Positioning determination and communications using two geostationary satellites
Abstract
A hybrid satellite communication system has been developed which can provide both communications and positioning services in one system using two geostationary satellites. The experimental system consists of the ETS-V (150 deg E) and INMARSAT (180 deg E), a base earth station (Kashima Space Research Center, Japan), and mobile earth stations. The frequencies between the satellites and mobile stations are 1.6/1.5 GHz. The distinctive feature of this system is that position determination of the mobile earth stations and communication, such as voice and data transmission, can be carried out over the same channel at the same time. Another feature is that the frequency bandwidth of the system is very narrow compared to those of GPS and GEOSTAR. The two types of terminals developed for the experiments with this hybrid system use the single channel per carrier method and the spread spectrum method. An outline of the experimental system is presented, and the estimated positioning accuracy is described.
- Publication:
-
Communications Research Laboratory Journal
- Pub Date:
- July 1992
- Bibcode:
- 1992CRLJ...38..249M
- Keywords:
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- Domestic Satellite Communications Systems;
- Mobile Communication Systems;
- Positioning;
- Satellite Tracking;
- Single Channel Per Carrier Transmission;
- Synchronous Satellites;
- Satellite Orbits;
- Thermal Noise;
- Voice Communication;
- Space Communications, Spacecraft Communications, Command and Tracking