Patent ID: 6833808
Filing Date: 2004-12-21
Classification: G01S

Abstract:
A method of discriminating a time variable target radar signal from a background including the steps of:I) acquiring range variable return signals from a series of radar pulses, the returns having variable amplitude and phases; II) sampling each of the returns to produce a set of ranged signals attributable to a set of range cells, the ranged signals having variable amplitude and phase for each range cell; characterised by the steps of:III) obtaining an estimate for the variation in phase drift between the transmission and reception of the ranged signals for each range cell; IV) producing a smooth function representative of the variation in phase of the ranged signals between nearby range cells in each of the returns; V) modifying the acquired range variable returns with respect to the function representative of the variation in phase between nearby range cells in order to obtain a corrected value for the amplitude and phase of each return signal; VI) operating on the corrected set of range variable returns so as to identify an object having a relative velocity with respect to a receiver in a range cell.