Determination of the selective filter response to the frequency-shift signal with the sine enveloping curve by the help of the orthogonal components method

In this paper is studied the passing of a frequency-shift keyed (FSK) sequence of radio pulse signals, with a sine envelope curve, through a selective filter. The derived design relations for the filter response, with an accuracy up to the RF filling phase, may be used in the process of development and investigation of electronic systems (ES) for communication, radiolocation and navigation which use pseudorandom sequences with a frequency-shift modulation.