Digital Radio Over Fiber Link to Overcome Impairments in Fiber Wireless Networks

Abstract

In order to meet the ever increasing demand for larger transmission bandwidth, Wireless network based on radio-over-fiber technologies is a very beneficial solution. This architecture provides flexibility,mobility and high Bandwidth. A digitized RF-over-Fiber transmission scheme based on Bandpass Sampling theory is being introduced. Various Impairments of Analog Radio over Fiber link such as nonlinearity , Intermodulation distortion,chromatic Dispersion can be mitigated by use of Digital radio over fiber link. Comparison of Analog and digital radio over fiber is presented. BER and SNR for various input schemes such as BPSK,QPSK and 16 QAM are analyzed for Analog and Digital link and comparison is presented. Impairments of Fiber wireless networks such as nonlinearity is being overcomed by using Digital Radio over Fiber link.