and receivers respectively and a common baseband signal processor in the method the main path direction is determined by signal direction of arrival obtained from receiving signal in the downlink beam forming an expected transmitting beam form is based on the main path direction the system can obtain advantages of smart antenna improve cell coverage increase system capacity and reduce cost application_number US 31771902 A description the invention will be further described in the following with reference to drawings and embodiments the invention is a method and an apparatus for using smart antennas in a fdd cdma wireless communication system in the following technical schemes and technical advantages of the invention will be described in detail by taking a fdd cdma wireless communication system such as a cdma fdd system of imt 2000 as an example 0040 fig1 shows a block diagram of a wireless base station 10 for a tdd wireless communication system with a smart antenna the base station works in a cdma tdd mode the antenna feed system of the base station is comprised of an antenna array of n antenna units 11 12 13 1 n and associated feeder cables i e n antenna feeder cables the n antenna feeder cables are correspondingly connected to n radio frequency transceivers trx 21 22 23 2 n respectively the radio frequency transceivers commonly use a local oscillation source frequency and timing unit 30 i e the n radio frequency.