A technology is described for feedback cancellation in a multiband booster. The repeater can comprise: a server antenna port; a donor antenna port; a first direction amplification and filtering path coupled between the server antenna port and the donor antenna port; a second direction amplification and filtering path coupled between the server antenna port and the donor antenna port; a first-direction two-antenna feedback cancellation circuit coupled between the server antenna port and the donor antenna port to reduce antenna-to-antenna feedback for a single band in a first direction between a donor antenna and a server antenna; and a second-direction two-antenna feedback cancellation circuit coupled between the server antenna port and the donor antenna port to reduce antenna-to-antenna feedback for the single band in a second direction between the donor antenna and the server antenna.

A method of transmitting and receiving a signal to and from a user equipment (UE) at a base station supporting full duplex in a wireless communication system includes the base station transmitting a first resource element (RE) set including two REs to the UE by applying different precoders to the two REs of the first RE set, and receiving a second RE set including two REs from a plurality of UEs including the UE while the first RE set is transmitted, by applying different post-coders to the two REs of the second RE set. Code division multiplexing (CDM) codes are applied to the first RE set transmitted from the base station to the UE in downlink and the second RE set transmitted from the UE to the base station in uplink.

At least one condition associated with radio communication of a radio device (10-A, 10-B-, 10-C, 100) with a further radio device (10-A, 10-B-, 10-C, 100) is monitored. In response to the at least one condition being met, full-duplex operation is activated for the radio communication of the radio device (10-A, 10-B-, 10-C, 100) with the further radio device (10-A, 10-B-, 10-C, 100). The full-duplex operation comprises transmission of a first signal on a carrier frequency from the radio device (10-A, 10-B-, 10-C, 100) to the further radio device (10-A, 10-B-, 10-C, 100) and simultaneous transmission of a second signal on the same carrier frequency from the further radio device (10-A, 10-B-, 10-C, 100) to the radio device (10-A, 10-B-, 10-C, 100).

A system for coupling a modulated voltage signal onto a current loop between a host device and a field device, in various embodiments, can include a circuit and an impedance bridge. The circuit is configured to flow current from the field device between two terminals of an input circuit in the host device, wherein the two terminals are included in the current loop. The impedance bridge is positioned between the two terminals and configured to modulate impedance to convert the current in a field loop produced by the field device into terminal voltage modulation, without introducing a DC voltage burden to the current.

A method for a user equipment includes determining full duplex capability and metric thresholds during cell search or attachment to a base station and reporting these to the base station; when in an RRC-connected state, dynamically sending reports of the metric conditions to the base station; and receiving instructions, based on the reports of the metric conditions, to communicate with the base station in one of a full duplex mode and a time division duplex mode. A method for a base station includes receiving a full duplex capability and metric thresholds from a user equipment; when in an RRC-connected state, initially scheduling the user equipment for communications in a time division duplex mode; receiving reports of metric conditions dynamically from the user equipment; and sending instructions, based on the reports, to the user equipment to communicate in one of a full duplex mode and a time division duplex mode.

An architecture for combining full-duplex and frequency division duplex communication systems, includes a coupler coupled to a terminal and configured to allow duplex transmissions of digital signals via the terminal. The subject architecture includes a filtering device coupled to the coupler and configured to divide a downstream signal received through the coupler into a plurality of downstream signals associated with a plurality of frequency ranges. The subject architecture includes a transmitter coupled to the coupler and configured to drive, through the coupler, an upstream signal comprising digital signals associated with the plurality of frequency ranges. The subject architecture also includes a plurality of receivers coupled to the filtering device and configured to receive respective ones of the plurality of downstream signals.

A full-duplex transmission control method, user equipment, and a base station, where the full-duplex transmission control method includes obtaining, by user equipment, a first time resource unit, correcting, by the user equipment according to a power offset obtained by the user equipment, first uplink transmission power used for half-duplex transmission to obtain second uplink transmission power used for the full-duplex transmission when the user equipment obtains, from the first time resource unit, included scheduling grant information indicating full-duplex transmission, and transmitting, by the user equipment, an uplink signal in the first time resource unit or a second time resource unit according to the second uplink transmission power, where the second time resource unit is a time resource unit that is after the first time resource unit in terms of time.

An integrated antenna distributed system incorporates various types of communication signals, such as mobile communication signals, public safety signals, Wi-Fi signals, and other types of communication signals. Such a system uses a single reference signal to support MIMO using a single optical cable or a single fiber optic cable, and a signal from a remote location, to support commercial telecommunication services and Wi-Fi services simultaneously. The reference signal is used for frequency stability of remote units (RUs) connected to the head end (HE). For example, a reference signal is selected and sent from the HE to RUs, a bandwidth and frequency conversion of signals to be transmitted is specified and/or performed, a RU receives the converted signals and the reference signal from the HE, where the converted signals may be frequency or band-constrained, and the converted signals are converted at the RUs back to their original frequencies or bands.

According to various embodiments of the present invention, disclosed is an electronic device comprising: a first antenna element configured so as to transmit and receive a signal of a first frequency band or a second frequency band; a second antenna element configured so as to transmit and receive the signal of the first frequency band or the second frequency band; a first RF block electrically connected to the first antenna element and the second antenna element and including a first transmission and reception circuit and a second transmission and reception circuit; an RF reception circuit for receiving the signal of the first frequency band or the second frequency band from the first antenna element or the second antenna element; and a transceiver, wherein the first transmission and reception circuit processes the signal of the first frequency band or the second frequency band, the second transmission and reception circuit processes the signal of the first frequency band or the second frequency band, and the transceiver performs CA on the signal of the first frequency band and/or the second frequency band and performs diversity on the signals received from the first RF block and the RF reception circuit.

A user equipment (UE) is described. The UE is configured to determine a duplex method of a serving cell. The UE is also configured to determine that shortened transmission time interval (sTTI) is configured on at least one of one or more downlink subframes or one or more uplink subframes. The UE is further configured to determine a sTTI downlink size and a sTTi uplink size. The UE is additionally configured to determine an association timing reference sTTI size based on the sTTI downlink size and the sTTI uplink size. The UE is also configured to determine a sTTI PDSCH HARQ-ACK transmission timing for the serving cell. The UE is further configured to determine a sTTI PUSCH scheduling timing for the serving cell. The UE is additionally configured to determine a sTTI PUSCH HARQ-ACK transmission timing for the serving cell.