Proposal of Asynchronous Time Division Multiple Access Radio HighwayUsing Chirp Multiplexing Transform

Abstract

Asynchronous TDMA bus-link systems using chirp multiplexing transform (CMT) are proposed for radio highway networks to provide the flexible construction of fiber-optic radio access networks and the possibility of the universal use of these networks among future diverse radio services. The CMT equipped at the radio base station performs two functions. One is the conversion of FDM multiple radio services into signals with a TDMA format and the other is the time compression of the generated signal in order to allow asynchronous access. As a result, the proposed systems can realize the unified transmission of multiple radio services and the switching of them in the optical stage (photonic routing) in the networks according to the type of radio service. The realization of such photonic routing of the radio service would greatly benefit the goal of a seamless and universal network available to different types of radio service. The relationship between the pulse-loss probability performance and the call-blocking probability performance is theoretically analyzed. The effect on the performance of traffic partiality in the covered area and the way the performance can be improved are theoretically investigated. Finally, one of the ways to determine the network size covered by a bus link and the number of connected radio base stations is introduced.