Study Of The Radio Over Fiber Technology Based On Multimode Fiber

With the development of telecommunication and society, the future wireless communication technology should meet the vast demands for accessing the network anytime, anywhere, and anything with a high bandwidth, especially for wireless last mile access. To offer the needed high capacity, it appears inevitable to increase the carrier frequencies and to reduce cell size. Therefore, more antenna base stations with very complicated equipments are needed to build up.ROF technology has the potential to drive the next generations' thirst for high data rate over the wireless interface. It reduces system-wide installation and maintenance costs, simplifies the remote antenna base station, and makes signal format transparent. Multimode optical fiber, widely applied in short to medium fiber infrastructure, has been providing a cost-reducing alternative for the commonly used single-mode fiber due to its low installation and maintenance costs, large core diameter for easy coupling and splicing.In this thesis, we performed a transmission performance evaluation for ROF with multimode fiber. The characteristics of ROF are discussed first. Some theories of guiding light through multimode fiber are introduced. According to the comprehensive measurements and analysis of RoPOF, SFDR of RoPOF is up to 63.4dB, far beyond the standards. The eye diagrams and EVM of the RF signals carrying QPSK, GSM signals are measured to further evaluate the transmission performance. The design of ROF with multimode silica fiber and VCSEL are also expatiated. At last, some other new technologies about ROF with multimode fiber are recommended.