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wnoise

Noisy wavelet test data

Calling Sequence

X = wnoise(FUN,N)
[X,XN] = wnoise(FUN,N,SQRT_SNR)
[X,XN] = wnoise(FUN,N,SQRT_SNR,INIT)

Parameters

N
: vector length of X = 2^N
FUN

: FUN = 1 or 'blocks'

: FUN = 2 or 'bumps'

: FUN = 3 or 'heavy sine'

: FUN = 4 or 'doppler'

: FUN = 5 or 'quadchirp'

: FUN = 6 or 'mishmash'

INIT
: generator seed is set to INIT value.
SQRT_SNR
: sets std(X) = SQRT_SNR
X
: test data
XN
: noisy test data (rand(1,N,'normal') is added!)

Description

Noisy wavelet test data

Examples

[x,noisyx] = wnoise(4,10,7);
ind = linspace(0,1,2^10); 
for i = 1:6 
x = wnoise(i,10); 
subplot(6,1,i), plot(ind,x) 
end

Authors

Holger Nahrstaedt

See Also

<< wmaxlev wavelet toolbox wnoisest >>