A radio frequency (RF) circuit includes an input terminal configured to receive a reception signal from an antenna; an output terminal configured to output a digital output signal; a receive path including a mixer and an analog-to-digital converter (ADC), wherein the receive path is coupled to and between the input and output terminals, wherein the receive path includes an analog portion and a digital portion, and wherein the ADC generates a digital signal based on an analog signal received from the analog portion; a test signal generator configured to generate an analog test signal injected into the analog portion of the receive path; and a digital processor configured to receive a digital test signal from the digital portion, the digital test signal being derived from the analog test signal, analyze a frequency spectrum of the digital test signal, and determine a quality of the digital test signal.

A radar detection method includes transforming a beat frequency signal of a radar into a two-dimensional spectrogram; intercepting, based on a time domain sliding step, a plurality of measurement units (MUs) whose time domain lengths are equal to a frequency modulation period of the radar from the two-dimensional spectrogram, where a length of the time domain sliding step is less than the frequency modulation period of the radar; and determining a radar detection result based on each of the plurality of MUs.

A pseudo sheet structure is usable for a sensor configured to emit an electromagnetic wave in a band ranging from 20 GHz to 100 GHz. The pseudo sheet structure includes a plurality of conductive linear bodies arranged at an interval L satisfying a formula (1) below, 0.034×λ.sub.S≤L≤20 mm (1). In the formula (1), L is the interval between the plurality of conductive linear bodies, λ.sub.S is a wavelength of the electromagnetic wave emitted by the sensor, and a unit for each of L and λ.sub.S is mm.

This application provides a method for reducing interference between a radar and an uplink frequency band. A first network device obtains a characteristic of a radar signal on the uplink frequency band, and determines a corresponding protection measure based on the characteristic of the radar signal, to reduce interference between the radar signal and the uplink frequency band. In this way, when 5G communication collides with the radar in time domain and frequency domain of the uplink frequency band, the 5G communication and the radar can still coexist. This improves utilization of a wireless spectrum.

The present disclosure relates to an electronic device and a method for performing ranging through a UWB communication including receiving state information of each of moving nodes occupying channels provided by anchor nodes in a UWB communication area to perform ranging on the anchor nodes, setting priorities of the moving nodes based on the state information, and recovering one of the channels occupied by the moving nodes based on each of the priority.

A method, system and apparatus are described for implementing a tiered SSB framework for radar coexistence. A tiered-SSB based radio resource management may be implemented. Tiered-SSB based radio resource management are implemented in downlink and/or uplink.

An antenna system (1) comprises a directional antenna (2) adapted to rotate through a range of directions in azimuth. It is responsive to radio-frequency (RF) signals received from directions within the range of directions in azimuth. A receiver (7) is arranged to receive the RF signals from the antenna within a signal frequency response band of the receiver and to provide a corresponding output for signal processing. A signal filter (11) is operable to block the output from the receiver when the frequency of the RF signal lies at a frequency within the signal frequency response band of the receiver and a detector unit (8) is arranged to apply the signal filter when the directional antenna is directed to a predetermined azimuth at which an interference source is located and to not apply the signal filter otherwise.

According to an aspect, a method of determining Doppler in a radar system comprising receiving a set of chirps, sampling in time the set of chirps to generate a set of non-uniform samples with one sample per chirp that is non-uniform in time in each chirp across the set of chirps, generating a first Doppler frequency from the set of non-uniform samples, generating a set of non-aliased Doppler frequencies for the first Doppler frequencies from a corresponding set of hypothesis, determining a first set of angles of arrival for every non-aliased Doppler frequency in the a set of non-aliased Doppler frequencies and selecting a first non-aliased Doppler frequency in the set of non-aliased Doppler frequencies that corresponds to the first angle of arrival with a minimum error in the a set of angles of arrival.

A method of generating a reference signal for transmission over a wireless communication channel comprises generating a first signal of a first characteristic, generating a second signal with second characteristic, scaling the second signal at least in time and an amplitude to form a scaled signal and iteratively adding the scaled signal to the first signal to generate the reference signal. The iteratively adding comprises time indexing the first signal with plurality of time points, adding the scaled signal to first signal at each time point in the plurality of time points, computing a cost function to determine the cost of adding the scaled signal at each time point in the plurality of time points, selecting a set of time points that indicate reduction in the cost when the scaled signal is added and adjusting the amplitude of the scaled signal at each time point in the set of time points to reduce the cost.

The present invention relates to a device that processes a radar signal, and a method therefor. More particularly, the present invention relates to a device and a method for reducing an interference signal by predicting occurrence of an in-band interference signal. Particularly, the present invention provides a radar signal processing device and method, the radar signal processing device comprising: an interference reference flag configuration unit that divides a transmission signal into a plurality of blocks in preconfigured time units on a time axis, and configures an interference reference flag for one or more specific blocks selected among the plurality of blocks; an impulsive noise detection unit that detects whether an impulsive noise occurs in each of the plurality of blocks, by using a reception signal; an in-band flag configuration unit that configures an in-band flag by using the interference reference flag and a block in which the impulsive noise is detected; and an interference signal prediction unit that predicts introduction of an in-band interference signal according to whether an in-band flag exists.