Abstract:

Broadband and wireless have become the  trend of the development of communications with the pace of the global information technology.As the key technology of 4G mobile communications,ROF(Radio Over Fiber) is no doubt the most promising solution for broadband and wireless access in the future.The key problems in ROF are analyzed in detail,including the nonlinearity  of the modulator in the centre office,the dispersion in the fiber link and the power control of microwave signal.Optimized solution is given according to different applications of rural and urban area.Furthermore,the power fading induced in  the dispersion of the fiber link is overcome.As a result,energy conservative,broadband and wireless ROF link is achievable.

Key words: radio over fiber(ROF), nonlinear;dispersion, power control