LEAKAGE REDUCTION FROM TRANSMITTER TO RECEIVER IN FULL-DUPLEX SYSTEM WITHOUT USING DUPLEXER Russian patent published in 2017 - IPC H04B1/52 

FIELD: physics, communication.

SUBSTANCE: invention relates to communication. The transceiver suitable for the duplex frequency division is disclosed. The transceiver contains a transmitter, wherein the transmitter has a power amplifier; a receiver; an auxiliary power amplifier, which is adapted to provide an output signal with a controlled gain and phase shift; the first filter provided at the output of the power amplifier adapted to weaken frequency at the receiver frequency; the second filter unit at the output of the auxiliary power amplifier adapted to weaken frequency at the receiver frequency; and a signal transfer device. The signal transfer device is adapted to transmit signals provided by the transmitter through its power amplifier to the point of the radio frequency, RF, connection, receiving of the signals from the RF point of the connection and transmitting of the signals to the receiver and transmitting of the signals from the auxiliary amplifier at the receiver input. The transceiver also includes a controller, wherein the controller is adapted to control the output of the auxiliary amplifier to provide a signal, which has a phase and amplitude relative to the output signal of the transmitter power amplifier, so that the transmitter contribution to the signal at the receiver input is suppressed.

EFFECT: by providing countercontribution in regard to power amplifier contribution of the transmitter at the receiver input to the transceiver, this contribution can be suppressed.

33 cl, 17 dwg