Patent ID: 8224240

Claim:
A device for realizing beam-forming in CDMA system, said device comprising: in a forward signal flow, at least a base band system, an optical transceiver system, transceiver systems, an analog fixed beam-forming network, a power amplifier, a transmission filter of a radio frequency front end and an antenna system; and in a reverse signal flow, at least the antenna system, a reception filter of a radio frequency front end, a low noise amplifier, the analog fixed beam-forming network, the transceiver systems, the optical transceiver system and the base band system; wherein, said base band system comprises at least one base band chip, and the at least one base band chip have a plurality of sectors; wherein, the optical transceiver system comprises first optical interface board close to the base band system, second optical interface board close to the transceiver systems, and an optical fiber between the first optical interface board and the second optical interface board, the first and second optical interface board being used to interconvert electronic signals and optical signals input; and the optical transceiver system is configured to enable the base band system be placed in a warehouse so as to make the base band system support the plurality of sectors, and to enable a radio frequency part close to the antenna so as to reduce power loss; wherein, the base band system is configured to, when transmitting forward signals on a common channel, make different beams be reflected to the sectors of the at least one base band chip to have different time delays, so that the different beams are not coherent with one another even when the different beams carry same information.