Abstract: A radar system includes transmitters and receivers. The transmitters transmit radio signals. The receivers receive radio signals that include the transmitted radio signals reflected from objects in an environment. Each receiver has a controller, a buffer, and a post-buffer processor. The receiver processes the received radio signals and stored data samples in the buffer. The buffer operates in a plurality of modes defined by the controller. Modes of operation are selected for each of the respective buffers. Each buffer's mode of operation is selected to perform a desired processing on respective data samples. Each of the post-buffer processors receive their respective data samples from the respective buffers and performs further data processing on the respective data samples.

Abstract: A radar system with a transmit pipeline transmitting radio signals, and with a receive pipeline receiving radio signals including radio signals transmitted by own transmitters and reflected from objects in an environment, and interfering radio signals transmitted by other radar systems. The receive pipeline provides interference immunity from interfering radio signals transmitted by other radar systems. The transmit pipeline and/or the receive pipeline avoid transmitting radio signals that interfere with the other radar systems. The receive pipeline includes dual polarization receive channels. The interfering radio signals are a different polarization than the radio signals transmitted by own transmitters and reflected from targets in the environment. The receive pipeline provides improved signal handling dynamic range to avoid receive channels saturating at A-to-D converter stage before the radio signal has reached the digital signal processing domain.

Abstract: A radar system includes transmitters and receivers configured for installation and use in a vehicle. The transmitters transmit radio signals. The receivers receive radio signals that include the transmitted radio signals reflected from objects in an environment. Each receiver has a controller, a buffer, and a post-buffer processor. The receiver processes the received radio signals and stored data samples in the buffer. The buffer operates in a plurality of modes defined by the controller. Two or more modes of operation of the plurality of modes are performed with a same set of data samples stored in the buffer. The post-buffer processor receives data samples from the buffer and performs at least one of correlation processing to determine object ranges, Doppler processing to determine object velocity, and, in combination with other receivers of the plurality of receivers, further processing to determine angular locations of the objects.

Abstract: A radar system has different modes of operation. In a method for operating the radar system, at least one of one or more transmitters are configured to transmit modulated continuous-wave radio signals, while at least one of one or more receivers are configured to receive radio signals. The received radio signals include the transmitted radio signals transmitted by the one or more transmitters and reflected from objects in the environment. The method further includes selectively modifying an operational parameter of at least one of the transmitters or at least one of the receivers. The selected operational parameter is modified to meet changing operational requirements of the radar sensing system.

Abstract: A radar system operated in a variable power mode includes transmitters, receivers, and a controller. The transmitters transmit digitally modulated signals. The receivers receive radio signals that include transmitted radio signals from the transmitter and reflected from objects in the environment. In addition, an interfering radar signal from a different radar system is received that has been linearly frequency modulated. Each receiver includes a linear frequency modulation canceler that includes a FIR filter, and is configured as a 1-step linear predictor with least mean squares adaptation to attempt to cancel the interfering signal. The prediction is subtracted from the FIR input signal that drives the adaptation and also comprises the canceler output. The controller is configured to control the adaptation on a first receiver. The controller delays the adaptation such that transients at the start of each receive pulse are avoided.

Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system includes transmitters configured to transmit radio signals, receivers configured to receive radar signals, and a control unit. The received radio signals include transmitted radio signals transmitted by the transmitters and reflected from objects in an environment. The control unit adaptively controls the transmitters and the receivers based on a selected operating mode for the radar system. The selected operating mode meets a desired operational objective defined by current environmental conditions. The control unit is configured to control the receivers to produce and process data according to the selected operating mode.

Abstract: A radar system operated in a variable power mode includes transmitters, receivers, and a controller. The transmitters transmit digitally modulated signals. The receivers receive radio signals that include transmitted radio signals from the transmitter and reflected from objects in the environment. In addition, an interfering radar signal from a different radar system is received that has been linearly frequency modulated. Each receiver includes a linear frequency modulation canceler that includes a FIR filter, and is configured as a 1-step linear predictor with least mean squares adaptation to attempt to cancel the interfering signal. The prediction is subtracted from the FIR input signal that drives the adaptation and also comprises the canceler output. The controller is configured to control the adaptation on a first receiver. The controller delays the adaptation such that transients at the start of each receive pulse are avoided.

Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements. The system also adapts to changing environmental conditions including interfering radio signals.

Abstract: A radar system includes an interference manager. The interference manager detects the presence and the characteristics of interfering radio signals used by other radar systems in proximity. The interference manager also controls the operating characteristics of the radar system in response to the detected interfering signal characteristics. The interference manager selects a time slot, or a frequency band, or a time slot and a frequency band to avoid or mitigate the interfering radio signals from other radar systems.

Abstract: A multi-chip MIMO radar system includes a plurality of transmitters and a plurality of receivers. Each of the pluralities of transmitters and receivers are arranged across a plurality of chips. The multi-chip MIMO radar system includes a central processor configured to receive data from the plurality of chips. The central processor is operable to combine the information from each radar chip to produce improved range detection and angular resolvability of targets.

