The present application relates to a method of allocating resources for transmission of pilot signals of a plurality of terminals of a cellular multiple-input and multiple-output system. The cellular MIMO system comprises a base station having a plurality of antennas and a logic which analyzes pilot signals received from a terminal at the plurality of antennas to obtain information about a radio channel property of the radio channel between the terminal and the plurality of antennas. According to the method, the base station determines whether the radio channel property between the terminal and the plurality of antennas is constant over a period of time. If the radio channel property is constant over a period of time, receiving parameters of the plurality of antennas are configured for nulling pilot signals from the terminal, and a resource, which is assigned to the terminal for a transmission of pilot signals, is assigned to another terminal.