Method for controlling performance in a radio base station arranged for communication in TDD mode, and radio base station

摘要

The present invention relates to a method for controlling performance in a radio base station communicating in a Time Division Duplex (TDD) mode in a cellular network. The radio base station has a transceiver comprising a transmitter part, a receiver part, and an antenna, the antenna being alternately connectable to the transmitter part and the receiver part. The method comprises: estimating, at the receiver part, a leakage signal in the receiver part, the leakage signal originating from a local oscillator of the transmitter part; and removing, at the receiver part, the estimated leakage signal from a received uplink signal. The present invention also relates to a corresponding radio base station.

主权项

1. A method for controlling performance in a radio base station communicating in a Time Division Duplex (TDD) mode in a cellular network, wherein the radio base station has a transceiver comprising a transmitter part, a receiver part, and an antenna, the antenna being alternately connectable to the transmitter part and the receiver part for the radio base station to alternately transmit and receive according to the TDD mode, the method comprising:
transmitting, by the transmitter part, signals spread around a downlink central frequency; receiving, at the receiver part, signals spread around an uplink central frequency; estimating, at a baseband portion of the receiver part, a transmitter local oscillator (TX LO) leakage signal in the receiver part, the TX LO leakage signal originating from a local oscillator of the transmitter part, wherein the estimating comprises disregarding a received uplink signal which is represented as an AC component and retaining a DC component as an estimated leakage signal; and removing, at the baseband portion of the receiver part, the TX LO leakage signal by utilizing the estimated leakage signal as the TX LO leakage signal to recover the received uplink signal free of the TX LO leakage signal.