Abstract: A radar apparatus having a local oscillator which generates a local oscillator signal having a constant frequency. The radar apparatus also includes at least one device which transmits radar signals and/or receives radar signals. The device has a ramp generator which, depending on the local oscillator signal, generates a ramp signal and distributes the signal within the device.

Abstract: A radar apparatus. The radar apparatus includes: a local oscillator configured to generate a continuous wave or modulated continuous wave local oscillator signal; a test signal generator configured to generate a test signal and modulate it onto a signal derived from the local oscillator signal to generate a feedback signal; a transmitting device configured to emit a radar signal based on the local oscillator signal; a receiver device that is configured to receive the reflected radar signal, generate a receive signal, and feed back the feedback signal with the receive signal to generate an output signal; and an evaluation device configured to ascertain at least one characteristic value of the radar apparatus using the output signal. A frequency range of the test signal lies outside a frequency range intended for applications of the radar apparatus.

Abstract: A radar device. The radar device includes a printed circuit board; a signal generation circuit, which is arranged at least indirectly on the printed circuit board, is electrically coupled to the printed circuit board and is designed to generate a radar signal; a waveguide antenna device, which is arranged at least indirectly on the printed circuit board; and a waveguide coupling device, wherein the signal generation circuit is arranged on or in the waveguide coupling device, and wherein the waveguide coupling device is designed to couple the radar signal generated by the signal generation circuit, into the waveguide antenna device.

Abstract: A MIMO radar system.

Abstract: A MIMO radar system including a transmitter array, and a receiver array, the antenna distances in one of the transmitter and receiver arrays being above the Nyquist limit for unambiguous angle measurements, but the antenna distances in the combination of the transmitter and receiver arrays being below this Nyquist limit. The system also includes a control and evaluation unit.

Abstract: A MIMO radar system. The system includes a transmitter array, a receiver array, the antenna distances in one of the transmitter and receiver arrays being below the Nyquist limit for unambiguous angle measurements, but the antenna distances in the combination of the transmitter and receiver arrays being above this Nyquist limit. The system further includes a control and evaluation unit, which is designed to transmit via the transmitter array a sequence of transmit signals, which are subdivided into multiple measuring blocks, in each of multiple repeatedly implemented measuring cycles, a uniform multiplex scheme being applied within each measuring block and the multiplex schemes varying from measuring block to measuring block, carry out a Doppler estimation and an angle estimation based on the receiver array, carry out a Doppler correction of the received signals based on the Doppler estimations, demultiplex the Doppler-corrected signals, and refine the Doppler estimations and angle estimations.

Abstract: A method for a MIMO radar system includes encoding signals that are transmitted from different transmitting antennas according to code blocks; determining for a radar object a Doppler estimation that has a periodic ambiguity; and resolving the periodic ambiguity, where the resolving includes, for each of multiple ambiguity hypotheses of the Doppler shift: compensating for the Doppler shift according to the respective ambiguity hypothesis, and decoding for separating signal components associated with the transmitting antennas. An ambiguity hypothesis that is applicable to the radar object is selected based on quality criteria for the decoding for the particular ambiguity hypotheses, and an unambiguous speed estimation of the radar object is determined corresponding to the Doppler estimation and the selected ambiguity hypothesis. The quality of an angle estimation based on the signal components can be determined as a quality criterion for the decoding.

Abstract: A MIMO radar system. The system includes a transmitter array, a receiver array, the antenna distances in one of the transmitter and receiver arrays being below the Nyquist limit for unambiguous angle measurements, but the antenna distances in the combination of the transmitter and receiver arrays being above this Nyquist limit. The system further includes a control and evaluation unit, which is designed to transmit via the transmitter array a sequence of transmit signals, which are subdivided into multiple measuring blocks, in each of multiple repeatedly implemented measuring cycles, a uniform multiplex scheme being applied within each measuring block and the multiplex schemes varying from measuring block to measuring block, carry out a Doppler estimation and an angle estimation based on the receiver array, carry out a Doppler correction of the received signals based on the Doppler estimations, demultiplex the Doppler-corrected signals, and refine the Doppler estimations and angle estimations.

Abstract: A MIMO radar system.

Abstract: A MIMO radar system including a transmitter array, and a receiver array, the antenna distances in one of the transmitter and receiver arrays being above the Nyquist limit for unambiguous angle measurements, but the antenna distances in the combination of the transmitter and receiver arrays being below this Nyquist limit. The system also includes a control and evaluation unit.

Abstract: A method for a MIMO radar system includes encoding signals that are transmitted from different transmitting antennas according to code blocks; determining for a radar object a Doppler estimation that has a periodic ambiguity; and resolving the periodic ambiguity, where the resolving includes, for each of multiple ambiguity hypotheses of the Doppler shift: compensating for the Doppler shift according to the respective ambiguity hypothesis, and decoding for separating signal components associated with the transmitting antennas. An ambiguity hypothesis that is applicable to the radar object is selected based on quality criteria for the decoding for the particular ambiguity hypotheses, and an unambiguous speed estimation of the radar object is determined corresponding to the Doppler estimation and the selected ambiguity hypothesis. The quality of an angle estimation based on the signal components can be determined as a quality criterion for the decoding.