Gabor representation of a signal.
[TFR,DGR,GAM]=tfrgabor(SIG,N,Q) [TFR,DGR,GAM]=tfrgabor(SIG,N,Q,H) [TFR,DGR,GAM]=tfrgabor(SIG,N,Q,H,TRACE) [TFR,DGR,GAM]=tfrgabor(...,'plot')
signal to be analyzed (length(SIG)=N1).
number of Gabor coefficients in time (N1 must be a multiple of N) (default : divider(N1)).
degree of oversampling ; must be a divider of N (default : Q=divider(N)).
synthesis window, which was originally chosen as a Gaussian window by Gabor. Length(H) should be as closed as possible from N, and must be >=N (default : Gauss(N+1)). H must be of unit energy, and CENTERED.
if nonzero, the progression of the algorithm is shown (default : 0).
if one input parameter is 'plot', tfrgabor runs tfrqview. and TFR will be plotted
Square modulus of the Gabor coefficients.
Gabor coefficients (complex values).
biorthogonal (dual frame) window associated to H.
tfrgabor computes the Gabor representation of signal X, for a given synthesis window H, on a rectangular grid of size (N,M) in the time-frequency plane. M and N must be such that N1 = M * N / Q where N1=length(X) and Q is an integer corresponding to the degree of oversampling. If Q=1, the time-frequency plane (TFP) is critically sampled, so there is no redundancy in the TFP. If Q>1, the TFP is oversampled, allowing a greater numerical stability of the algorithm.