All-digital transmitter with RoF remote radio head

This paper presents a new radio-over-fiber system that uses an all-digital transmitter architecture enabling a very simple remote radio head comprised only by an amplifying stage, a bandpass filter and an antenna. An all-digital transmitter is proposed to implement a flexible centralized digital radio, able to perform the baseband processing and transmission of radio signals at radio frequencies (RF) over an optical fiber. The digital signal at RF is transmitted over fiber using a simple on-off digital modulation, reducing the limitations of conventional analog radio-over-fiber systems, but maintaining the advantages of a reduced complexity transmitter radio head.