Coherence function

Estimation of the coherence with the MVDR method.

Description

This program is a new way to estimate the coherence function. It's based on the MVDR and is much more reliable than the classical Welch's method implemented in MATLAB.

There are 2 programs: the main program called coherence_MVDR.m and and an example, called illustrate.m, that calls the main function to show how it works. There also included 2 papers that we published on this algorithm.

• Required Products: Signal Processing Toolbox
• MATLAB release: MATLAB 7.0.1 (R14SP1)

[urs (us) schwarz]

promising function with a debilitating disease:
- the help section urgently needs a %-marker in line#8
i leave it to duane hanselman and john d'errico to comment about the use of INV in this particular context...
us

[Duane Hanselman]

Help text is useless. See the help text for mscohere for guidance. Note that the MATLAB function cohere has been replaced by mscohere. Your algorithm may be publishable, but your implementation of it is very weak. For example, diag(diag(ones(L))) is equal to eye(L) for scalar L. The function inv should not be used unless there is NO other choice. It is easily avoided here.

[Yin Zhou]

This coherence function is very helpful! Thanks for shareing. I am now trying to use it into an audio signal processing applicaiton to replace the MATLAB mscohere function.

[ouanani mouloud]

the coherrence function of ground motion in matlab

[Ibrahim M]

Thanks Jacob for sharing, but can you highlight what makes your coherence function 'more reliable' than the matlab's mscohere?