The present invention relates to a radar device for a vehicle which may determine a target as a single target or multiple targets according to a dispersion level of a slope for each reception channel, calculated through a phase difference for each reception channel of a reflection signal and an arrangement interval for each reception channel, and estimate the angle of the target so as to acquire the angle of the target using a small amount of calculations, and a method for estimating the angle of a target using the same. An embodiment of the present invention provides a radar device for a vehicle, which detects a target located in the front side of a vehicle, comprising an electronic control unit configured to: calculate the slope of a reflection signal received for each reception channel, using a phase difference for each reception channel of the reflection signal and an arrangement interval for each reception channel, wherein the reflection signal is obtained by transmitting a predetermined transmission signal and receiving the transmitted transmission signal which is reflected back from the target; and determine the target as a single target or multiple targets according to a dispersion level of the calculated slope so as to estimate the angle to the determined target.

A radar system in which Coded Aperture Radar processing is performed on received radar signals reflected by one or more objects in a field of view which reflect a transmitted signal which covers a field of view with K sweeps and each sweep including Q frequency changes. For Type II CAR, the transmitted signal also includes N modulated codes per frequency step. The received radar signals are modulated by a plurality of binary modulators the results of which are applied to a mixer. The output of the mixer, for one acquisition results in a set of Q.Math.K (for Type I CAR) or Q.Math.K.Math.N (for Type II CAR) complex data samples, is distributed among a number of digital channels, each corresponding to a desired beam direction. For each channel, the complex digital samples are multiplied, sample by sample, by a complex signal mask that is different for each channel.

A system and method for mitigating multipath propagation are disclosed herein. The method may include collecting a plurality of detections of a target, forming a plurality of models each assuming at least one parameter causing multipath propagation, determining which model best fits the detections of the target, using the best fit model to approximate the ground conditions, and using the approximated ground conditions to remove the multipath error from the observed signals.

A vehicle control system may include a controller that detects an object outside a vehicle, calculates an angle based on a ratio of a relative speed between the object and the vehicle to a speed of the vehicle, and updates a phase curve reflecting a phase distortion of an input signal based on the calculated angle.

An angular error estimation device calculates, for detected stationary objects, a moving direction indication value indicating a moving direction of a stationary object viewed from a movable body assuming that the movable body is traveling in a straight line, for each observation angle at which a radar device has observed the stationary object, based on object detection information and movement locus information. The device classifies moving direction indication values for each observation angle and calculates, as a moving direction average value, an average value of the moving direction indication values classified by the observation angle for each observation angle. The device calculates the angular error for each observation angle based on an average movement locus calculated based on the moving direction average values for each observation angle and a reference movement locus set as a movement locus of the stationary object in a case where there is no angular error.

A side lobe blocking method for blocking side lobe signals in a side lobe blocking apparatus may be provided. The side lobe blocking method includes setting a sum channel and a plurality of different difference channels using a plurality of receiving beams and a main beam in which a target exists among the plurality of receiving beams; calculating a plurality of different monopulse ratios using ratios between each of the plurality of different difference channels and the sum channel; determining whether a main beam target is received in a main lobe based on each of the plurality of different monopulse ratios; and finally detecting whether the main beam target is received in the main lobe based on results determined based on each of the plurality of different monopulse ratios.

The embodiments relate to a radar control device and method. Specifically, a radar control device according to the embodiments may include an antenna device comprising a non-uniform linear array (NLA) antennas spaced apart according to a predetermined ratio, a first uniform linear array (ULA) antenna generated by being spaced apart by a first interval based on the NLA antenna, and a second ULA antenna generated by being spaced apart by a second interval based on the NLA antenna, a transceiver configured to transmit a transmission signal through the antenna device and receive a reflection signal reflected from an object, and a controller configured to determine an angular power spectrum (APS) for the reflection signal and determine an angle at which the object is located based on the APS.

In various example, embodiments are directed to angle bias error identification and correction for autonomous and semi-autonomous systems and applications. Systems and methods are disclosed that identify angle bias error(s) associated with detected sensor data and correct for such angle bias error(s) for use in localization, navigation, and/or other uses by autonomous vehicles, semi-autonomous vehicles, robots, and/or other object or machine types. In embodiments, angle bias error identification is performed by detecting angle error in association with various points detected via a sensor during normal driving operation of an ego-machine. The detected angle errors may be used to generate a representation of angle bias error for various angles of the sensor, which may be used to apply a correction to raw angle measurements. Using techniques described herein, for example, corrected azimuth angle measurements may be generated for use by downstream modules to perform more efficient and effective navigation.

The embodiments relate to a radar control device and method. Specifically, a radar control device according to the embodiments may include an antenna device comprising a nonuniform linear array (NLA) antennas spaced apart according to a predetermined ratio, a first uniform linear array (ULA) antenna generated by being spaced apart by a first interval based on the NLA antenna, and a second ULA antenna generated by being spaced apart by a second interval based on the NLA antenna, a transceiver configured to transmit a transmission signal through the antenna device and receive a reflection signal reflected from an object, and a controller configured to determine an angular power spectrum (APS) for the reflection signal and determine an angle at which the object is located based on the APS.

An information processing apparatus includes a data acquisition unit that acquires irradiation direction displacement data that indicates a displacement amount in an irradiation direction of an object, the displacement amount being generated by irradiation of the object with a radio wave from a flying object, a displacement amount estimation unit that estimates a displacement amount of the object in a first direction under a physical constraint condition on the object, a residual error calculation unit that calculates a residual error by subtracting a value obtained by projecting the estimated displacement amount in the first direction in the irradiation direction from the displacement amount indicated by the irradiation direction displacement data, and a residual error conversion unit that projects the calculated residual error in a second direction, thereby converting the residual error into a displacement amount of the object in the second direction.