COMMUNICATION STATION WITH A PLURALITY OF ANTENNAS

摘要

PROBLEM TO BE SOLVED: To reduce interference distortion in a radio CDMA communication system, and to further increase a system capacity (the number of users). SOLUTION: The communication station includes an antenna system which is coupled to an RF receiver/transmitter which is coupled to signal processing equipment including at least one modem for processing individual CDMA communication. Preferably the antenna system includes multiple antennas and delay units and outputs a combined signal having known distortion imparted by the antenna system. The combined signal is processed by the modem. The modem compensates for the known distortion in a manner which brings an improved signal gain. The improved signal gain permits reduction in transmit power, and accordingly, an increase in the capacity of the CDMA system. When the antenna system is to be remotely located from the signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along the antenna system. Preferably a connecting cable of at least 20 feet is provided which supplies RF signals and DC power to the RF receiver/transmitter from the other signal processing equipment. COPYRIGHT: (C)2006,JPO&NCIPI