Saw and digital technologies in mutlicarrier demodulators

Abstract

One key technology, for the implementation of future on-board processing payloads, is the multicarrier demodulator (MCD). The MCD is instrumental in allowing FDMAEDM access schemes which optimize the use of on-board and ground resources in VSAT networks. This paper deals with the analogue and digital implementations of MCD, trying to assess the fields of application of each of the two technologies. KEY WORDS Multicarrier demodulator SAW devices Digital on-board processing *Now with Space Engineering 91, Via Dei Berio, 00155 Rome, Italy link. Further baseband switching is made possible, opening the avenue to the implementation of complex on-board processing functions.An example of the utility of the MCD is given by the 'mobile satellite communications' service, where there are, on one side, mobile users and, on the other, a few earth-stations (gateways to existing terrestrial network).