A centralized object detection sensor network system comprises a central unit configured to generate one or more probing signals for detecting one or more objects in an environment, and one or more transponders configured to receive the one or more probing signals and convert them into free space waves for detecting the one or more objects in the environment. The one or more transponders are communicatively coupled to the central unit through one or more communication links.

A radar unit (400) for detecting an existence of interference is described that includes: a millimetre wave (mmW) transceiver (Tx/Rx) circuit configured to radiate a transmit radar signal and receive an echo signal thereof; a mixed analog and baseband circuit operably coupled to the mmW Tx/Rx circuit; and a signal processor circuit (452) operably coupled to the mixed analog and baseband circuit. An interference detection unit (448) is operably coupled to the mmW Tx/Rx circuit and configured to: monitor a whole or a portion of a radar frequency band supported by the radar unit and identify, from a received interference signal, an arrival direction of the identified interference and a level of interference and output an interference detected signal; and wherein the signal processor circuit (452) is configured to analyse the interference detected signal and quantify a response to the detection of an arrival direction and a level of received interference.

Automotive radar methods and systems for enhancing resistance to interference using a built-in self-test (BIST) module. In one illustrative embodiment, an automotive radar transceiver includes: a signal generator that generates a transmit signal; a modulator that derives a modulated signal from the transmit signal using at least one of phase and amplitude modulation; at least one receiver that mixes the transmit signal with a receive signal to produce a down-converted signal, the receive signal including the modulated signal during a built-in self-test (BIST) mode of operation; and at least one transmitter that drives a radar antenna with a selectable one of the transmit signal and the modulated signal.

Resources are configured, by frame/subframe/slot/symbol, for uplink communication components, downlink communication components, radar sensing components, or flexible components. Flexible components are configured by symbol for uplink or downlink communications, radar sensing, or flexible usage. Full, partial or no overlap between resources for uplink, downlink or sidelink communication and resources for radar sensing may be configured. Frequency configuration for radar sensing may be in absolute units or grid units, and waveforms other than OFDM may be used for radar sensing. Configuration may be initiated by a base station in response to explicit or implicit request by a UE for sensing resources. A UE may sense resources within a configured resource pool for availability before using the resources for radar sensing.

A radar system comprises a set of transmitters and a processor coupled to the set of transmitters. The processor is configured to modulate a first portion of a chirp in a chirp frame according to a first phase. The processor is further configured to modulate a second portion of the chirp in the chirp frame according to a second phase and configured to combine the first and second portions of the chirp to produce a phase-modified chirp. The processor is further configured to instruct the set of transmitters to transmit the phase-modified chirp by applying time division multiple access (TDMA) and by directing radio frequency energy according to a target angle and a target gain.

Example embodiments described herein involve techniques for orthogonal Doppler coding for a radar system. An example method may involve causing, by a computing system coupled to a vehicle, a radar unit to transmit a plurality of radar signals into an environment of the vehicle using a two-dimensional (2D) transmission antenna array, wherein the radar unit is configured to use time division multiple access (TDMA) to isolate transmit channels along a horizontal direction of the 2D transmission antenna array and Doppler coding to isolate transmit channels along a vertical direction of the 2D transmission antenna array. The method may further involve receiving, by the computing system and from the radar unit, radar reflections corresponding to the plurality of radar signals, determining information representative of the environment based on the radar reflections, and providing control instructions to the vehicle based on the information representative of the environment.

A centralized object detection sensor network system comprises a central unit configured to generate one or more probing signals for detecting one or more objects in an environment, and one or more transponders configured to receive the one or more probing signals and convert them into free space waves for detecting the one or more objects in the environment. The one or more transponders are communicatively coupled to the central unit through one or more communication links.

The present disclosure relates to a radar system and a transmission apparatus therefor, including a signal generator for generating a first signal; a phase adjuster configured to include a plurality of input ports and at least one output port, to generate a second signal by adjusting the phase of the first signal according to an input port through which the first signal is transmitted among the plurality of input ports, and to output the generated second signal to an antenna unit; and a port selector configured to select at least one of the plurality of input ports of the phase adjuster according to an identification code and to transmit the first signal through the selected input port so that a transmission signal radiated through the antenna unit is phase inverted or formed in a pattern corresponding to the identification code, so that interference by the other radar system can be minimized, and the accuracy, reliability and frequency efficiency of the radar system can be improved.

Methods, systems, and devices for radar signaling are described. In some systems, devices may implement techniques to support coexistence for multiple radar sources using a phase-coded frequency modulated continuous wave waveform. A user equipment (e.g., a vehicle) may select a codeword (e.g., a pattern of parameters) from a codebook and may derive phase code information and waveform shape parameters from values specified in the codeword. The user equipment may apply phase modulation to at least one chirp of a waveform using the indicated phase code. In some cases, the phase-coded frequency modulated continuous wave waveform may resemble nested Zadoff-Chu sequences, where the waveform resembles a Zadoff-Chu sequence and the phase code resembles another Zadoff-Chu sequence. The phase code may support mitigating interference between radar waveforms that use the same slope and frequency offset parameters for chirps overlapping in time.

A system for radar interference mitigation, preferably including one or more transmitter arrays, receiver arrays, and/or signal processors, and optionally including one or more velocity sensing modules. A method for radar interference mitigation, preferably including transmitting a set of probe signals, receiving a set of reflected probe signals, and/or evaluating interference, and optionally including decoding the set of received probe signals and/or compensating for interference.