RF channel characteristics and enhanced performance in future DBS satellites at 12 GHz in region 2
Abstract
The usable bandwidth of each channel in the direct broadcast satellite (DBS) frequency plan is less than half that of the channels in the fixed satellite services (FSS) band. This implies that processing of DBS channels by multiplexing networks in the satellite would incur more than twice the loss and transmission deviations (relative to FSS channels) thereby reducing the effective bandwidth of such channels. This paper examines this and other tradeoffs by evaluating the overall channel performance in an operating satellite over continental U.S. (CONUS). It includes multipath effects and EIRP optimization over half and quarter CONUS coverage areas using single and dual-mode antenna configurations in conjunction with contiguous and noncontiguous multiplexing networks respectively. These tradeoffs provide a quantitative view of RF channel characteristics for the DBS frequency plan, available with the present state of filter and multiplexing technology.
- Publication:
-
11th Communication Satellite Systems Conference
- Pub Date:
- 1986
- Bibcode:
- 1986coss.conf..220K
- Keywords:
-
- Broadcasting;
- Channels (Data Transmission);
- Communication Satellites;
- Frequency Assignment;
- Superhigh Frequencies;
- Antenna Design;
- Multipath Transmission;
- Multiplexing;
- Satellite Television;
- Tradeoffs;
- Communications and Radar