A STUDY OF MARITIME MOBILE SATELLITE SERVICE REQUIREMENTS, FREQUENCY PLANNING MODULATION AND INTERFERENCE ANALYSIS. VOLUME IV. FREQUENCY MANAGEMENT AND INTERFERENCE ANALYSIS.
The study report develops equipment characteristics for VHF maritime mobile space and terrestrial (ship and coast station), land mobile (vehicle and base station), narrow and wideband fixed and TV broadcast services and for all proposed 1600 MHz systems such as the Aeronautical Satellite, Collision Avoidance System, ILS/Guide Slope System and a hypothetical Maritime Satellite System. Both space/earth and terrestrial propagation paths and associated attenuations are evaluated and then interference analyses are conducted for all interference paths (i.e. all interacting transmitter/receiver pairs). Tables are presented for both 160 MHz (VHF) and 1600 MHz (UHF) protection ratios between the desired and interfering signals, and graphs are presented of the protection distances for the same quantities over terrestrial paths. The feasibility of co-channel, interleaved channel and adjacent channel space/terrestrial sharing is calculated for all services in both frequency bands. The suitability of the 1970 U.S. proposals to the 1971 Space World Administrative Radio Conference (WARC) for the maritime mobile space services in Band 8 (156-162 MHz) and Band 9 (1535-1660 MHz) are commented upon in terms of spectrum adequacy (RF bandwidth availability) and in terms of interference potential. Recommendations are made with respect to Band 9 transmitter spurious emission design constraints.
Automated Marine International500 Newport Center Drive
Newport Beach, CA United States
- Templeton, Lawrence W
- Middlebrook, Don G
- Heckert, Gerald P
- Mendoza, Barry A
- Publication Date: 1970-10-15
- Pagination: 249 p.
- TRT Terms: Communication systems; Communications satellites; Radio; Satellite communication
- Subject Areas: Marine Transportation; Operations and Traffic Management;
- Accession Number: 00015313
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: Final Rpt
- Contract Numbers: DOT-CG-00505A(IV), DOT-CG-00505-A
- Files: TRIS
- Created Date: May 13 1973 12:00AM