Radar device
AssigneeMitsubishi Electric Corporation
InventorsKenichi AKITA, Kado NAKAGAWA
Life of this patent
Estimating the term…
Abstract
A radar device is mounted on a vehicle, for detecting an object, and includes: a transmitting unit for transmitting an electromagnetic wave as a transmitter signal; a receiving unit for receiving a reflected signal that is reflected from the object as a receiver signal; a signal processing unit for measuring a distance and a relative velocity between the vehicle and the object on the basis of a beat signal that is obtained by the transmitter signal and the receiver signal; and an interference detecting unit for detecting the interference signal from another radar device or a communication device on the basis of a signal intensity of the frequency range that is not used for measuring the distance to the object and the relative velocity of the object.
Claims5
A radar device, which is mounted on a vehicle for detecting an object, comprising:
- transmitting means for transmitting an electromagnetic wave as a transmitter signal;
- receiving means for receiving a reflected signal that is reflected from the object as a receiver signal;
- signal processing means for measuring a distance and a relative velocity between the vehicle and the object on the basis of a beat signal that is obtained by the transmitter signal and the receiver signal;
- and
- interference detecting means for dividing frequencies that are obtained by frequency analysis of the signal processing means into a frequency range that is used for measuring the distance to the object and the relative velocity of the object and a frequency range that is not used for measuring the distance to the object and the relative velocity of the objet to detect an interference signal from one of another radar device and a communication device on the basis of a signal intensity within the frequency range that is not used for measuring the distance to the object and the relative velocity of the object;
- wherein the radar device is an FM-pulse Doppler radar system, and
- wherein the interference detecting means monitors whether the signal intensity within the frequency range that is not used for measuring the distance to the object and the relative velocity of the object in all beam directions at a time of antenna scanning exceeds a threshold value or not, and a measurement of the distance to the object and the relative velocity of the object in the beam directions is prevented when detecting the interference signal that exceeds the threshold value from the another radar device and the communication device in a given beam direction.
Dependencies are inferred from the claim text.