A wireless User Equipment (UE) receiving system, may include tunable receiving antennas; a channel estimation module configured to: carry out a periodic, non-continuous channel estimation to a plurality of desired signals and undesired co-channel downlink signals which are transmitted from different base stations and received by said plurality of antennas, causing interference; wherein the UE receiving system is configured to select between: tuning said plurality of tunable receiving antennas so as to maximize the total average power of said desired signals; and tuning said plurality of tunable receiving antennas so as to minimize the total average power of the strongest undesired co-channel base station's signals. Alternatively, the tuning is carried out so as to maximize a power ratio between said desired signals and a combination of said undesired co-channel downlink signals having the strongest interference level and an internal noise of the receiving system.