Patent ID: 7724802
Filing Date: 2010-05-25
Classification: G01S,H04B

Abstract:
1. A radar apparatus comprising: a transmission section that transmits a signal wave, which is spectrum spread with using a spread code; a delay device that gives delay to the spread code; a reception section that receives the transmission of the signal wave reflected by an object and spectrum despreads the reflected wave with using the delayed spread code to output a despread signal; a switch control section that generates a switching frequency and controls at least one of a gain of an amplifier provided in the transmission section, a gain of an amplifier provided in the reception section and an operation of the delay device based on the switching frequency; a switching frequency detection section that detects a switching frequency component from the despread signal that corresponds to the switching frequency received from the switch control section; and a relative distance calculation section that calculates a distance between the radar apparatus and the object based on a detection result provided by the switching frequency detection section and an amount of the delay given by the delay device.