ANGLE DIVERSITY RECEIVER

摘要

PURPOSE:To decrease the number of receivers and to attain economization by connecting receivers more than directional antennas differing in direction and speech channels to the antennas and channels through switching according to a communication congestion state and a reception level. CONSTITUTION:The directional antennas 10a-10f installed on the base station of a mobile radio system at angle intervals of 60 deg. covers the whole communication area. The receivers which are more than the antennas and speech channels CH and less than twice as many as the CHs and shared among the respective CHs are connected to the antennas and transmission gates 40a-40l which are installed corresponding to the speech CHs and perform the instantaneous diversity reception of each CH optionally through connection switching circuits 30 and 50. A control circuit 60 monitors reception levels 22a-22n of the respective receivers 20a-20n to determine whether a communication with a mobile station is performed at the mean level of two receivers according to a communication congestion state and reception levels or by the instantaneous diversity reception of one receiver, and outputs switching control signals CA and CC to the circuits 30 and 50 and a frequency switching signal CF to a receiver.