TRANSMISSION CHANNEL, CONTROL METHOD THEREFOR, CONTROLLER, RADIO COMMUNICATION DEVICE, CORRECTION CIRCUIT AND COMPUTER-READABLE MEDIUM Russian patent published in 2014 - IPC H03F5/00 H04L27/36 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to correction of quadrature errors associated with digital communication systems, and can be used in digital communication systems. The invention discloses a transmission circuit, a control method therefor, a controller, a wireless communication device and a correction circuit. The transmission channel includes a correction circuit, which has an in-phase input port, a quadrature input port, an in-phase output port and a quadrature output port, and each input port is connected to each output port by a digital filter circuit, wherein the digital filter circuit includes a series of filter tapping weight coefficients and a configuration means for configuring said series of filter tapping weight coefficients. Input signals are converted and a portion thereof is transmitted to a quadrature down-converter. By comparing the down-converted signal with the input signal, the controller changes the set of values of filter tapping weight coefficients based on an error signal in order to correct the frequency-dependent quadrature error.

EFFECT: correcting phase errors between in-phase and quadrature circuits.

12 cl, 11 dwg