Abstract: A radar sensing system includes a plurality of transmitters configured to transmit radio signals and a plurality of receivers configured to receive radio signals. First and second transmitters of the plurality of transmitters are configured to generate radio signals defined by first and second spreading code chip sequences, respectively. A first receiver of the plurality of receivers processes received radio signals as defined by a plurality of spreading code chip sequences that includes at least the first and second spreading code chip sequences. The radar sensing system also includes a code generator for generating the spreading code chip sequences.

Abstract: A radar system including a transmitter configured for installation and use with the radar system and configured to transmit radio signals. The transmitted radio signals are defined by a spreading code. The radar system also includes a receiver configured for installation and use with the radar system and configured to receive radio signals that include transmitted radio signals transmitted by the transmitter and reflected from objects in an environment. The receiver is configured to convert the received radio signals into frequency domain received samples. The receiver is also configured to correlate the frequency domain received samples to detect object distance.

Abstract: A radar includes transmitters, receivers, a memory, and a processor. The transmitters transmit radio signals, and the receivers receive reflected radio signals. The processor produces samples by correlating reflected radio signals with time-delayed replicas of transmitted radio signals. The processor stores this information as a first data structure, with information related to signals reflected from objects as a function of time (one dimension of the data structure) at various distances (a second dimension of the data structure) for various receivers (a third dimension of the data structure). The first data structure is processed to compute velocity and angle estimates, which are stored in second and third data structures, respectively. One or more memory optimizations are used to increase performance. Before storing the second and third data structures in a memory, the second and third data structures are sparsified to only include the outputs in specific regions of interest.

Abstract: A radar sensing system for a vehicle has multiple transmitters and receivers on a vehicle. The transmitters are configured to transmit radio signals which are reflected off of objects in the environment. There are one or more receivers that receive the reflected radio signals. Each receiver has an antenna, a radio frequency front end, an analog-to-digital converter (ADC), and a digital signal processor. The transmitted signals are based on spreading codes generated by a programmable code generation unit. The receiver also makes use of the spreading codes generated by the programmable code generation unit. The programmable code generation unit is configured to selectively generate particular spreading codes that have desired properties.

Abstract: A radar sensing system for a vehicle includes a transmitter configured for installation and use on a vehicle and able to transmit radio signals. The radar sensing system also includes a receiver and a processor. The receiver is configured for installation and use on the vehicle and is able to receive radio signals that include transmitted radio signals reflected from objects in the environment. The processor samples the received radio signals to produce a sampled stream. The processor processes the sampled stream such that the sampled stream is correlated with various delayed versions of a baseband signal. The correlations are used to determine an improved range, velocity, and angle of targets in the environment.

Abstract: A radar system includes a transmitter, a receiver, and a processor. The transmitter transmits continuous wave radio signals. The receiver receives radio signals that includes the transmitted radio signal reflected from targets in an environment. The targets include a first target and a second target. The first target is closer than a first threshold distance from the vehicle, and the second target is farther than the first threshold distance from the vehicle. A processor is configured to process the received radio signals. The processor is configured to selectively process the received radio signals to detect the second target. The processor selectably adjusts operational parameters of at least one of the transmitter and the receiver to discriminate between the first target and the second target.

Abstract: A radar sensing system for a vehicle includes transmitters, receivers, a memory, and a processor. The transmitters transmit radio signals and the receivers receive reflected radio signals. The processor produces samples by correlating reflected radio signals with time-delayed replicas of transmitted radio signals. The processor stores this information as a first radar data cube (RDC), with information related to signals reflected from objects as a function of time (one of the dimensions) at various distances (a second dimension) for various receivers (a third dimension). The first RDC is processed to compute velocity and angle estimates, which are stored in a second RDC and a third RDC, respectively. One or more memory optimizations are used to increase performance. Before storing the second RDC and the third RDC in an internal/external memory, the second and third RDCs are sparsified to only include the outputs in specific regions of interest.

Abstract: A multi-chip MIMO radar system includes a plurality of transmitters and a plurality of receivers. Each of the pluralities of transmitters and receivers are arranged across a plurality of chips. The multi-chip MIMO radar system is configured to provide an exemplary chip synchronization such that the transmitters and receivers of each chip of the radar system are synchronized with the transmitters and receivers of every other chip of the radar system.

Abstract: A radar sensing system includes a transmitter and a receiver. The transmitter is configured to transmit a radio signal. The receiver is configured to receive radio signals that include the transmitted radio signal reflected from objects in the environment. The transmitter and receiver are configured to distribute the signal power over frequency so that it is separated from noise and impairments at DC and low frequencies as may be caused by some radar system components which introduce DC offsets and/or low frequency (e.g. flicker) noise.

Abstract: A radar system includes a transmitter, a receiver and a processor. The receiver receives radio signal that includes the transmitted radio signal reflected from targets in the environment. The received radio signal is provided to the processor. The processor samples the received radio signal during a plurality of time intervals to produce a sampled stream. The different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from the targets. The processor also selects a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the targets that are closer than a first threshold distance from an equipped vehicle. The transmitter and/or the receiver is adjusted such that samples of radio signals reflected off of targets that are farther than the first threshold distance are detected.