A repeater system including one or more donor antennas, one or more server antennas and a repeater integrated with a pole.

The present invention provides a system and method for avoiding mobile relay interference to a primary system on an authorized frequency spectrum. In accordance with the system, and with an available-spectrum information provision unit which communicates with the primary system, determine, in accordance with operation information coming from said primary system, authorized-spectrum available-spectrum information capable of being used by a mobile relay when said mobile relay is located in various positional regions surrounding the primary system, and provide the available-spectrum information corresponding to each positional region to a secondary system; using the secondary system and based on the available-spectrum information corresponding to the various positional regions, determine at least one of the positional regions of the primary system, which is experiencing interference from a mobile relay located within the range of base station coverage within the secondary system, and provide each determined positional region to each mobile relay.

The invention relates to wireless repeater systems and methods. In embodiments, such systems and methods involve receiving a wireless transmission signal; and processing the wireless transmission signal using a digital signal processing facility (DSP); wherein the DSP is adapted to filter at least one sub-band of the wireless transmission signal using a digital bandpass filter.

A full-duplex analog relay may comprise an analog uplink relay and an analog downlink relay, and may relay signals between a transmitter and a backscatter node. The spectrum of the downlink signal transmitted by the downlink relay may be different than the spectrum of the uplink signal received by the uplink relay. Filtering may attenuate leakage from the downlink relay to the uplink relay, and vice versa. The uplink relay may create a phase offset that is opposite in sign and substantially equal in magnitude to the phase offset created by the downlink relay. The downlink and uplink relays, taken together, may created a substantially constant net phase offset. The full-duplex relay may be housed in a vehicle that moves, and may be used to determine spatial coordinates of backscatter sources that are located in the relay's environment.

A communication device includes: a communication unit that is allowed to simultaneously perform data transmission and data reception by using a same band; an acquisition unit that acquires information regarding self-interference generated at a time when the data transmission and the data reception are simultaneously performed by using the same band; and a communication control unit that performs control regarding the data transmission based on information regarding the self-interference or information from another device generated based on the information regarding the self-interference.

Radio frequency (RF) signal boosters are provided. A radio frequency signal booster can include a housing integrated with a base station antenna. The booster includes a mobile station antenna port, and downlink and uplink amplifiers within the housing. The base station antenna can receive wireless communications signals on one or more downlink channels and transmit wireless communications signals on one or more uplink channels. Also, the mobile station antenna port can be connected to an integrated or separate mobile station antenna, which can provide communications signals on one or more downlink channels and receive wireless communications on one or more uplink channels. An isolator in the form of a reflector integrated with the housing can isolate the mobile station antenna from the base station antenna.

The invention relates to wireless repeater systems and methods. In embodiments, such systems and methods involve receiving a wireless transmission signal; and processing the wireless transmission signal using a digital signal processing facility (DSP); wherein the DSP is adapted to filter at least one sub-band of the wireless transmission signal using a digital bandpass filter.

A modulation method and a modulation device for modulating beamforming are provided. The modulation method includes: providing a memory element that stores a beamforming table; providing a driving element; providing a plurality of modulation element groups; providing a signal source to provide at least one initial electromagnetic wave to the modulation element groups; providing a plurality of driving signals corresponding to the modulation element groups according to the beamforming table by the driving element; modulating the at least one initial electromagnetic wave to be a main wave beam with a specific radiation waveform according to the drive signals by the modulation element groups.

The present disclosure relates to a high-performance mobile communication antenna device capable of significantly reducing the number of relay stations and base stations for 5G communication by significantly improving the signal-to-noise ratio. The disclosed antenna device comprises the first high-gain low-noise amplifier, a phase shifter, a receiving and transmitting antenna part diplexers, and a band-pass filter, wherein the horizontal radiation pattern of the receiving antenna part has the same beam width as that of the transmitting antenna part, and the number of receiving radiation elements of the receiving antenna part is greater than the number of transmitting radiation elements of the transmitting antenna part.

A multiple-input, multiple-output (MIMO) repeater includes a plurality of transceiver pairs. Each transceiver pair includes a first transceiver configured to transmit and receive radio frequency (RF) signals to and from a base station (BS) via a first antenna, and a second transceiver configured to transmit and receive RF signals to and from at least one user equipment (UE) via a second antenna. The MIMO repeater also includes a processor operatively coupled to each transceiver of the plurality of transceiver pairs. The processor is configured to, for each transceiver pair: filter, via a self-interference cancellation (SIC) filter, an RF signal received from one of the first antenna or the second antenna; subtract an output of the SIC filter from the RF signal to generate a filtered RF signal; and transmit, via the other of the first antenna or the second antenna, the filtered RF signal.