Patent ID: 6856278
Filing Date: 2005-02-15
Classification: G01S

Abstract:
1. A radar comprising: a transmitting/receiving unit for transmitting a transmitting signal such that an up-modulating interval, in which a frequency gradually increases, changes repeatedly and a down-modulating interval in which a frequency gradually decreases, changes repeatedly, and for receiving a reception signal including a reflected signal from a target; a scanning unit for varying a beam bearing of said transmitting signal for a predetermined scanning range; a frequency-analyzing unit for obtaining data on a frequency spectrum of a beat signal of said transmitting signal and said reception signal; a detecting unit for detecting at least one of a relative distance to said target and a relative speed to said target on the basis of a peak frequency which appears in a frequency spectrum at said up-modulating interval and a peak frequency which appears in a frequency spectrum at said down-modulating interval; and a pairing unit which determines a peak frequency of a peak which appears in said frequency spectrum with regard to each of said up-modulating interval and said down-modulating interval in said beam bearing, which extracts a signal-intensity profile at a frequency that is substantially equal to the peak frequency with regard to a plurality of beams which are adjacent to said predetermined beam bearing, which determines correlation levels between profiles at said up-modulating interval and said down-modulating interval, and which selects a combination of said profiles having the highest correlation level.