Abstract: A non-transitory device-readable medium, which may be embodied in a device, such as a radar receiver, stores instructions that, when executed by processing circuitry, are configured to perform operations to identify a region of interference. An analog signal is generated based on received signals reflected from a target object and an interfering object. The analog signal is converted to an initial time-domain data set. Processing circuitry is configured or instructed to perform a transform operation on the initial time-domain data set to generate a frequency-domain data set, based on which a region of interference may be identified. Subsequent operations may be performed to facilitate identification of the region of interest including thresholding, inverse transforming, subtracting, and/or combining. The processing circuitry may be further configured or instructed to generate repaired time-domain data from which corrupted time-domain samples to remove data associated with the interfering object.

Abstract: An example radar system includes transmit, receive and processing circuitry. In operation, the radar system transmits first and second sets of chirp signals in which each chirp signal of the first set of chirp signals has an induced phase shift, receives reflected signals based on the transmitted first and second sets of chirp signals, and generates respective first and second sets of digital signals. Fourier Transform (FT) operations are performed on the first and second sets of digital signals to generate first and second arrays, respectively. The radar system identifies a first peak in the first array and a second peak in the second array representing an object in a field of view. The first and second peaks are at corresponding positions in the first and second arrays, respectively. The radar system then compares the phases of the first and second peaks to determine an actual phase shift for the induced phase shift.

Abstract: A method for compressing echolocation data is provided. The method includes dividing the echolocation data into a plurality of partitions, and selecting a first partition for processing. The method also includes combining echolocation data from the first partition with echolocation data within a second partition, and combining echolocation data from the first partition with echolocation data within a third partition. The method further includes storing the combined echolocation data for all of the plurality of partitions except for the first partition in a memory.

Abstract: An apparatus comprises processor cores and computer-readable mediums storing machine instructions for the processor cores. When executing the machine instructions, the processor cores obtain received signals for transmitted chirps from a radar sensor circuit. Each transmitted chirp comprises an A chirp segment, a time gap, and a B chirp segment, respectively. The processor cores sample the received signals to obtain sampled data matrices M1(A) for the A chirp segments and M1(B) for the B chirp segments. The processor cores perform a first Fourier transform (FT) on each column of M1(A) and M1(B) to obtain velocity matrices M2(A) and M2(B), respectively. The processor cores apply a phase compensation factor to M2(B) to obtain a phase corrected velocity matrix M2(B?), and concatenate M2(A) and M2(B?) to obtain an aggregate velocity matrix M2(A&B?). The processor cores perform a second FT on each row of M2(A&B?) to obtain a range and velocity matrix M3(A&B?).

Abstract: A radar system is provided that includes a compression component configured to compress blocks of range values to generate compressed blocks of range values, and a radar data memory configured to store compressed blocks of range values generated by the compression component.

Abstract: A radar transceiver includes a phase shifter that is controlled to apply an induced phase shift in a first subset of chirp signals of a frame of chirp signals, which also includes a second subset of chirp signals in which no phase shift is applied. Other circuitry generates digital signals based on received reflected signals, which are based on transmitted signals. Processing circuitry performs a Fast Fourier Transform (FFT) on a first subset of digital signals, corresponding to the first subset of chirp signals, to generate a first range-Doppler array, and performs a FFT on the second subset of digital signals, corresponding to the second subset of chirp signals, to generate a second range-Doppler array; identifies peaks in the first and second range-Doppler arrays to detect an object; and compares a phases of peaks at corresponding positions in the first and second range-Doppler arrays to determine a measured phase shift between the two peaks.

Abstract: Radar systems, radar-implementation methods, and non-transitory processor-readable mediums storing processor-executable instructions for implementing radar chirp generation and processing are provided.

Abstract: The described technology relates to a real-time processing of network packets. An example system relates to reordering messages received at a server over a communication network from distributed clients, in order to, among other things, eliminate or at least substantially reduce the effects of jitter (delay variance) experienced in the network. The reordering of messages may enable the example data processing application to improve the consistency of processing packets in the time order of when the respective packets entered a geographically distributed network.

Abstract: In some examples, a method includes receiving, at a first device, a radar signal transmitted by a second device at a transmission frequency offset from a local oscillator (LO) frequency of the first device by a target offset and reflected off a target. The method also includes determining an intermediate frequency (IF) of the radar signal based on the transmission frequency and the LO frequency. The method also includes determining a parts per million (ppm) offset between the first device and the second device based on the intermediate frequency and the target offset.

Abstract: The disclosure provides a radar apparatus for estimating a range of an obstacle. The radar apparatus includes a local oscillator that generates a first ramp segment and a second ramp segment. The first ramp segment and the second ramp segment each includes a start frequency, a first frequency and a second frequency. The first frequency of the second ramp segment is equal to or greater than the second frequency of the first ramp segment when a slope of the first ramp segment and a slope of the second ramp segment are equal and positive. The first frequency of the second ramp segment is equal to or less than the second frequency of the first ramp segment when the slope of the first ramp segment and the slope of the second ramp segment are equal and negative.

