Abstract: A radio repeater system may include: a multiple input multiple output (MIMO) donor antenna configured to transmit/receive MIMO signals to/from base stations; a beamforming control unit configured to control beamforming by adaptively applying a phase weight to the repeated signals received from the MIMO donor antenna; an interference signal cancellation unit configured to estimate and analyze feedback interference signals introduced from a MIMO service antenna to the MIMO donor antenna and adaptively cancel the feedback interference signals; and the MIMO service antenna configured to transmit/receive MIMO signals to/from radio terminals in a service area.

Abstract: A radio repeater system may include: a multiple input multiple output (MIMO) donor antenna configured to transmit/receive MIMO signals to/from base stations; a beamforming control unit configured to control beamforming by adaptively applying a phase weight to the repeated signals received from the MIMO donor antenna; an interference signal cancellation unit configured to estimate and analyze feedback interference signals introduced from a MIMO service antenna to the MIMO donor antenna and adaptively cancel the feedback interference signals; and the MIMO service antenna configured to transmit/receive MIMO signals to/from radio terminals in a service area.

Abstract: Provided is a united Adaptive Forward Error Correction (U-AFEC), including: an automatic gain control unit for controlling a gain of forward/backward relay signals; a switching unit for switching the forward/backward relay signals; a forward feedback signal detecting unit for detecting and updating a phase and a size of a feedback signal; a backward feedback signal detecting unit for detecting and updating the phase and the size of the feedback signal; a reverse feedback signal synthesizing unit for generating a reverse feedback signal based on the phase and the size of the feedback signal; a feedback signal removing unit for removing the feedback signal in the forward/backward relay signals and transmitting the forward/backward relay signals to the automatic gain control unit; and a control unit for removing the feedback signal in the forward/backward relay signals and controlling each constituent element.

Abstract: Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit. According to the RF repeater and repeating method, installation cost is reduced, limitations in output magnitude and installation are overcome, and ensuring high output power characteristics.

Abstract: A base station system for mobile communication between a mobile terminal and a base station controller, the base station system utilizing a digital modem unit for receiving a signal to be transmitted to the mobile terminal from the base station controller, framing the received signal according to a frame format for transmission different than an Ethernet specified data format, the frame format being a predetermined remote RF (radio frequency) unit frame, the digital modem unit transmitting a plurality of the remote RF unit frames in series over an Ethernet using twisted pair cable, at least one remote RF unit hub receiving the remote RF unit frames transmitted by the digital modem unit and distributing the received remote RF unit frames to a plurality of remote RF units via the Ethernet using twisted pair cable, and the plurality of remote RF units producing a deframed signal by deframing the remote RF unit frames received from the remote RF unit hub, modulating the deframed signal to an RF signal, and transm

Abstract: Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit. According to the RF repeater and repeating method, installation cost is reduced, limitations in output magnitude and installation are overcome, and ensuring high output power characteristics.