CELLULAR RADIO TELECOMMUNICATION SYSTEM

摘要

A cellular radio telecommunication system comprises a basestation having at least two antennas (107, 114). Each antenna is arranged to transmit a downlink signal to one or more mobile subscriber units. The downlink signal is transmitted from each antenna (107, 114) having a mutual time delay and phase difference, the phase difference changing from time to time. Because of the mutual phase differences, if the signals received at a mobile station are mutually in anti-phase during one time slot of the downlink signal, there is a very low probability that they will also be in anti-phase at the corresponding time slot in the next several frames.