Comb function

The abstract principle of measurement is multiplication of a continuous function by a comb function... 

According to the convolution theorem (4.2.14), the Fourier transform S(oj) of the echo train is given by the product of the Fourier transform E ( ) of an echo e(f) and the Fourier transform F co) of the delta-comb function /(f). 

From the above definition and/or from Figure A. 1.1 there can be observed the periodicity property of the comb function ... 

FIGURE 3.22 Potential dirac delta ( comb ) function. 

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