초록 ▼

A radar system including a means for distinguishing signals returned from (i.e., reflected by) objects that are stationary with respect to earth (i.e., "stationary objects") from signals returned from objects that are moving along with a host vehicle (i.e., the vehicle upon which the radar system is

A radar system including a means for distinguishing signals returned from (i.e., reflected by) objects that are stationary with respect to earth (i.e., "stationary objects") from signals returned from objects that are moving along with a host vehicle (i.e., the vehicle upon which the radar system is mounted). The system includes a radar antenna having a relatively narrow beam width centered at a "squint" angle .theta.. When the antenna is aimed such that the center of the beam is at a squint angle of .theta.=60.degree., the Doppler frequency of signals that are reflected from targets that are stationary along the roadside is significantly higher than the frequency of signals reflected from targets that are in the blind spot to the right-rear of the host vehicle and which are moving along with the host vehicle.

대표청구항 ▼

[ What is claimed is:] [16.] A side-looking radar system for detecting objects in a blind spot of a host vehicle upon which the side-looking radar system is mounted, the side-looking radar system including:(a) a Doppler radar circuit for:(1) transmitting a radar signal;(2) receiving reflections of t

[ What is claimed is:] [16.] A side-looking radar system for detecting objects in a blind spot of a host vehicle upon which the side-looking radar system is mounted, the side-looking radar system including:(a) a Doppler radar circuit for:(1) transmitting a radar signal;(2) receiving reflections of the transmitted radar signal;(3) detecting a Doppler shift that has occurred between the transmission and reception of the transmitted radar signal; and(4) determining the amount of power at each Doppler frequency of the received reflections; and(b) a controller, coupled to the Doppler radar circuit, for:(1) determining whether the objects from which the received reflections have reflected are stationary or are moving along with the host vehicle; and(2) providing an indication that a hazard is present only if the object is detected and determined not to be stationary.