Receive antenna selection techniques for femtocell uplink interference mitigation

Reduced-complexity receive antenna selection methods are proposed for interference rejection combining receiver of femtocell base stations. The methods are designed for cases with exact channel information and with channel covariance matrix of interference plus noise at the receiver. Simulation results show that the presented methods can almost achieve the same performance obtained by an exhaustive antenna selection, while the complexity is significantly reduced. More important, the proposed methods perform well even when the number of interferers is equal or greater than the number of active antennas.