A Dual-Band Radio-Over-Fiber Link for Future 5G Communication System

In the existing fifth-generation (5G) communication system, the remote radio unit (RRU) has a large weight, size and power consumption, and there are also compatibility problems between the low-frequency and the high-frequency millimeter wave frequency band system. Based on the microwave photonics technology, a dual-band radio over fiber (RoF) link is proposed, which can realize the simultaneous transmission and channel switching of the low-frequency (3.5 GHz) and high-frequency (28 GHz). In the low-frequency band, the nonlinear distortion is suppressed, and in the high-frequency millimeter wave band, the power fading caused by dispersion is suppressed.