James S. Washburn, Gregory R. Hand, Leslie A. Berry, and Jeanne M. Ratzloff

Abstract: The minimum amount of spectrum to satisfy worldwide broadcasting requirements in the high–frequency (HF) bands is estimated. This analysis provides technical bases for the U.S. allocation proposal$ being developed in preparations for the World Administrative Radio Conferences (WARCs) to be held in 1992 and 1993. The analysis applies the ITS–developed HF spectrum use model (HFSTJM) software to compute the minimum number of channels to assure specified levels of broadcast quality for both the existing double-sideband (DSB) and the proposed compatible single-sideband (SSB) systems. HFSUM produces definitive results for the existing DSB systems and for the spectrum needs of the proposed compatible SSB systems. The results obtained in this analysis indicate that 1) the existing DSB system needs approximately three to four times as much HF spectrum as that currently allocated to broadcasting; 2) the proposed compatible SSB system needs approximately two to three times the currently allocated spectrum; and 3) there exists a good likelihood that time–sharing of the HF bands between broadcast and nonbroadcast services is feasible.

Keywords: IFRB; WARC for HF Broadcasting; HFSUM; likelihood estimates for time-sharing; limited reallocation WARC; minimum amount of HF spectrum required

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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