Spectrum Engineering

This report contains the results of an NTIA study concerning the use of the Earth exploration-satellite service (EESS) in the frequency range 8025-8400 MHz for Government, non-Government and international operations. The intent of this report was to compile the current and proposed, national and international, spectrum usage in the 8025-8400 MHz frequency range (including the lower adjacent-band, 7900-8025 MHz, and the upper adjacent- band, 8400-8450 MHz), to identify potential sharing issues, and summarize some options available to alleviate the interference interaction that might occur. This report is intended to be a resource document for examining specific EESS issues within the frequency range of 8025-8400 MHz.

The major objective of the measurements and tests performed at Bath was to determine the mechanism by which interference is occurring, and to recommend technically feasible solutions to the interference problem. Technical feasibility of a solution does not necessarily mean that the solution will be considered to be practical or desirable from a standpoint of cost or other non-technical considerations; it only means that the solution will work under the limits of known laws of physics and current state-of-the art knowledge of electrical engineering principles. Our purpose in performing the tasks at Bath, performing analysis of the data from Bath, and in writing this report is to set forth all possible technical solutions that meet these criteria. The parties to the interference problem may use these recommendations to attempt to resolve the interference problem on a technical basis.

On behalf of the Secretary of Commerce, the National Telecommunications and Information Administration (NTIA) has prepared this report as required by Title III ­ Communication and Spectrum Allocation Provisions ­ of the Balanced Budget Act of 1997 (Title III of the BBA 97). This report identifies radio spectrum currently used by the Federal Government for reallocation to the private sector.

Title III of the BBA 97 requires the Secretary of Commerce to provide from the spectrum currently allocated for Federal use, an aggregate of at least 20 megahertz (MHz) below 3 gigahertz (GHz) for allocation and assignment by the Federal Communications Commission (FCC) to non-Federal users through the process of competitive bidding.