Abstract: A vehicle radar system including at least one transceiver arrangement (52) that is arranged to generate and transmit a least one FMCW chirp signal (4a, 4b). Each chirp signal (4a, 4b) includes a corresponding plurality of frequency ramps (r1, r2). The vehicle radar system (3) is arranged to receive reflected signals (5a, 5b) and to mix the received signals (5a, 5b) with the respective transmitted chirp signal (4a, 4b) to obtain at least one IF signal (14). The vehicle radar system (3) is further arranged to produce a periodically updated dwell list (34), and to collect and process data in dependence of the present dwell list (34). The present dwell list includes information where the probability of presence of objects exceeds a certain threshold.

Abstract: A method of mitigates RF interference from an RF interferer. An RF signal is received at an RF transceiver during a time period. The RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature. The received RF signal is analyzed in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern. Transmission of the RF signals from the RF transceiver are synchronized with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal.

Abstract: An interference detection methods and receivers for receiving an RF signal including a desired RF signal and an intermittent interference signal, estimating thermal noise of the receiver by statistically analyzing a plurality of time intervals of data of the received RF signal, including at least one data interval not including the interferer, estimating an intermittent-interference-plus-noise level by statistically analyzing an extended time interval of the data, determining an interference metric based on a ratio of the estimates, and evaluating the interference metric against one or more thresholds to detect the presence or absence of degrading RF interference. The statistical analysis may include application of order statistic filtering.

Abstract: A radar signal transmitter transmits first and second radar signals at different first and second frequencies. A radar receiver receives reflected radar signals and generates receive signals indicative of the reflected radar signals. A first receive signal is indicative of a first reflected radar signal generated by reflection of the first transmitted radar signal, and a second receive signal is indicative of a second reflected radar signal generated by reflection of the second transmitted radar signal. A processor receives the first and second receive signals and computes a difference between the first and second receive signals to generate a difference signal. The processor processes the difference signal to provide radar information for the region, the processor adjusting at least one of amplitude and phase of at least one of the first and second receive signals such that the difference is optimized at a preselected range from the receiver.

Abstract: The systems and methods of the present disclosure utilize an advantageous data transmission protocol, which facilitates determining and compensating for transmission delay between nodes in a communications network in order to correlate timing information across multiple nodes. According to the systems and methods presented herein, data may be transmitted from a first node to a second node, wherein the transmitted data includes each of (i) timing information (as measured by a first timing mechanism associated with the first node) characterizing a first set of data and (ii) a transmission time (as also measured by the first timing mechanism). A receiving time (as measured by a second timing mechanism associated with the second node) for the first set of data, may also be determined. Based on these parameters timing information characterizing the first set of data in the context of the second timing mechanism may then be determined.

Abstract: A method of mitigates RF interference from an RF interferer. An RF signal is received at an RF transceiver during a time period. The RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature. The received RF signal is analyzed in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern. Transmission of the RF signals from the RF transceiver are synchronized with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal.

Abstract: An interference detection methods and receivers for receiving an RF signal including a desired RF signal and an intermittent interference signal, estimating thermal noise of the receiver by statistically analyzing a plurality of time intervals of data of the received RF signal, including at least one data interval not including the interferer, estimating an intermittent-interference-plus-noise level by statistically analyzing an extended time interval of the data, determining an interference metric based on a ratio of the estimates, and evaluating the interference metric against one or more thresholds to detect the presence or absence of degrading RF interference. The statistical analysis may include application of order statistic filtering.

Abstract: The systems and methods of the present disclosure utilize an advantageous data transmission protocol, which facilitates determining and compensating for transmission delay between nodes in a communications network in order to correlate timing information across multiple nodes. According to the systems and methods presented herein, data may be transmitted from a first node to a second node, wherein the transmitted data includes each of (i) timing information (as measured by a first timing mechanism associated with the first node) characterizing a first set of data and (ii) a transmission time (as also measured by the first timing mechanism). A receiving time (as measured by a second timing mechanism associated with the second node) for the first set of data, may also be determined. Based on these parameters timing information characterizing the first set of data in the context of the second timing mechanism may then be determined.

Abstract: A vehicle radar system including at least one transceiver arrangement (52) that is arranged to generate and transmit a least one FMCW chirp signal (4a, 4b). Each chirp signal (4a, 4b) includes a corresponding plurality of frequency ramps (r1, r2). The vehicle radar system (3) is arranged to receive reflected signals (5a, 5b) and to mix the received signals (5a, 5b) with the respective transmitted chirp signal (4a, 4b) to obtain at least one IF signal (14). The vehicle radar system (3) is further arranged to produce a periodically updated dwell list (34), and to collect and process data in dependence of the present dwell list (34). The present dwell list includes information where the probability of presence of objects exceeds a certain threshold.

Abstract: A radar signal transmitter transmits first and second radar signals at different first and second frequencies. A radar receiver receives reflected radar signals and generates receive signals indicative of the reflected radar signals. A first receive signal is indicative of a first reflected radar signal generated by reflection of the first transmitted radar signal, and a second receive signal is indicative of a second reflected radar signal generated by reflection of the second transmitted radar signal. A processor receives the first and second receive signals and computes a difference between the first and second receive signals to generate a difference signal. The processor processes the difference signal to provide radar information for the region, the processor adjusting at least one of amplitude and phase of at least one of the first and second receive signals such that the difference is optimized at a preselected range from the receiver.

Abstract: A radar system and method include a first transmitted radar signal having a first frequency and a second transmitted radar signal having a second frequency different from the first frequency. A receiver receives reflected radar signals generated by reflection of the transmitted radar signals and generates receive signals indicative of the reflected radar signals, a first receive signal being indicative of a first reflected radar signal generated by reflection of the first transmitted radar signal, and a second receive signal being indicative of a second reflected radar signal generated by reflection of the second transmitted radar signal. A processor receives the first and second receive signals and computes a difference between the first and second receive signals to generate a difference signal, the processor processing the difference signal to provide radar information.

Abstract: A process of determining target parameters of an object within a field of detection of an automotive radar system, the process comprising the steps of: (a) establishing a target range from a sequence of ranges; (b) dwelling on the target range for an initial dwell time to obtain sensor data; (c) determining if the sensor data corresponds to the presence of an object or to the absence of an object at the target range based on probability density distributions of an object being present and being absent at the target range, and if such the determination cannot be made, then repeating steps (b)-(c) until the determination can be made; (d) if the sensor data is determined to correspond to the presence of an object in step (c), then dwelling at the target range for an extended dwell time to obtain additional sensor data for determining the target parameters of the object before proceeding to step (e); and (e) establishing the next of the sequence of ranges as the target range before reiterating steps (b)-(e).

Abstract: A process of determining an imminent-collision between a vehicle and an object, said vehicle having a sensing system for obtaining one or more images representing at least one observed object within a field of detection, said process comprising: (a) obtaining one or more images representing an observed object within said field of detection; and (b) determining that a collision between said vehicle and said observed object is imminent when the ratio of the probability that said observed object is actually within a collision zone to the probability that said observed object is actually within a safe zone is greater than a certain value.