Theoretical Consideration On Nonlinear Distortion Suppression In Directly Optical FM Microwave over Fiber System

Abstract

and to use higher carrier frequencies and their wide frequency bandwidth under the trend of multimedia expansion of mobile radio, called mobile computing and mobile video services. These micro/pico cellular technologies will pose the following new problems: (1) many radio base stations for wide area service; (2) a long implementation time and a large investment for future new service; (3) excess base station equipment due to increasing traffic peak factor. To solve the above problems, radio highway network has been proposed [ 13. This network consists of Fiber and Radio Extension Link (FREx Link) [2] [3], so called microwave-over-fiber link and photonic switching routing nodes. (Fig. 1) In the network, radio signals transmitted by the radio terminals are encapsulated into optical signal and transferred to the appropriate remote radio control station via several optical routing nodes with their radio signal format kept. Consequently, the system can open the radio free-space for radio signals among any cell, and the radio free space can be switched instantaneously according to the demands of the mobile users or service providers.