Abstract: Various technologies described herein pertain to disambiguating velocity estimate data of a radar sensor system. First range estimate data can be computed based on samples from a period of a ramp for each ramp in a sequence. First velocity estimate data can be computed based on samples from a range bin across the ramps in the sequence for each range bin. For each of the ramps in the sequence, samples from a period of a ramp can be divided into a plurality of groups of the samples respectively from periods of subramps. The first velocity estimate data can be disambiguated to generate second velocity estimate data. The first velocity estimate data can be disambiguated based on the plurality of groups of the samples respectively from the periods of the subramps.

Abstract: A radar system comprises transmit antennas configured to transmit a radar signal and receive antennas that receive a radar return. The radar system further comprises circuitry configured to perform acts, the acts comprising generating a phase-shifted radar signal using a unique phase code that is commonly assigned to all transmitters included in the radar system. The acts further comprise transmitting the phase-shifted radar signal from transmit antennas and receiving a radar return at receive antennas. Additionally, the acts comprise, during signal processing, performing phase compensation by multiplying a radar signal received in the radar return by a phase compensation value that is commonly assigned to all receivers included in the radar system in order to remove the phase shift. The acts also comprise outputting an un-shifted processed radar signal.

Abstract: A radar sensor system comprises a first radar sensor and at least a second radar sensor and one or more processors configured to assign different pulse rate intervals (PRI) to the first radar sensor and the second radar sensor. The processor(s) s are further configured to: receive ambiguous velocity estimates from the first and second radar sensors, respectively; determine maximum detectable velocity (Vmax) values for the first and second radar sensors based on their respective PRIs; generate a first velocity vector for the first radar sensor based on the first Vmax and the first ambiguous velocity estimate; generate a second velocity vector for the second radar sensor based on the second Vmax and the second ambiguous velocity estimate; compare velocity values in the first and second velocity vectors; and identify and output a velocity value common to the first and second velocity vectors as a correct unambiguous velocity of the object.

Abstract: Various technologies described herein pertain to systems and methods for increasing radar resolution by, for example, combining radar information. In one embodiment, beamforming is performed using radar units that are individually coherent but collectively do not need to be coherent. Each radar transmits and receives its own signal to process and generate target information including beamforming information and/or virtual receiver channel information. The target information from each radar is then merged or summed into a combined beamforming based on all the target information received from all the radar units. When the radar units used in this manner are separated by a distance, the resulting beamforming information is representative of an aperture/resolution based on the total space or distance between the radar units. Thus, having an improved resolution, benefits such as improved target resolution (e.g., size, position, and detection) can be achieved.

Abstract: A radar system comprises a plurality of receive antennas that receive a radar signal. One or more processors are configured to perform acts selecting one or more training cells for noise power estimation based upon a radar signal received at one or more receive antennas. The acts further comprise calculating a mean noise power value for the one or more training cells and calculating a noise power variance for the one or more training cells. The acts also comprise estimating a probability of false alarm (PFA) threshold to be applied for a non-training cell and estimating a PFA threshold offset based on the noise power variance. The acts further comprise adjusting a current PFA threshold offset based on the estimated PFA threshold offset.

Abstract: A radar system comprises a plurality of transmit antennas that transmit a radar signal toward a target, wherein respective transmit antennas are assigned a transmitter-specific phase offset via which the radar signal is modulated, and wherein respective phase offsets correspond to an offset in velocity of a target. The system further comprises a plurality of receive antennas that receive comprising transmitted signals reflected by the target, and one or more processors configured to determine whether a peak signal is present for respective transmitted signals reflected by the target, the peak signals corresponding to perceived velocities at which the target is moving.

Abstract: Various technologies described herein pertain to disambiguating velocity estimate data of a radar sensor system. First range estimate data can be computed based on samples from a period of a ramp for each ramp in a sequence. First velocity estimate data can be computed based on samples from a range bin across the ramps in the sequence for each range bin. For each of the ramps in the sequence, samples from a period of a ramp can be divided into a plurality of groups of the samples respectively from periods of subramps. The first velocity estimate data can be disambiguated to generate second velocity estimate data. The first velocity estimate data can be disambiguated based on the plurality of groups of the samples respectively from the periods of the subramps.