| Wavelet Toolbox | |
Syntax
[PSI,X] = fbspwavf(LB,UB,N,M,FB,FC)
Description
[PSI,X] = fbspwavf(LB,UB,N,M,FB,FC) returns values of the complex frequency B-Spline wavelet defined by the order parameter M (M is an integer such that 1 
M), a bandwidth parameter FB, and a wavelet center frequency FC.
The function PSI is computed using the explicit expression:
PSI(X) = (FB^0.5)*((sinc(FB*X/M).^M).*exp(2*i*pi*FC*X))
on an N point regular grid in the interval [LB,UB].
FB and FC must be such that: FC > FB/2 > 0
Output arguments are the wavelet function PSI computed on the grid X.
Examples
% Set order, bandwidth and center frequency parameters.
m = 2; fb = 1; fc = 0.5;
% Set effective support and grid parameters.
lb = -20; ub = 20; n = 1000;
% Compute complex Frequency B-Spline wavelet fbsp2-1-0.5.
[psi,x] = fbspwavf(lb,ub,n,m,fb,fc);
% Plot complex Frequency B-Spline wavelet.
subplot(211)
plot(x,real(psi))
title('Complex Frequency B-Spline wavelet fbsp2-1-0.5')
xlabel('Real part'), grid
subplot(212)
plot(x,imag(psi))
xlabel('Imaginary part'), grid
See Also
waveinfo
References
Teolis, A. (1998), Computational signal processing with wavelets, Birkhauser, p. 63.
| | entrupd | gauswavf | |
