An apparatus for correcting an error of a radar sensor for a vehicle and a method thereof can correct a target measurement error of the radar sensor installed inside a bumper of the vehicle based on target information obtained from a camera image. The apparatus includes: a radar sensor that is installed inside a bumper of the vehicle to detect a target, a camera that photographs a surrounding image of the vehicle, and a controller that corrects a target detection error of the radar sensor based on target information obtained from an image photographed by the camera.

A conventional millimeter wave radar cannot detect a failure when there is not satisfied the condition that a road exists in front of a vehicle or that in two or more radar apparatuses, a leakage electric wave from another radar can be detected. A failure detection apparatus according to the present disclosure calculates reception power values from a reception processing signal for each antenna and compares the reception power value with a reference power value determined by a reference power calculation unit so as to perform a failure determination. There is provided a failure determination unit that compares the reference power value for a failure determination with the power value obtained from a reception processing signal outputted from each of receivers so as to perform a failure determination for each of the receivers.

Radar System The disclosure relates to a radar system having multiple radar transceiver modules, in which each module has a clock signal that is synchronised with a clock signal generated by a leader transceiver module. Example embodiments include a radar system (400) comprising a plurality of radar transceiver modules (401, 402) mounted to a common PCB (404), the plurality of radar transceiver modules comprising a leader module (401) and one or more follower modules (402), the leader module (401) comprising a first oscillator (403) configured to provide a first clock signal at a first frequency to each follower module (402), each of the leader and follower modules comprising a phase locked loop, PLL, clock signal generator (300), the PLL clock signal generator (300) comprising a divide by n clock divider (304) arranged to output 2n phase shifted clock signals (314) at a third frequency and a multiplexer (306) connected to receive the 2n phase shifted clock signals from the divide by n clock divider (304) and output a third clock signal (308) selected by an input phase select signal (307).

A method includes generating emitted signals using transmitter elements and measuring received signals using receiver elements. The received signals are reflected portions of the emitted signals and the received signals correspond to one or more targets. The method also includes applying a first matched filter to the received signals to determine range information for the received signals, filtering the received signals based on the range information to define filtered signals, and determining calibration parameters using the filtered signals. The method also includes correcting the received signals using the calibration parameters to define calibrated signals and determining angle of arrival information for the received signals using the calibrated signals.

A method for calibrating two receiving units of a radar sensor that includes an array of receiving antennas formed by two sub-arrays and an evaluation unit, which is designed to carry out an angle estimation for located radar targets based on phase differences between the signals received by the receiving antennas, each receiving unit including parallel reception paths for the signals of the receiving antennas of one of the sub-arrays. The method includes: analyzing the received signals and deciding whether a multi-target scenario or a single-target scenario is present, in the case of a single-target scenario, measuring phases of the signals received in the sub-arrays and calculating a phase offset between the two sub-arrays, and calibrating the phases in the two receiving units based on the calculated offset.

For example, a radar apparatus may include a mismatch calibrator configured to determine antenna mismatch calibration information to calibrate an antenna mismatch of a radar antenna array comprising a plurality of receive (Rx) antennas; and a processor to process radar Rx data, and to generate radar information based on the radar Rx data and the antenna mismatch calibration information, the radar Rx data is based on Rx radar signals received at the plurality of Rx antennas.

A transceiver circuit is disclosed. The transceiver circuit includes an antenna, a receiver RF chain configured to receive a receiver RF signal from the antenna, a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, and a controller configured to access a CFO (carrier frequency offset) estimate, and to, for each of one or more working frequencies: cause the receiver RF chain to receive a receiver RF signal from the antenna at each working frequency, generate I/Q measurement data based at least in part on the received receiver RF signal and the CFO estimate, store the I/Q measurement data, and cause the transmitter RF chain to transmit a transmitter RF signal to the antenna at each working frequency, where the controller is further configured to cause the transmitter RF chain to transmit the I/Q measurement data for each working frequency to the antenna.

An electronic device may include wireless circuitry with a transmit antenna that transmits signals and a receive antenna that receives reflected signals. The wireless circuitry may detect a range between the device and an external object based on the transmitted signals and the reflected signals. When the range exceeds a first threshold, the wireless circuitry may use the transmitted signals and received signals to record background noise. When the range is less than a second threshold value, the wireless circuitry may detect the range based on the reflected signals and the recorded background noise. This may allow the range to be accurately measured within an ultra-short range domain even when the device is placed in different device cases, placed on different surfaces, etc.

An object recognition method includes generating a first frequency domain signal according to a first echo signal, updating at least one parameter of a primary classifier according to the first frequency domain signal and a training target corresponding to the first frequency domain signal, generating a second frequency domain signal according to a second echo signal, and generating object classification data corresponding to the second frequency domain signal according to the second frequency domain signal and the at least one parameter of the primary classifier. The object classification data is associated with presence of a second object.

A system may include ADC circuitry. To test the performance of the ADC circuitry, the system may include ADC testing circuitry coupled to the ADC circuitry. In particular, the ADC testing circuitry may include reference voltage generation circuitry configured to generate reference voltages serving as test voltages for the ADC circuitry. The ADC circuitry may be coupled to a test input for receiving the test voltages via switching circuitry and may be coupled to a main data input for receiving system data via the switching circuitry. Testing may occur during an idling time period of the system and when the switching circuitry couples the test input to the ADC circuitry. Test input voltages corresponding to one or more stages in the ADC circuitry may be provided to the ADC circuitry, and corresponding output values from the ADC circuitry may be compared to an expected value and/or expected threshold values.