Patent ID: 7629920

Claim:
A method for at least one of detecting and locating a target by the use of radar, said method comprising the steps of: transmitting electromagnetic pulses toward a region to be examined; receiving return pulses from a target; sampling in time each of said return pulses to thereby generate a plurality of pulses, each of said pulses including a plurality of different range samples; assuming a set of target speeds; for each of said assumed target speeds, determining the amount of temporal shift which should occur between each of said return pulses, to thereby generate plural sets of return pulses with mutual delays, where the mutual delays of each set of return pulses expresses one of said assumed target speeds; integrating the signals in each reference range over a set of return pulses, to thereby generate a set of integrated range samples for each assumed target speed; normalizing the values of each of said integrated range samples for each assumed target speed, to thereby generate normalized integrated range samples; for each of said assumed target speeds, calculating entropy from said normalized integrated range samples for each assumed speed, to thereby generate an entropy value for each assumed speed; determining that speed estimate resulting in the set of normalized integrated range samples expressing the minimum value of entropy; and determining at least one of the presence and location of said target by integrating said return pulses using the speed estimate associated with said minimum value of entropy.