The generation and analysis of a hand-made plan for satellite broadcasting are described. The plan is intended as an example of what could be achieved within any band which may be allocated for wide-band high definition TV (HDTV) at a forthcoming World Administrative Radio Conference. It is shown that the whole of such a band could be used by every country simultaneously, each country being assigned an orbit location and the use of one or the other hand of polarization, provided digital modulation is used with receiving antennas of sufficient directivity. As a guide, 0.9 m at 17 GHz or 0.7 m at 22 GHz appear to be adequate receiving-antenna diameters as far as controlling interference is concerned. Use of digital modulation in this way makes more efficient usage of spectrum than analogue modulation, offering more programs per country per MHz of allocated band. It also permits greater flexibility of exploitation of the band.
NASA STI/Recon Technical Report N
- Pub Date:
- High Definition Television;
- Position (Location);
- Communications and Radar