Abstract: A method for processing a sequence of images is provided. The method receives a sequence of images. Each image includes a plurality of pixels. The pixels include radial velocity information. The method compresses the sequence of images based on the radial velocity information. The method stores the compressed sequence of images in a storage device.

Abstract: A system and method are provided for processing echo signals reflected from one of more targets in a radar field-of-view. The method includes receiving echo signals reflected from one or more targets in the radar field-of-view in response to a sequence of transmit pulses; generating a received signal vector containing samples from the received echo signals; and applying the received signal vector to a set of filters configured to calculate a Doppler spectrum for a set of Doppler frequencies to which each filter is tuned, wherein an integration processing time for each filter varies relative to the Doppler frequency of each filter.

Abstract: A method of performing ranging and detection with an array lidar system and the array lidar system include a first illuminator to transmit a first pseudorandom binary sequence of pulses, the first pseudorandom sequence of pulses resulting in first reflections, and a second illuminator to transmit a second pseudorandom sequence of pulses, the second pseudorandom sequence of pulses being transmitted at least partly concurrently with transmission of the first pseudorandom sequence of pulses, the second pseudorandom sequence of pulses resulting in second reflections. A receiver receives the first reflections and the second reflections and associates the first reflections with the first illuminator based on a result of correlating the first reflections with the first pseudorandom sequence of pulses and a result of correlating the first reflections with the second pseudorandom sequence of pulses, the receiver includes an optical detector array and a processor.

Abstract: In an embodiment, a method for processing an image is provided. The method receives an image including a plurality of pixels. Each pixel includes radial velocity information. The method categorizes the plurality of pixels of the image into a plurality of groups of pixels based on radial velocity information of the pixels. The method associates at least one of the groups of pixels with an object.

Abstract: A system and method to resolve angle of arrival (AOA) ambiguity in a radar system include receiving received reflections at a plurality of transceiver nodes. Each transceiver node among the plurality of transceiver nodes of the radar system receives one or more of the received reflections at respective one or more receive elements. The method includes determining candidate AOAs {circumflex over (?)}i based on phases differences in the received reflections at the plurality of transceiver nodes, and determining Doppler frequencies fdi based on the received reflections. An estimated AOA {circumflex over (?)} is selected from among the candidate AOAs {circumflex over (?)}i based on matching metrics ?i between the Doppler frequencies and the candidate AOAs {circumflex over (?)}i.

Abstract: A method and system to determine angle of arrival of a target include one or more transmitters, one or more receivers, and one local oscillator to provide a local reference signal each in two or more transceiver nodes. The system also includes a controller to determine obtained phase differences for each of the two or more transceiver nodes. Each of the obtained phase differences is between a signal transmitted by one of the one or more transmitters and received by one of the one or more receivers of a same one of the two or more transceiver nodes. The controller estimates the angle of arrival of the target based on the obtained phase differences determined for the two or more transceiver nodes.

Abstract: A vehicle, a radar system for the vehicle, and method of driving the vehicle. A radar array having plurality of radar nodes is arranged along the vehicle. Each radar node includes a first transmitter at one end of the node, a second transmitter at a second end of the node and a plurality of receivers aligned between the first transmitter and the second transmitter. At least one of an aperture length of the nodes and a spacing between the nodes is a variable parameter. A processor activates a transmitter of the radar array to generate a test pulse, receive, at a receiver of the radar array, a reflection of the test pulse from an object, and determines an angular location of the object from the reflection of the test pulse. A trajectory of the vehicle can be changed using the determined angular location of the object.

Abstract: A system and method to separate close targets includes transmitting a pulse sequence and detecting a first target at a first target Doppler frequency based on processed received reflections resulting from the pulse sequence. A nulling pulse sequence designed to null the processed received reflections at the target Doppler frequency is transmitted.

Abstract: A vehicle, radar system of the vehicle and method of operating a radar system. The radar system includes a first sensor that generates a first chirp signal; a second sensor for generating a second chirp signal and which received reflected signals. One of the first sensor and second sensor receives a signal that includes a first reflected signal related to the first chirp signal and a second reflected signal related to the second chirp signal. A processor multiplies the received signal by one of the first chirp signal and the second chirp signal to obtain a desired signal indicative of one of the first reflected signal and the second reflected signal and an interference signal indicative of the other of the first reflected signal and the second reflected signal, and applies a filter to the mixed signal to separate the interference signal from the desired signal.

Abstract: An automotive radar system includes a radar camera that captures a sequence of frames of radar images of a field of view of the radar. A boundary detector receives the radar data from the radar camera and detects object boundary data in the radar data. An image processor receives the radar data and the object boundary data and performs image analysis including image deblurring and generating response control signals based at least in part on the radar data and the object boundary data. Response equipment implements one or more response actions based on the response control signals. Object boundary detection includes performing pixel-level Doppler analysis to associate pixel velocities to pixels of the radar data and identifying discontinuities in the pixel velocities. Response equipment may include, for example, one or more of a navigation display, collision avoidance warning, automatic cruise control, automatic braking, and automatic steering.

