Digital Fiber Optic Repeater - Advanced Digital Transmission Technology, Long-distance Low Noise Performance, Flexible Function Extension

These Digital Fiber Optic Repeater (FOR) adopts software wireless technologya digital filter technology and digital transmission technology, conquer the limiting disadvantage of simulate fiber optic transmission distance, satisfy the requirements of large dynamic and low noise while long distance transmission. In a situation of changeless hardware platform, Digital FOR realizes function extension of device via upgrade device software, and the way is flexible and convenient for using. Digital FOR much excellent than Simulate FOR no matter in frequency selectivitya anti-jamming ability or in function extension.
Working Principle: the Donor Unit of Digital FOR couple the base station downlink signal, convert radio signal to intermediate frequency(IF) by Duplexer and frequency conversion module, then sample the simulate IF signal to digital signal by High Speed A/D Converter of IF Slab, thereby achieve Digital Down Converting. According to the mobile network requirements of different systems, FPGA achieve channelized processing, accomplish AGC and automatism noise elimination. FPGA also implement CPRI agreement to convert optic module to optic signal and send to Remote Unit. The Remote Unit of Digital FOR convert the optic signal to digital signal, IF Slab convert DUC which through FPGA and send it to D/A Converter.