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midpoint

Mid-point construction used in the interference diagram.

Calling Sequence

[TI,FI]=midpoint(T1,F1,T2,F2,K)

Parameters

T1 :

time-coordinate of the first point

F1 :

frequency-coordinate of the first point (>0)

T2 :

time-coordinate of the second point

F2 :

frequency-coordinate of the second point (>0)

K :

power of the group-delay law

K = 2 :

Wigner-Ville

K = 1/2 :

D-Flandrin

K = 0 :

Bertrand (unitary)

K = -1 :

Unterberger (active)

K = inf :

Margenau-Hill-Rihaczek

TI :

time-coordinate of the interference term

FI :

frequency-coordinate of the interference term

Description

midpoint gives the coordinates in the time-frequency plane of the interference-term corresponding to the points (T1,F1) and (T2,F2), for a distribution in the affine class perfectly localized on power-law group-delays of the form : tx(nu)=t0+c nu^(K-1).

See also

Authors

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