Abstract: A method for transmit beamforming in a MIMO antenna for a radar system having N transmit antennas includes acquiring a coding matrix defining a desired field-of-view, generating a transmit signal matrix based on a singular value decomposition (SVD) of the coding matrix, wherein the columns of the transmit signal matrix are transmit signal vectors formed from the singular vectors corresponding to the maximal singular values of the coding matrix based on the SVD, the transmit signal vectors defining spatial codewords, and transmitting signals in sequences over the N transmit antennas according to the transmit signal matrix, the sequences correspond to the spatial codewords from the transmit signal vectors, wherein each sequence is defined by a number of spatial codewords transmitted in a single repetition sequence interval, and wherein transmitting the spatial codewords according to the transmit signal matrix enables beamforming of the transmitted signals to the desired field-of-view.

Abstract: The present application generally relates communications and hazard avoidance within a monitored driving environment. More specifically, the application teaches a system and method for improved target object detection in a vehicle equipped with a laser detection and ranging LIDAR system by transmitting a light pulse for a known duration and comparing a duration of the received pulse to the transmitted pulse in order to determine an orientation of a surface of a target.

Abstract: An array lidar system on a platform and a method of operating an array lidar system comprising a plurality of illuminators on a platform include controlling a first set of the plurality of illuminators to transmit for a first duration, and controlling a second set of the plurality of illuminators to transmit for a second duration. The method also includes receiving and processing reflections resulting from the first set of the plurality of illuminators and the second set of the plurality of illuminators.

Abstract: An array lidar system and a method of assembling an array lidar system comprising a plurality of illuminators and a plurality of detectors includes designing a plurality of hexagons of a same size such that no gaps remain between adjacent ones of the plurality of hexagons, and designing an arrangement of the plurality of illuminators or the plurality of detectors according to a hexagonal construct, the designing including arranging one or more illuminators of the plurality of illuminators or one or more detectors of the plurality of detectors within respective ones of the plurality of hexagons, wherein the one or more illuminators or the one or more detectors is at a same position within each of the respective ones of the plurality of hexagons. Implementing the design is done by disposing the plurality of illuminators or the plurality of detectors according to the arrangement.

Abstract: The present application generally relates communications and hazard avoidance within a monitored driving environment. More specifically, the application teaches a system and method for improved target object detection in a vehicle equipped with a laser detection and ranging LIDAR system by employing a variable LIDAR pulse rate.

Abstract: A detection system to detect an object and a method of performing detection of an object are described. The system includes a radar system to transmit radiation and receive resulting reflections, the object being a distributed radar target reflecting multi-point reflections. The system also includes an auxiliary sensor to estimate one or more parameters of the object, and a processor to estimate a probability density function based on estimates of the one or more parameters of the object and the multi-point reflections and to detect the object based on the probability density function.

Abstract: In an embodiment, a method for processing a sequence of images is provided. The method receives a sequence of images generated by a radar. Each image includes a plurality of pixels. Each pixel includes radial velocity information. The method estimates optical flow for the pixels within an image in the sequence of images by using the radial velocity information for the pixels as a constraint.

Abstract: A target detection system and a method of performing radar target detection are described. The system includes a radar system to obtain radar echoes from a target with multiple point reflectors. The system also includes a processor to obtain a cluster of multi-dimensional point spread function from the radar echoes, each multi-dimensional point spread function being associated with a reflection from one of the multiple point reflectors, and also to perform object detection based on three or more dimensions of each of the multi-dimensional point spread functions of the cluster.

Abstract: A multiple input multiple output (MIMO) antenna for a radar system includes a plurality of transmitter antennas forming a planar transmitter antenna array, wherein the plurality of transmitter antennas are configured to emit orthogonal waveforms, and a plurality of receiver antennas forming at least two receiver antenna arrays, wherein along a first axis an interelement spacing between the plurality of receiver antennas in each receiver antenna array is dense relative to an interelement spacing between the plurality of transmitter antennas; and along a second axis the interelement spacing between the plurality of transmitter antennas is dense relative to the interelement spacing between the plurality of receiver antennas.

Abstract: A multiple input multiple output (MIMO) antenna for a radar system, the antenna for at least one first module having a plurality of antenna elements forming a linear array, wherein the plurality of antenna elements in the linear array are uniformly separated by a first distance; and for at least one second module having a plurality of antenna elements forming a planar array, wherein the plurality of antenna elements in the planar array are uniformly separated by a second distance; and wherein the at least one first module and the at least one second module are selectively configured to function as transmitter modules or receiver modules, and wherein an interleaving between the plurality of antenna elements in the linear array of the at least one first module with the plurality of antenna elements in the planar array of the at least one second module produces a uniform virtual antenna array.