http://www.mathworks.com/matlabcentral/fileexchange/41323-continous-fractional-fourier-transform-frft

Is this the same? 

Dear William,Thanks for the reply.No This is not that one.

There are several paper on STFrFT, but i tried to implement but something going wrong. Can't understand?

Some references:1)  Short-time fractional Fourier transform and its applications

http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=5170060

IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 58, NO. 5, MAY 2010 Short-Time Fractional Fourier Transform and Its Applications Ran Tao, Senior Member, IEEE, Yan-Lei Li, and Yue Wang.   see carefully and tried u will suceed if u implement 

some how we can do continuous stfrft based on my paper i.e,

Interpretation of Dirichlet, Bartlett, Hanning and Hamming windows using Fractional Fourier Transform

P.V.Muralidhar.please go thru it and solve it sir