Title :
A flexible digital multicarrier modulator for multi-frequency TDMA satellite transmission
Author :
Ventura-Traveset, J. ; Bella, L. ; Bessai, H. ; Hofmann, G.
Author_Institution :
ESA-ESTEC, Noordwijk, Netherlands
Abstract :
The implementation and test of a flexible digital multi-frequency time division multiple access (MF-TDMA) modulator are presented. The modulator is able to work at several frequencies (frequency hopping) on a burst basis without preambles or guardtimes. After a brief review of some satellite concepts (e.g., MF-TDMA, onboard processor, and traffic efficiency), direct-in-band modulation is introduced as the technique selected for the digital design of this frequency hopping modulator. A mixed Si/GaAs technology has been chosen for the hardware implementation and some tests are presented to show the good performance of the device
Keywords :
frequency agility; modulators; satellite relay systems; time division multiple access; GaAs; Si; direct-in-band modulation; flexible digital multicarrier modulator; frequency hopping modulator; hardware implementation; multifrequency TDMA satellite transmission; Costs; Digital modulation; Frequency; Gallium arsenide; Laboratories; Prototypes; Satellite communication; Satellite ground stations; Testing; Time division multiple access;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188437
