Patent ID: 7576688

Claim:
A method for detecting moving objects with a radar, comprising: receiving reflections of a pulsed radar transmission, said reflections constituting a received signal, collecting samples of the received signal over an integration period, forming a match function, the terms of which contain a product of a sample of said received signal and a delayed-in-time, Doppler-shifted replica of a transmission and depend on parameters that describe an object that caused a reflection of the transmission, and finding most probable values of the parameters by maximizing the match function through Fourier transforming a vector consisting of terms of the match function; characterized in that in order to compose the vector to be Fourier transformed it comprises: computing those of said products that contain a non-zero contribution of said delayed-in-time, Doppler-shifted replica of a transmission, and letting others of said products be zero, thus forming preliminary terms of the vector to be Fourier transformed, forming blocks of said preliminary terms, taking those of said blocks as final terms to the vector to be Fourier transformed that have nonzero value, by preserving the mutual order of said nonzero-valued blocks but leaving out intermittent blocks that have zero value, and outputting, as said most probable values of the parameters, those values that result from Fourier transforming the vector consisting of said final terms.