On the optimum DS-CDMA channel bandwidth for personal communication systems

Abstract

With) the development of both n a r r o w b m d and wideband D S -C D M A s y s t e m s there has been m u c h interest in establishing the optismum spread spectru,m bandw%dth. Previous publications by the authors have indica,ted the importance of the bandwidth allocation in, determining the D S -C D M A system's ability to exploit the temporally dispersive effects of the mobile radio chann,el. This paper discusses s o m e of the issues concerning the o p t i m u m spread spectrum bandwidth foruse in proposed 3rd generation systems, such as th.e European Universal Mobile Telecommunications S y s t e m (UMTS), based upon recent system-specific ,uiideband channel soundiuy measurements in the C i t y of Bristol combin.ed ,with results fro,m computer simulation. of a RAKE receiver arch.itecture.