RADAR APPARATUS AND DISTANCE MEASURING METHOD

摘要

A transport signal generating part (1) generates a transport signal that is a pseudo random signal having a substantially non-periodic characteristic. A transmitting part (2) radiates a transport wave obtained by modulating an electromagnetic wave with the transport signal, and a receiving part (3) receives a reflected wave. A phase-only correlation calculating part (5) comprises a first Fourier transforming part that subjects the transport signal and received signal to a one-dimensional discrete Fourier transformation; a combining part that combines the Fourier transport signal with the Fourier received signal; an amplitude suppressing part that suppresses the amplitude of the combined Fourier signal; a second Fourier transforming part that subjects the combined Fourier signal as amplitude suppressed to a one-dimensional discrete Fourier transformation or a one-dimensional discrete inverse Fourier transformation; a delay time determining part that determines, based on the peak position of a correlation signal, a delay time; and a distance calculating part that calculates, based on the delay time, the distance from an object.