Radio Frequency Integrated Circuit System Design for UMTS Terminal Receivers

Abstract

The standardization phase for third generation wideband CDMA systems like UMTS which will add broadband data to support video, Internet access, and other high speed services for untethered devices is running towards its finalization. As is typical for mobile communication systems standardization, sufficient RF performance has been assumed and most efforts have been put to digital baseband issues. This is especially true for the mobile phone transceivers the RF part of which is, although its baseband part is much more complex in terms of number of devices, still the bottleneck of the entire system. In the RF concept engineering of today’s commercial products an accurate prediction of the needed RF performance by using RF system simulation is meanwhile indispensable. This is in particular the case with third generation wireless systems which, from the RF design point of view, are quite different from second generation TDMA/FDMA systems due to the fact that the user signals are now separated in the code domain rather than in the time and/or frequency domain. The paper gives an insight of how to derive receiver requirements for 3G mobiles in terms recognizable by microwave designers.