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NOSHEARLENGTH - Transform length that does not require a frequency shear

Usage

L=noshearlength(Ls,a,M,lt)

Description

noshearlength(Ls,a,M,lt) computes the next larger transform length bigger or equal to Ls for which the shear algorithm does not require a frequency side shear for a non-separable Gabor system specified by a, M and lt.

This property makes computation of the canonical dual and tight Gabor windows gabdual and gabtight and the dgt for a full length window faster, if this transform length is choosen.