Interference at colocated base stations: A review

In a colocated setting, base-station receivers have to receive weak desired signals in the presence of high-power transmit signals from neighboring base-station antennas; resulting in major interference issues. We identify three main interference categories and illustrate them through hardware measurements. We review receiver and transmitter based solutions for the interference problems. We suggest adaptive jammer cancellation and receiver postdistortion cancellation for a holistic solution to the colocation problem.