A method for a radar system includes transmitting, by a transmit channel of the radar system, a frame comprising first, second, and third chirps. Each chirp has a chirp start frequency, and the chirp start frequency of the transmitted chirps is dithered. The method also includes receiving, by a receive channel of the radar system, a frame of reflected chirps based on the transmitted frame, and generating a digital intermediate frequency (IF) signal.

A cooperative precoding method and device. The method includes: obtaining a first sensing and communication signal sent by a first node based on a problem of interference between multi-user data; obtaining a second sensing and communication signal sent by a second node based on a problem of communication signal interference between the first node and the second node and the first sensing and communication signal; updating the first sensing and communication signal based on a problem of multi-path radar echo interference of the first node, the first sensing and communication signal, and the second sensing and communication signal; updating the second sensing and communication signal based on a problem of radar echo interference between the second node and the first node, the updated first sensing and communication signal, and the second sensing and communication signal; returning to the step of obtaining a first sensing and communication signal when the signal-to-noise ratio of a signal received by a user and the signal-to-noise ratio of a radar echo signal received by the first node do not meet a preset condition. The solutions enhance sensing performance of nodes while at the same time improve the communication performance of a target user.

An estimation is described of the speed of objects with the aid of a radar sensor that includes multiple transmitting antennas. Multiple nested sequences of frequency ramps are emitted with the aid of multiple transmitting antennas. An individual phase encoding takes place for each transmitting antenna with the aid of a harmonic code. For estimating the speed of the object, the ambiguities due to the code multiplex are resolved.

An FMCW radar apparatus employing frequency hopping technique in which a center frequency of each chirp signal is variable enables the accuracy of range measurement of the radar to be improved, by determining a high resolution range value based on a composite beat signal generated by determining a beat signal for each of a plurality of chirp signals, parts of respective frequency bands of which overlap one another, and then compensating the beat signal for a phase difference value.

A method is provided that includes a vehicle receiving data from an external computing device indicative of at least one other vehicle in an environment of the vehicle. The vehicle may include a sensor configured to detect the environment of the vehicle. The at least one other vehicle may include at least one sensor. The method also includes determining a likelihood of interference between the at least one sensor of the at least one other vehicle the sensor of the vehicle. The method also includes initiating an adjustment of the sensor to reduce the likelihood of interference between the sensor of the vehicle and the at least one sensor of the at least one other vehicle responsive to the determination.

A method for operating a radar sensing system includes configuring a transmitter to transmit a radio signal. A receiver is configured to receive radio signals. The received radio signals include the transmitted radio signal transmitted by the transmitter and reflected from objects in the environment. The method includes with advanced temporal knowledge of the codes used to modulate the transmitted radio signal, using code values of the plurality of codes, and in combination with a bank of digital finite impulse response (FIR) filters, generating complementary signals of any self-interference noise. The method further includes subtracting the complementary signals at one or more points in the receiver prior to the interference desensing the receiver. The radar sensing system further includes a frequency modulated continuous wave (FMCW) interference canceller for detecting the largest interference signals and sequentially cancelling them while signal processing the received radio signals.

According to certain embodiments, an electronic device comprises: a memory storing reference data for at least one object; a communication interface configured to perform beamforming; and a processor operatively connected with the memory, and the communication interface, wherein the processor is configured to, select at least one channel from a plurality of channels in a plurality of frequency bands, control the communication interface to transmit at least one signal including one orthogonal sequence of a plurality of orthogonal sequences, over the selected at least one channel, control the communication interface to receive at least one signal reflected by an object over the selected at least one channel, obtain data related to the object based on the transmitted at least one signal and the received at least one signal, and attempt to recognize the object using the data related to the object and the reference data for the at least one object.

In accordance with an embodiment, a radar device includes transmit circuitry configured to emit a radar signal including a plurality of frames each comprising a respective sequence of chirps. The transmit circuitry is further configured to wirelessly emit information about the radar signal to a surrounding environment. The information indicates at least one of a positioning of sequential chirps with respect to each other for at least one of the plurality of frames and a positioning of sequential frames with respect to each other in the radar signal.

Embodiments of a method and a device are disclosed. In an embodiment, a method for operating a radar system is disclosed. The method involves generating a chirp signal having a repeating pattern of chirps, each chirp in the repeating pattern of chirps having a base frequency and a chirp bandwidth, wherein the repeating pattern of chirps includes at least two chirps that differ from each other in at least one of base frequency and chirp bandwidth, transmitting a radar signal according to the chirp signal, receiving radio frequency energy that includes a reflected portion of the radar signal, and selecting for processing from the received radio frequency energy a signal that matches the repeating pattern of chirps of the chirp signal.

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.