The techniques and systems herein enable ghost object detection. Specifically, a reflection line indicative of a potential reflection surface between first and second moving objects is determined. If enough stationary objects are within an area of the reflection line, it is determined whether one or more of the stationary objects within the area are within a distance of a reflection point. An expected velocity of the second object is then determined and checked against a velocity of the second object. If the expected velocity is near the velocity, it is determined that the second object is a ghost object. By doing so, the system can effectively identify ghost objects in a wide variety of environments, thereby allowing for downstream operations to function as designed.

The method of performing a positioning of a first apparatus by the first apparatus, transmitting a first signal to a second apparatus through at least one antenna; receiving a second signal from the second apparatus through each of the at least one antenna, wherein the second signal includes a bit related with a tag identifier(ID) of the second apparatus; obtaining the tag ID of the second apparatus, which is related with absolute location information of the second apparatus, based on the bit; and performing the positioning of the first apparatus, based on the first signal, the second signal, and the tag ID of the second apparatus.

A vehicle-to-vehicle communications system utilizes passive modulation of radar signals to communicate information between vehicles. Passive radar modulators may be provided at the rear of a forward vehicle and used to enrich radar interrogation signals from a rearward vehicle with additional information. Since radar transceivers are already located on a great deal of modern vehicles, this functionality may be easily retrofitted into many vehicles without the addition of a radar transceiver. A number of vehicles in a line of vehicles may pass information back through the line by passive modulation of radar interrogation signals from each vehicle. Accordingly, a vehicle may gain information about vehicles ahead of the one directly in front of it, thereby enabling “see through radar” functionality.

A system for estimating a distance between vehicles may include an oscillator, a transmitter, a receiver, a summing circuit, a signal analyzer, a tunable phase shifter, a distance estimator, and/or a vehicle identifier. The oscillator may generate a generated oscillating signal, transmitted by the transmitter. The receiver may receive a processed signal derived by a system of a second vehicle. The summing circuit may add the generated oscillating signal to the received signal to produce the updated oscillating signal. The signal analyzer may detect a spike in amplitude associated with the updated oscillating signal. The tunable phase shifter may shift a phase of the generated oscillating signal by an incremental phase shift amount until a spike in amplitude is detected. The distance estimator may estimate the distance between the first vehicle and the second vehicle based on a total phase shift amount and the predetermined wavelength.

A vehicle and a control method thereof are capable of performing autonomous navigation by diagnosing a failure of the vehicle and a neighboring vehicle on the basis of position information derived by the vehicle and the neighboring vehicle. The vehicle includes a sensor unit, a communication unit configured to communicate with a neighboring vehicle, and a control unit. The control unit is configured to determine first position information of the vehicle on the basis of information acquired by the sensor unit, receive second position information of the vehicle determined by the neighboring vehicle, and determine that at least one of the vehicle or the neighboring vehicle is in a failure state when a difference between the first position information and the second position information exceeds a reference value.

An object detection apparatus includes a radar apparatus, an image capture device, a radar-detection target position detection section, and an image-detection target position detection section. In the apparatus, it is determined that the radar-detection target and the image-detection target are identical when a positional relationship between the targets corresponds to a predetermined relationship. Mitigation control for mitigating a collision between the own vehicle and an identical target is executed when the radar-detection target and the image-detection target are determined to be identical and the distance between the own vehicle and the identical target is smaller than a predetermined distance. Execution of the mitigation control is prevented from being executed, when the distance between the radar-detection target and the image-detection target has increased or decreased monotonically for an interval longer than a predetermined interval.

The present invention relates to a system and a method for correcting position information of a surrounding vehicle, which provide accurate position information of a surrounding vehicle by correcting the position information of the surrounding vehicle received through vehicle-to-vehicle communication, and identifies a license-plate number of a front vehicle through a sensor mounted in a vehicle, calculates a position of the front vehicle, and compare position information, which is included in information including the identified number of the front vehicle in information received from the surrounding vehicle, with the calculated position of the front vehicle to correct the position information of the surrounding vehicle.

A radar sensor system transmits a radar signal that comprises first pulses in a first frequency band and second pulses in a second frequency band. The radar sensor system receives a return of the radar signal from a target, wherein the return comprises the first pulses and the second pulses. The radar sensor system computes a coarse range estimate to the target. Based upon the coarse range estimate, the radar sensor system further computes a fine range estimate to the target, where a resolution of the fine range estimate is based upon a third frequency band that has a bandwidth greater than the first frequency band or the second frequency band.

A radar sensor system transmits a radar signal that comprises first pulses in a first frequency band and second pulses in a second frequency band. The radar sensor system receives a return of the radar signal from a target, wherein the return comprises the first pulses and the second pulses. The radar sensor system concatenates the first pulses and the second pulses, and computes an estimated range to a target based upon a Fourier transform of the concatenated first and second pulses. A range resolution of the estimated range is based upon a bandwidth of a third frequency band that includes the first frequency band and the second frequency band.

The present invention relates to a system and a method for correcting position information of a surrounding vehicle, which provide accurate position information of a surrounding vehicle by correcting the position information of the surrounding vehicle received through vehicle-to-vehicle communication, and identifies a license-plate number of a front vehicle through a sensor mounted in a vehicle, calculates a position of the front vehicle, and compare position information, which is included in information including the identified number of the front vehicle in information received from the surrounding vehicle, with the calculated position of the front vehicle to correct the position information of the surrounding vehicle.