Range Laws for FM Radars with Harmonic Processing and Arbitrary Modulating Waveshapes,

摘要

The range response of a periodically modulated FM radar is derived for some useful harmonic processing systems in terms of Fourier coefficients which are identical to points on the ambiguity function. The Fourier coefficients are evaluated for a piecewise-linear modulation waveform which may be used to approximate an arbitrary modulating waveshape. Thus,the approximate range response of an arbitrary modulation waveform is obtained. Range laws for incoherent,coherent and directional doppler detection are obtained by vector addition of the properly weighted complex Fourier coefficients. For coherent harmonic processing using an arbitrary periodic waveform for the reference,the phasing of the reference waveform is shown to be of importance in cancelling undesired range sidelobes. (Modified author abstract)