Title :
Doppler measurement and compensation in mobile satellite communications systems
Author_Institution :
Hughes Network Syst. Inc., Germantown, MD, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
The frequency errors dominated by the dynamic Doppler is analyzed for mobile satellite communication systems employing fast-moving satellites. Methods are proposed and analyzed for the basestations to measure and compensate the dynamic Doppler of large range. It is shown that the proposed methods give the minimum uncertainty of the dynamic Doppler for the modem to handle. Therefore, these methods are optimal for frequency synchronization and Doppler measurement in mobile satellite communications systems
Keywords :
Doppler measurement; mobile satellite communication; synchronisation; CDMA; TDMA/FDMA; basestations; control channel; dynamic Doppler compensation; dynamic Doppler measurement; fast-moving satellites; frequency errors; frequency synchronization; minimum uncertainty; mobile satellite communications systems; modem; optimal methods; Artificial satellites; Bandwidth; Demodulation; Doppler measurements; Low earth orbit satellites; Modems; Radio frequency; Satellite broadcasting; Satellite communication; Time division multiple access;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822695
