Method for reducing interference in a radio network equipment and equipment performing the method

摘要

Method and system for reducing interference between adjacent antennas wherein one antenna transmits a first signal from a transmitter equipment and a second antenna receives a second signal by a receiver equipment, the first and the second signals may have the same frequency, and the angular discrimination between the TX antenna and the RX antenna in the same location is low. The transmitter equipment inputs an intermediate frequency contribution of the first signal into a cross-polar interference canceller, included in the receiver equipment, for reducing a co-channel interference in the receiver equipment caused by the first and the second signals, wherein the cross-polar interference canceller selects a desired signal from the two signals received so as to reduce said interference.

主权项

1. A method for reducing interference between at least two adjacent antennas comprising a receiver equipment antenna and a transmitter equipment antenna, comprising:
transmitting a first signal from the transmitter equipment antenna; receiving the first signal at the receiver equipment antenna; receiving a second signal at the receiver equipment antenna; inputting the received first and second signals into a cross-polar interference canceller, included in the receiver equipment, for processing; calculating at least one of a respective power and a respective BER of the processed first and the second signals; selecting, between the processed first signal and the processed second signal, the signal that has its respective power greater than the respective power of the other signal, or the one that has its respective BER lower than the respective BER of the other signal; or selecting between the processed first signal and the processed second signal the signal that has its respective power greater than the respective power of the other signal and has its respective BER lower than the respective BER of the other signal; wherein the transmitter equipment antenna and receiver equipment antenna are installed adjacent to each other on a common tower.