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Time Frequency Toolbox >> Time Frequency Toolbox > Ambiguity Functions > ambifuwb

ambifuwb

Wide-band ambiguity function.

Calling Sequence

[WAF,TAU,THETA]=ambifuwb(X)
[WAF,TAU,THETA]=ambifuwb(X,FMIN)
[WAF,TAU,THETA]=ambifuwb(X,FMIN,FMAX)
[WAF,TAU,THETA]=ambifuwb(X,FMIN,FMAX,N)
[WAF,TAU,THETA]=ambifuwb(X,FMIN,FMAX,N,TRACE)
[WAF,TAU,THETA]=ambifuwb(...,'plot')

Parameters

X :

signal (in time) to be analyzed (the analytic associated signal is considered), of length Nx.

FMIN,FMAX :

respectively lower and upper frequency bounds of the analyzed signal. When specified, these parameters fix the equivalent frequency bandwidth (in Hz). When unspecified, you have to enter them at the command line from the plot of the spectrum. FMIN and FMAX must be >0 and <=0.5.

N :

number of Mellin points (default : automatically determined).

TRACE :

if nonzero, the progression of the algorithm is shown (default : 0).

AF :

matrix containing the coefficients of the ambiguity function. X-coordinate corresponds to the dual variable of scale parameter ; Y-coordinate corresponds to time delay, dual variable of frequency.

'plot' :

When called with the additional argument 'plot', ambifuwb displays the squared modulus of the ambiguity function by means of contour.

TAU :

X-coordinate corresponding to time delay

THETA :

Y-coordinate corresponding to the log(scale) variable

Description

ambifuwb calculates the asymetric wide-band ambiguity function.

Examples

sig=altes(128,0.1,0.45); ambifuwb(sig,'plot');

See also

Authors

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