Code Division Multiple Access (CDMA) Digital Cellular Mobile Communications Repeater

摘要

1. TECHNICAL FIELD OF THE INVENTION;CDMA Digital Cellular Mobile Repeater;2. The technical problem to be solved by the invention;In the repeater of the conventional CDMA digital cellular system, it is intended to solve the problem of deterioration of call quality and increase of installation space and cost due to the use of multiple antennas in implementing a space diversity time delay method using two antennas.;3. Summary of Solution to Invention;A first duplexer (2) for switching transmission / reception paths of a signal transmitted from a base station and a signal transmitted from a terminal; The transmission signal of the base station through the first duplexer (2) receives the first low noise amplifier (3) and the first band pass filter (4) in order to be separated into two high frequency and the separated signal is set time A first high frequency delay and combining means (5) for delaying the delayed frequency and then combining and outputting the separated high frequency and the delayed high frequency; The antenna 11 receives the high frequency obtained from the first high frequency delay and coupling means 5 through the first and second amplifiers 6 and 7 and the second band filter 8 and the first isolator 9 in order. A second duplexer (10) for switching to transmit to the terminal through a transmission path, and receiving the signal transmitted from the terminal through the antenna (11) to transmit to the base station; The transmission signal of the terminal switched by the second duplexer 10 is sequentially received through the second low noise amplifier 12 and the third band pass filter 13, separated into two high frequencies, and the separated single signal is set. And a second high frequency delay and coupling means 14 which combines the non-delayed separated high frequency and the delayed high frequency and then outputs the transmission to the base station through the first duplexer 2 after a delay by time. .;4. Important uses of the invention;It is applied to a repeater that relays data communication between a base station and a terminal in a CDMA digital cellular mobile communication system.