The disclosure relates to a cancellation device for cancelling interference caused by a non-linear device, the cancellation device comprising: an adaptive filter coupled in parallel to the non-linear device, wherein the adaptive filter is configured to filter an input signal of the non-linear device to generate an approximation signal approximating an output signal of the non-linear device; an error signal generator configured to generate an error signal based on a function of the output signal and the approximation signal; and a controller configured to adjust the adaptive filter based on the error signal and a phase and magnitude relation of the output signal and the input signal.

Disclosed are systems, methods, and non-transitory computer-readable media for a segmented ECF that includes multiple filter components to replicate an echo pulse response. The different filter components are used to replicate different portions of the echo pulse response. Each filter components can include filter coefficients of different sizes based on the portions of the echo pulse response that is replicated by the filter component. For example, a filter component that replicates a portion of the echo pulse response that includes a large reflection can include large filter coefficients suitable to replicate the larger reflection. In contrast, a filter component that replicates a portion of the echo pulse response that includes smaller reflections can include smaller filter coefficients that are suitable to replicate the smaller reflection. The output of each of the filter components is combined to replicate the full echo pulse response.

A system for frequency isolation modified self-interference cancellation includes a transmit coupler, that samples an RF transmit signal; an RF self-interference canceller that transforms the sampled RF transmit signal to an RF self-interference cancellation signal; a receive coupler that combines the RF self-interference cancellation signal with the RF receive signal to form a reduced-interference receive signal; and a frequency shifter that frequency shifts only one of the RF transmit signal and the reduced-interference receive signal.

The present invention provides a processing method based on an OFDM-TDMA two-way service and a communications device. The method includes assigning timeslots in a TDMA frame structure to multiple users in a TDMA manner, so that each user has a different timeslot, and each timeslot of the users is simultaneously used for uplink and downlink communication. The methods further includes simultaneously sending a local-end OFDM signal and receiving a remote-end OFDM signal in each timeslot of the users, and cancelling, in an OSD manner, interference caused by an echo OFDM signal, which is produced according to the local-end OFDM signal, to the remote-end OFDM signal, where a spectrum of the echo OFDM signal and a spectrum of the remote-end OFDM signal overlap.

A method of measuring a self-interference channel in user equipment in a full duplex radio (FDR) communication environment is disclosed. The method includes receiving, from a base station, resource allocation information including information about a time interval, the base station stopping transmission of a signal in the time interval for measurement of the self-interference channel in the user equipment, transmitting a first reference signal for measurement of the self-interference channel in the time interval specified by the resource allocation information, and receiving a second reference signal input to a receiver of the user equipment according to self-interference in the time interval, wherein the second reference signal is a signal corresponding to the first reference signal transmitted over a wireless channel.

The present invention brings about an effect of reducing a deterioration in communication quality that may occur in a communication circuit that can communicate in different communication modes. A communication circuit (100) of an aspect of the present invention includes a control section (109) that (i) controls a reception filter (194) such that respective passbands of a transmission filter (103) and the reception filter (104) are different from each other in a case where a full-duplex communication is made in a FDD mode, and (ii) controls the reception filter (104) such that at least part of the passband of the transmission filter (103) and at least part of the passband of the reception filter (104) overlap each other in a case where a full-duplex communication is made in a TDD mode.

A system includes a base band unit pooling component that determines, via a base band unit pool of base station devices, respective uplink channel estimates of an uplink channel wirelessly coupling, using frequency division duplexing via respective modular antenna elements, a user equipment to the base band unit pool. A downlink channel estimation component of the system derives, based on the respective uplink channel estimates, a downlink channel estimate of a downlink channel wirelessly coupling, using the frequency division duplexing via a portion of the respective modular antenna elements corresponding to a base station device of the base band unit pool, the base station device to the user equipment. In turn, the system generates, using the downlink channel estimate, a group of downlink sector beams to be transmitted to the user equipment using the downlink channel via the portion of the respective modular antenna elements.

The present disclosure provides a method of transmitting and receiving a signal by a user equipment (UE) in a wireless communication system. The method may include: transmitting an uplink (UL) signal including a reference signal (RS) to a base station; measuring a self-interference (SI) signal based on the UL signal; and transmitting a message based on the measured SI signal. The message may include a request for RS change or information about the state of the measured SI signal.

Embodiments of the present invention provide a reflector antenna and a reflector antenna feed. The reflector antenna feed includes a transmit antenna array and a receive antenna array, where the transmit antenna array includes at least two transmit antenna units. The receive antenna array includes at least two receive antenna units. Also, a phase center of the transmit antenna array coincides with that of the receive antenna array, where at least one coupling unit is disposed between at least one group of a transmit antenna unit and a receive antenna unit that are adjacent to each other.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive a group common downlink control information transmission comprising a cross-link interference (CLI) measurement request indication. The network node may determine a channel state information interference measurement during an interference measurement occasion, wherein the interference measurement occasion is indicated by the CLI measurement request indication. Numerous other aspects are described.