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Abstract—Cloud radio access networks (C-RANs) feature central pooling baseband processing units (BBUs) and lowcost remote radio headends (RRHs) with fiber-connected fronthauls between them, and they are promising for 4G. Researchers are redesigning the C-RAN with different split approaches to relax the fronthaul capacity for 5G with massive antennas, which is termed soft C-RAN. In this paper, we propose...
We demonstrate a symmetric 40-Gb/s TWDM-PON system using a single tunable optical filter for both downstream wavelength selection and chirp management of upstream directly modulated laser, which supports 25-km feeder fiber and 1:256 splitting ratio.
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