Method and apparatus for controlling performance in a radio node

摘要

Controlling performance in a Time Division Duplex (TDD) radio node is provided. The TDD radio node having multiple parallel branches and antennas for radio transmission of signals propagating through a transmit chain in each of the branches before emission from the antennas. A signal generator generates a signal that propagates through each branch. A signal tapper taps the signal from each of the branches after the transmit chain. A control unit determines a timing of the tapped signal from each of the branches, and monitors timing alignment of the branches based on the determined timing of tapped signals. If it is discovered that there is a timing misalignment between the branches that exceeds a preset acceptable limit, a transmission delay can be adjusted for at least one of the branches to reduce the misalignment.

主权项

1. A method for controlling performance in a radio node using Time Division Duplex (TDD) and having multiple parallel branches and antennas for radio transmission of signals propagating through a transmit chain in each of the branches before emission from the antennas, the method comprising:
generating a single signal from a single source that propagates through said transmit chain in each of the branches; tapping said single signal, before said single signal is emitted from the antennas, from each of the branches after the transmit chain to acquire tapped signals of the single signal; determining a timing of the tapped signals of the single signal by determining a timing of the tapped signals of the single signal from each of the branches; and monitoring a timing alignment of said branches in the radio node based on the determined timing of the tapped signals of the single signal.