Abstract: An example device includes a memory that includes a first portion and a second portion, memory control circuitry structured to receive a first set of data associated with a first radar chirp, receive a second set of data associated with a second radar chirp, store a first subset of the first set of data in the first portion of the memory, store a first subset of the second set of data in the first portion of the memory adjacent to the first subset of the first set of data, and store a second subset of the first set of data and a second subset of the second set of data in the second portion of the memory.

Abstract: In an example, a method is implemented in a radar system. The method may include transmitting, via transmission channels, a frame of chirps, the chirps transmitted having a programmed frequency offset that is a function of a transmission channel of the transmission channels that is transmitting the frame of chirps, receiving, via a receive channel, a frame of reflected chirps, the reflected chirps comprising the chirps reflected by an object within a field of view of the radar system, and determining a Doppler domain representation of the frame of reflected chirps having a Doppler domain spectrum that includes multiple spectrum bands, the object represented in at least a portion of the spectrum bands based on the reflected chirps, wherein the programmed frequency is configured to cause the Doppler domain spectrum to include a number of spectrum bands greater than the number of transmission channels.

Abstract: A radar system includes a set of transmitters and a processor coupled to the set of transmitters, which includes first, second, third and fourth transmitters. In operation, the processor generates a first chirp of a set of chirps, in which outputs of the first and second transmitters are modulated by a first phase and outputs of the third and fourth transmitters are modulated by a second phase; and generate a second chirp of the set of chirps, in which outputs of the first and fourth transmitters are modulated by the first phase and outputs of the second and third transmitters are modulated by the second phase.

Abstract: A method of operating a frequency modulated continuous wave (FMCW) radar system includes receiving, by at least one processor, digital intermediate frequency (IF) signals from a mixer coupled to a receive antenna. The method also includes computing, by the at least one processor, a motion metric based on the digital IF signals; operating, by the at least one processor, the FMCW radar system in a classification mode, in response to determining that the motion metric is above a threshold; and operating, by the at least one processor, the FMCW radar system in a detection mode, in response to determining that the motion metric is below the threshold for at least a first amount of time. An amount of power consumed by the FMCW radar system in the detection mode is less than an amount of power consumed by the FMCW radar system in the classification mode.

Abstract: A non-transitory computer-readable storage device stores machine instructions. When executed by one or more processors, the machine instructions cause the one or more processors to determine a first inter-chirp time with respect to a first series of chirps; and determine a second inter-chirp time with respect to a second series of chirps, in which the second inter-chirp time is different than the first inter-chirp time and is based on the first inter-chirp time and a chirp dither value. In another implementation, an oscillator receives chirp configuration signals, which contain the inter-chirp times, and generate the first and second series of chirps with the first and second inter-chirp times, respectively. Transmitter circuitry, coupled to the oscillator, transmits each of the first and second series of chirps with the respective inter-chirp time.

Abstract: Certain aspects of the present disclosure provide techniques for time division duplex configuration override. A method that may be performed by a user equipment (UE) includes detecting a period during which a configuration of a first radio access technology (RAT) conflicts with a configuration of a second RAT for a frequency band; and overriding the configuration of the second RAT with the configuration of the first RAT for the period.

Abstract: A frequency modulated continuous wave (FMCW) radar system is provided that includes a receiver configured to generate a digital intermediate frequency (IF) signal, and an interference monitoring component coupled to the receiver to receive the digital IF signal, in which the interference monitoring component is configured to monitor at least one sub-band in the digital IF signal for interference, in which the at least one sub-band does not include a radar signal.

Abstract: A radar system may include a radar sensor circuit, a compression estimation circuit, a compression circuit, and a data storage circuit. The radar sensor circuit may receive a set of sensor data associated with a radar chirp signal. The radar sensor circuit may generate a set of range data associated with the set of sensor data, which may include first range data for a first range bin and second range data for a second range bin. The compression estimation circuit may determine a first compression ratio for the first range data and a second compression ratio for the second range data. The compression circuit may compress the first and second range data based on the first and second compression ratios respectively. The compressed first and second range data may be stored at the data storage circuit.

Abstract: A radar system applies various angle correction processes with varying levels of computational overhead to reduce errors in angle estimation when processing received return signals. The various angle correction processes aim to overcome systematic errors affected by range migration through correction based on simulation or hardware measurements, through non-iterative refinement, iterative refinement, and/or a combination of correction and iterative refinement.

Abstract: Systems, methods and computer readable mediums are provided for processing radar data to improve detection of weaker targets in the presence of stronger targets. One such system comprises a radar sensor to generate range data based on received radar signals; and a processor that performs a first Doppler Fast Fourier Transform (Doppler-FFT) on the range data to provide a first Doppler-FFT representation, identifies a dominant peak in the first Doppler-FFT representation, determines phase noise associated with the dominant peak, modifies the range data using the determined phase noise to provide modified range data, and performs a second Doppler-FFT on the modified range data to provide a second Doppler-FFT representation. The processor operations may be based on a set of instructions stored on a computer readable medium.