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

A radio base station for communication in a Time Division Duplex (TDD) mode in a cellular network, the radio base station comprising:

• a transceiver comprising a transmitter part, a receiver part, and an antenna, wherein the transmitter part transmits signals spread around a downlink central frequency and wherein the receiver part receives signals spread around an uplink central frequency;
• wherein the antenna is 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;
• wherein the transmitter part comprises a transmitter local oscillator (TX LO);
• and
• a baseband unit having a processor, to operate at the receiver part, and a non-transitory computer readable storage medium, the non-transitory computer readable storage medium storing instructions, which when executed by the processor causes the baseband unit to:
• estimate a TX LO leakage signal in the receiver part, wherein the TX LO leakage signal originates from the transmitter local oscillator, wherein the estimate comprises disregarding a received uplink signal which is represented as an AC component and retaining a DC component as an estimated leakage signal;
• and
• remove the TX LO estimated 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.

A non-transitory computer-readable storage medium storing instructions, the instructions that when executed by one or more processors of a radio base station comprising a receiver part and a transmitter part communicating in a Time Division Duplex (TDD) mode where the receiver part and the transmitter part alternately transmit and receive according to the TDD mode, cause the one or more processors to perform operations that:

• transmit, by the transmitter part, signals spread around a downlink central frequency;
• receive, at the receiver part, signals spread around an uplink central frequency;
• estimate, 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 that originates from a local oscillator of the transmitter part, wherein the estimate comprises disregarding a received uplink signal which is represented as an AC component and retaining a DC component as an estimated leakage signal;
• and
• remove, 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.