Abstract

A multiband radio-over-fiber system for a fifth-generation (5G) mobile communication technology mobile fronthaul network is proposed, which can transmit radio frequency (RF) signals in four different frequency bands of 700 MHz, 1.8 GHz, 3.5 GHz, and 26 GHz with different data rates simultaneously. The proposed system can satisfy the multiscenario demand of 5G and realize 4G/5G coexistence. A dual-polarization binary phase-shift keying modulator is utilized to alleviate the interference between multiple-frequency bands. The system is analyzed theoretically and verified through simulation. The variations of error vector magnitudes (EVMs) of four transmitted RF signals in function of the received optical power (ROP) are investigated. The simulation results show that the system has good performance after 10 km standard single-mode fiber (SMMF) transmission. When the ROP is above ${-}{3.3}\;{\rm{dBm}}$, the EVM of the system conforms to the 3GPP specification. The power penalty of the system is within 1.9 dB at the 3GPP EVM performance specification after transmitting over a 10 km SSMF.

© 2021 Optical Society of America

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