A plurality of radar sensors and radio units are controlled and processed by a signal processing unit (SPU). Each radar sensor receives configuration, control, power management, and calibration messages along with compressed data stream for transmission from the SPU over a multi Giga-bit interface (MGBI). Each radar sensor transmits status messages and compressed received data stream to the SPU over an MGBI. The SPU performs radar signal processing and tracking upon decompressing the data stream received from the radar sensor. Each radio unit receives configuration, control, power management, and calibration messages along with compressed frequency-domain waveform samples for each transmitter antenna port and for each component carrier configured by the SPU over an MGBI. Each radio unit transmits status messages along with compressed calibration data and compressed frequency-domain waveform samples for each receive antenna port and for each component carrier configured by the SPU over an MGBI. The SPU decompresses the frequency-domain waveform samples, and performs radio baseband signal processing including channel estimation, transmit beamforming, and receive beamforming. The SPU establishes and maintains time synchronization with each radar sensor and radio unit connected to it over an MGBI.

A method for measuring a distance to a target in a multi-user environment by means of at least one sensor, comprising: irradiating the environment by means of a series of radiation pulses, wherein series of radiation pulses are emitted at a determined repetition rate and with a determined random delay; collecting pulses that are reflected or scattered from the environment to at least a detector connected to at least one chronometer; assigning a timestamp at every detected pulse on the detector; subtracting the added delay from every registered timestamp coming from the chronometer, the result corresponding to the time of arrival; determining the statistical distribution of said time of arrival; determining the distance to the target from said statistical distribution.

Disclosed herein is a mover including an object detecting unit and either a masking processing unit or a transmission restricting unit as an additional processing unit. The object detecting unit detects an object based on a reception signal output from a receiver unit by having a transmitter unit transmit a scanning wave and by having the receiver unit receive a reflected wave, which is a component, reflected from the object, of the scanning wave. The masking processing unit performs masking processing of masking, in accordance with a timing at which, and/or a direction of incidence in which, a disturbance wave, not depending on the scanning wave, is incident on the receiver unit, a portion of the reception signal output from the receiver unit. The transmission restricting unit restricts a transmission range in which the transmitter unit transmits the scanning wave.

Disclosed are some examples of techniques for ranging and positioning of distributed devices to avoid local and/or periodic interference. For example, an initiator user equipment (UE) can broadcast a positioning reference signal (PRS) message of a current positioning session to responder UEs. One or more characteristics of PRS transmission associated with a first responder UE in the current positioning session can be determined. Based on the characteristic(s), interference with the first responder UE can be identified, which can cause the initiator UE to change the broadcast order of the responder UEs for a next positioning session.

A method for dithering radar frames includes determining at least one of a chirp period Tc for radar chirps in a radar frame and a chirp slope S for radar chirps in the radar frame. In response to determining the chirp period Tc, a maximum chirp dither Δc(max) is determined, and for the radar frame N, a random chirp dither Δc(N) between negative Δc(max) and positive Δc(max) is determined. In response to determining the chirp slope S, a maximum slope dither Ψ(max) is determined, and for the radar frame N, a random slope dither Ψ(N) between negative Ψ(max) and positive Ψ(max) is determined. A radar sensor circuit generates radar chirps in the radar frame N based on the at least one of (1) the chirp period Tc and the random chirp dither Δc(N) and (2) the chirp slope S and the random slope dither Ψ(N).

An electronic device and a control method thereof are provided. The electronic device includes an array antenna and a communication circuit which is electrically connected to the array antenna. The communication circuit is configured to determine a number of specified fields for reserving time for outputting a first signal through the array antenna and receiving a reflection signal corresponding to the first signal reflected by an external object, generate a second signal including information about the number of specified fields, and output the first signal through the array antenna after transmitting the generated second signal to an external electronic device through the array antenna, and receive the reflection signal corresponding to the output first signal.

A radar system includes a transmitter, a receiver, and a processor. The transmitter is configured to transmit a radio signal. The receiver is configured to receive a radio signal which includes the transmitted radio signal reflected from an object in the environment. The processor is configured to control the transmitter and the receiver to at least one of mitigate interference in the received radio signals, and avoid interfering radio signals transmitted by another radio transmitter.

A method for interference reduction between radar units. The method is performed by a radar unit and comprises: receiving one or more radar frames, wherein the one or more radar frames correspond to one or more respective time intervals during which the radar unit was activated to transmit and receive signals to produce data samples of the one or more radar frames; and determining whether the one or more radar frames have a higher presence of data samples that are subject to interference from other radar units in a first half of their corresponding time intervals than in a second, later, half of their corresponding time intervals. In case the presence is higher in the first half of their corresponding time intervals, a scheduled time interval of an upcoming radar frame to be produced by the radar unit is postponed, and otherwise it is advanced.

A split-steer amplifier with an invertible phase output, includes a first transistor having its base coupled to a positive node of an input port, its emitter coupled to ground, and collector connected to a positive intermediate node; a second transistor having its base coupled to a negative node of the input port, its emitter coupled to ground, and collector connected to a negative intermediate node; and multiple output ports each having a transistor arrangement operable to couple a positive node of that output port to the positive intermediate node and a negative node of that output port to the negative intermediate node, operable to couple the positive node of that output port to the negative intermediate node and the negative node of that output port to the positive intermediate node, and operable to decouple the positive node and the negative node of that output port from the intermediate nodes.

Provided in the present disclosure are a radar sensor system, and a modulation device and method thereof. The radar sensor system includes a plurality of groups of radar sensors, and each radar sensor has a serial number corresponding to an order thereof in the group. The modulation device is configured to perform modulation control on the plurality of groups of radar sensors, such that the radar sensors in the same group transmit radar signals by different time modulation and the radar sensors with the corresponding serial numbers in different groups transmit radar signals by the same time modulation.