TARGET SEARCH SIGNAL GENERATING METHOD AND TARGET SEARCH DEVICE

• Main Authors: ATO JUNICHI, NOMOTO SEIJI, SUEDA HACHIRO
• Format: Patent
• Language: English
• Published: 09.09.2010
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To provide a target search device such as a radar system whose detection performance and distance resolution do not deteriorate, even when a target has a speed component moving in the same direction as a target search signal. SOLUTION: When a radar signal for transmitting a plurality of chirp-modulated pulses for searching for a target in one direction is generated, one or both of each pulse width and the distance resolution are determined so as to keep a mutual relation of äPw(i)×Dr(i)=Pw(1)×Dr(1)±Ti×(λ/2)} among the plurality of pulses, and a Doppler shift of each received signal caused by the matter that the target has a speed component moving in the same direction as the radar signal is compensated, to make a time position for each received signal to be compressed the same. Here, Pw(1), Pw(i): the pulse width of a first and i-th transmission pulses; Dr(1), Dr(i): the distance resolution of the first and i-th transmission pulses; Ti: the time interval between the first transmission pulse and the i-th transmission pulse; and λ: the wavelength of transmission radio waves. COPYRIGHT: (C)2010,JPO&INPIT