 4.2 2.1 4.3 3.1 5.1 4.2];
wth = [.005 .005 .006 .01 .01 .03 .01 .01 .005 .008 .005];
y = zeros(size(t));
for j =1:length(pos)
y = y + hgt(j)./( 1 + abs((t - pos(j))./wth(j))).^4;
end
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Blocks') | strcmp(SigName,'AllSig')),
pos = [ .1 .13 .15 .23 .25 .40 .44 .65 .76 .78 .81];
hgt = [4 (-5) 3 (-4) 5 (-4.2) 2.1 4.3 (-3.1) 2.1 (-4.2)];
y = zeros(size(t));
for j=1:length(pos)
y = y + (1 + sign(t-pos(j))).*(hgt(j)/2) ;
end
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Doppler') | strcmp(SigName,'AllSig')),
y = sqrt(t.*(1-t)).*sin((2*pi*1.05) ./(t+.05));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Ramp') | strcmp(SigName,'AllSig')),
y = t - (t >= .37);
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Cusp') | strcmp(SigName,'AllSig')),
y = sqrt(abs(t - .37));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Sing') | strcmp(SigName,'AllSig')),
k = floor(N * .37);
y = 1 ./abs(t - (k+.5)/N);
end;
x = [x;y];
y = [];
if(strcmp(SigName,'HiSine') | strcmp(SigName,'AllSig')),
y = sin( pi * (N * .6902) .* t);
end;
x = [x;y];
y = [];
if(strcmp(SigName,'LoSine') | strcmp(SigName,'AllSig')),
y = sin( pi * (N * .3333) .* t);
end;
x = [x;y];
y = [];
if(strcmp(SigName,'LinChirp') | strcmp(SigName,'AllSig')),
y = sin(pi .* t .* ((N .* .125) .* t));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'TwoChirp') | strcmp(SigName,'AllSig')),
y = sin(pi .* t .* (N .* t)) + sin((pi/3) .* t .* (N .* t));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'QuadChirp') | strcmp(SigName,'AllSig')),
y = sin( (pi/3) .* t .* (N .* t.^2));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'MishMash') | strcmp(SigName,'AllSig')),
% QuadChirp + LinChirp + HiSine
y = sin( (pi/3) .* t .* (N .* t.^2)) ;
y = y + sin( pi * (N * .6902) .* t);
y = y + sin(pi .* t .* (N .* .125 .* t));
end;
x = [x;y];
y = [];
if(strcmp(SigName,'WernerSorrows') | strcmp(SigName,'AllSig')),
y = sin( pi .* t .* (N/2 .* t.^2)) ;
y = y + sin( pi * (N * .6902) .* t);
y = y + sin(pi .* t .* (N .* t));
pos = [ .1 .13 .15 .23 .25 .40 .44 .65 .76 .78 .81];
hgt = [ 4 5 3 4 5 4.2 2.1 4.3 3.1 5.1 4.2];
wth = [.005 .005 .006 .01 .01 .03 .01 .01 .005 .008 .005];
for j =1:length(pos)
y = y + hgt(j)./( 1 + abs((t - pos(j))./wth(j))).^4;
end
end;
x = [x;y];
y = [];
if(strcmp(SigName,'Leopold') | strcmp(SigName,'AllSig')),
y = (t == floor(.37 * N)/N); % Kronecker
end;
x = [x;y];
y = [];
% disp(sprintf('MakeSignal: I don*t recognize << %s>>',SigName))
% disp('Allowable SigNames are:')
% disp('AllSig'),
% disp('HeaviSine'),
% disp('Bumps'),
% disp('Blocks'),
% disp('Doppler'),
% disp('Ramp'),
% disp('Cusp'),
% disp('Crease'),
% disp('Sing'),
% disp('HiSine'),
% disp('LoSine'),
% disp('LinChirp'),
% disp('TwoChirp'),
% disp('QuadChirp'),
% disp('MishMash'),
% disp('WernerSorrows'),
% disp('Leopold'),
%end