Signal processing apparatus and radar apparatus

Abstract

A signal processing apparatus of a radar transceiver is provided. The radar transceiver transmits a frequency-modulated transmission signal and generates beat signals having a frequency difference between transmitted/received signals for respective receiving antennas. A distance detection section detects relative distances of objects based on frequencies of the beat signals. A phase detection section detects phases of the beat signals. A level storage section stores a first level of the beat signals that corresponds to the first object and a second level of the beat signals that corresponds to the second object when the beat signals are generated corresponding to the plurality of objects, respectively. A phase derivation section derives first and second phases in which the level of a single beat signal coincides with a sum of the first level corresponding to the first phase and the second level corresponding to the second phase on the basis of the wavelength of the beat signal and the relative distances of the plurality of objects, when the signal beat signal is generated corresponding to the plurality of objects. An azimuth angle detection section derives an azimuth angle of the first object based on the difference of the first phase and an azimuth angle of the second object based on the difference of the second phase in a pair of the antennas.

Dependencies are inferred from the claim text.