ACSSB land mobile earth station
Abstract
This paper describes the performance of the land mobile earth station using the Amplitude Companded Single Sideband (ACSSB) modulation technique developed for mobile satellite communications and results of the field experiments which were conducted in rural, suburban, and urban areas. This ACSSB system uses a 3-kHz pilot tone, and the voice frequency band is from 300 to 2500 Hz. The experiments show that the required C/N0 for voice communications is 40 dBHz and the required C/N0 for pilot signal tracking is 34 dBHz. Voice quality in rural and suburban areas was degraded slightly. In urban areas shadowings due to the presence of large buildings and trees caused signal losses. A comparison of the ACSSB system with the conventional narrow-band frequency-modulation system indicates that the ACSSB system can transmit voice signals more efficiently.
- Publication:
-
Communications Research Laboratory Review
- Pub Date:
- March 1990
- Bibcode:
- 1990CRLRv..36...83T
- Keywords:
-
- Ground Stations;
- Mobile Communication Systems;
- Satellite Communication;
- Single Sideband Transmission;
- Voice Communication;
- Cities;
- Frequency Modulation;
- Japanese Space Program;
- Rural Areas;
- Signal Detection;
- Signal Fading;
- Suburban Areas;
- Communications and Radar