A phase modulated continuous wave (PMCW) multiple input multiple output (MEM) radar system is described herein. The radar system is configured to compute range, velocity, and direction of arrival angle of objects relative to the radar system. The radar system includes several transmitting antennas and several receiving antennas, where selected transmitting antennas simultaneously transmit radar signals based on the same modulation signal. Per transmitting antenna, the transmissions are modulated with respective phase offsets on a per pulse repetition interval (PRI) basis. Hence, a coupling between phase shifts over PRI and transmitter positions is established. Effectively, then, each transmitting antenna is labeled with a velocity offset that corresponds to the phase rate of change assigned to the transmitting antenna. This approach is referred to herein as velocity-labeled multiplexing (VLM).

A method of operating a radar sensor system that is configured to determine range and velocity information from radar waves reflected by a scene in an interior of a vehicle for vital sign detection. The method includes steps to decompose reflected and received signals into range and velocity information, to measure the movement over time in specified range gates and to evaluate the similarities between them. Based on the characteristics of similar behaving range bins, it can be decided whether any detected movement is related to an internal or external disturbance or by vital signs.

The invention relates to a method for determining at least one piece of object information about at least one object sensed by means of a radar system and to a radar system. According to the method, transmission signals in the form of chirps are transmitted by at least three transmitters in each case in chirp sequences in a monitoring region of the radar system. Echoes of the transmission signals reflected at the at least one object are received as reception signals by means of at least one receiver and, if necessary, are brought into a form that can be used by an electronic control and/or evaluation device. The reception signals are subjected to at least one two-dimensional discrete Fourier transformation. At least one target signal (ZS1_a, ZS2_a, ZS3_a, ZS4_a, ZS1_b, ZS2_b, ZS3_b, ZS4_b) is determined from the outcome of the at least one two-dimensional discrete Fourier transformation. At least one piece of object information is determined from the at least one target signal (ZS1_a, ZS2_a, ZS3_a, ZS4_a, ZS1_b, ZS2_b, ZS3_b, ZS4_b). On the transmitter side, at least one first transmission signal and at least two other transmission signals are generated from a frequency-modulated continuous wave signal and simultaneously transmitted into the monitoring region of the radar system by means of a separate transmitter in each case. The at least two other transmission signals are each encoded by means of a phase modulation in relation to the at least one first transmission signal. The respective phase positions of the at least two other transmission signals are each incremented or decremented from one chirp to the next by a constant phase shift amount. Different phase shift amounts are used for the at least two other transmission signals. The respective phase shift amounts for the at least two other transmission signals are specified such that for at least three of the transmission signals, including the at least one first transmission signal, the differences in amount between the phase shift amounts of two of the at least three transmission signals are different.

Systems and methods are provided for adapting automotive mmW radar technology to meet the requirements of autonomous unmanned aerial vehicle (UAV) systems. Embodiments of the present disclosure provide solutions for several design challenges from this adaptation, such as utilizing a limited number of antenna channels to scan in both azimuth and elevation.

A radar hardware accelerator (HWA) includes a fast Fourier transform (FFT) engine including a pre-processing block for providing interference mitigation and/or multiplying a radar data sample stream received from ADC buffers within a split accelerator local memory that also includes output buffers by a pre-programmed complex scalar or a specified sample from an internal look-up table (LUT) to generate pre-processed samples. A windowing plus FFT block (windowed FFT block) is for multiply the pre-processed samples by a window vector and then processing by an FFT block for performing a FFT to generate Fourier transformed samples. A post-processing block is for computing a magnitude of the Fourier transformed samples and performing a data compression operation for generating post-processed radar data. The pre-processing block, windowed FFT block and post-processing block are connected in one streaming series data path.

A method and an apparatus for recognizing an absorptive radome coating on an apparatus for emitting electromagnetic radiation and receiving partial radiation reflected at objects is disclosed. The radome covers at least one antenna of the apparatus. A mixer mixes a frequency-modulated transmission signal with the signal received by the at least one antenna, the mixed product of the mixer is subjected to analog-to-digital conversion, the digitized signal is transformed into a two-dimensional spectrum, and the two-dimensional spectrum is mapped with a transfer function. The two-dimensional spectrum that was mapped with the transfer function is correlated with correlation matrices in order to carry out pattern recognition.

A method for determining angle information about a direction of a target object in a radar system for a vehicle, wherein the following steps are performed: providing a first item of sensing information for a first modulation mode of the radar system, providing at least one second item of sensing information for at least a second modulation mode of the radar system, and combining the sensing information for the different modulation modes in order to perform the determination of the angle information on the basis of the combined sensing information.

A fast ramp frequency modulated continuous wave (FMCW) radar system (100) is described herein, where the fast ramp FMCW radar system is configured to employ velocity labeled multiplexing (VLM) in connection with generating detections for objects in a scene. Transmitters (110, 112) in the radar system are assigned different velocity labels that corresponds to different phase rates of change of consecutive chirps in signals emitted by the transmitters. Approaches for generating detections based upon echo signals that correspond to the emitted signals are also described herein.

One embodiment of the disclosure relates to a vehicle radar device and a method for controlling the same. According to the present embodiments, a vehicle radar device may comprise an antenna unit including Nt transmission antennas and Nr reception antennas, wherein Nt is a natural number equal to or larger than 1, and Nr is a natural number equal to or larger than 2, a transceiver controlling the transmission antenna to transmit a transmission signal and the reception antenna to receive a reception signal reflected by a target, a signal processor detecting one or more peak signals for the target and separately detecting Nt*Nr channel reception signals corresponding to each peak signal, a target angle estimator calculating a target angle estimate from k channel reception signals selected from among the Nt*Nr channel reception signals, and a target size information estimator calculating size information about the target based on up to .sub.NV*NrCk target angle estimates calculated by the target angle estimator.

A display device is provided. The display device includes a transparent substrate, a display, an antenna module, and a plurality of first conductive structures. The display emits image light to the transparent substrate. The antenna module emits a first beam to the transparent substrate. The plurality of first conductive structures is disposed on a first surface of the transparent substrate and a travel path of the image light, and forms a first conductive pattern. The plurality of first conductive structures change a direction of the first beam and generate a second beam to an object.