Abstract
Noise radar is an emerging technology which employs random signals as their transmit waveforms. Relying on its stochastic properties, with the proper choice of system s parameters, high performance with respect to the suppression of range ambiguity and low range sidelobes can be achieved. Many works have been published in the literature addressing systems that transmit carriers modulated in amplitude by a given stochastic process, generally generated by a hardware noise source. Nevertheless, the characterization of random frequency modulation (more suitable for several applications) is still an on going subject matter. Within this context, in this paper closed form expressions of the narrowband ambiguity function of random frequency modulated signals are presented, and, as a consequence, its Doppler tolerance is better addressed.
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