400mhz至177ghz之间的频谱资源评估航空移动业务

FREDRICKMATOS U.S.DEPARTMENTOFCOMMERCEMalcoim Baldrige, Secretary DavidJ.Markey,AssistantSecretaryforCommunicationsandInformation SEPTEMBER1984 Page.ABSTRACT.viSECTION 1INTRODUCTION.1BACKGROUND.1OBJECTIVES.2APPROACH.2SECTION 2CONCLUSIONS AND RECOMMENDATIONS4GENERAL CONCLUSIONS4'SPECIFIC CONCLUSIONS4Technical Standards8.RECOMMENDATIONS8SECTION3RULES AND REGULATIONS10REGULATORY OVERVIEW10ALLOCATIONS10UNIQUEREGULATORYASPECTS10Area Frequency Coordination10DEFINITIONS12TECHNICAL STANDARDS16Tolerance Categories16Standards Adequacy19SECTION-4SPECTRUM USAGE.20GENERAL20406.1-420MHzBAND20902-928 MHzBAND。231350-1400MHzBAND241429-1435MHzBAND.251435-1530MHzBAND.271530-1535MHzBAND.331710-1850MHZBAND.342200-2290 MHzBAND.372300-2310MHzBAND.392310-2390MHzBAND.404400-4990MHzBAND.4114.4-14.5 GHz BAND.4614.5-14.7145 GHz BAND4714.7145-15.1365GHzBAND.4815.1365-15.35GHzBAND50OTHERFREQUENCYBANDS51420-450 MHz Band - Position Location Reporting System(PLRS)..51960-1215MHzBandJointTacticalInformationDistributionSystem (JTIDS).519200-9300 MHz Band529.510.0GHzBand15.7-17.7 GHz Band.SUMMARY54 - Center Frequency: On-tune; fc = 0.01 x Rb70APPENDIX A:Excerpts from Table of Allocations.71APPENDIX B: Parts 7.18 and 7.19 of the NTIA Manual.90LIST OF TABLESTable12S/ I = 30 dB, 5 dB, -5 dB, -10 dB, -15 dB.5Mobile or Aeronautical Mobile Allocations in the UnitedStatesabove400MHzandBelow17.7GHz.113Spurious Emission and Frequency Tolerances17sufficient coded symbol errors to significantly degrade theforAirbornePurposes and Total Number of Assignments.215Frequency Band Assignment Statistics.226Bn: Null to null bandwidth of the desired signalChannelAssignments2678PRl: Pulse repetition interval31pulsed interference scenario evaluated (1 relatively shortinthe1710-1850 MHz Band。36 SECTION5IDENTIFICATIONOF PROBLEM AREASFORSTUDYPROBLEMASSESSMENTMATRIXPOTENTIAL PROBLEMS.MANAGEABLEPROBLEMSSECTION6SHARING ANALYSIS.GENERALSHARING CRITERIA.Receiver Sensitivity.Carrier-to-Interference Ratio(C/I)Digital Systems Criteria. LISTOFTABLES(CONTINUED) Typical Line-of-Sight Radio Relay Equipment intheBand4400-4990MHz.4310Typical Tropospheric Scatter Equipment in theBand4400-4990MHz.4311Typical Aeronautical Mobile Systems in the Band4400-4990MHz4413Typical Data Link Budget Equation64 LISTOFFIGURES Figure variableEs/NoiscalculatedwithEquation6-4,whereNis thetotal noise-likepower (including theArea Frequency Coordination Responsibility.13Anynoise-likeinterferencepowerissimplyassumed tobeadded (inmW)tothenoisepower.ForGeographic Distribution of Government Assignmentsinthe1435-1530MHzBand29ofA;and2"valuesofB,wheremisan integer:Thus,thevalueofMmightbe(2)(2)=l6,(2)Federal Government Frequency Assignment Distributiorinthe1435-1530MHzBand.30beemployed to reducetherequired bandwidth of thetransmitted signal.Usually,there are2"valuesHatched Areas Represent Coastal Exclusion Areasfor Airborne Telemetry (1530-1535 MHz)..35567Problem Assessment Matrix for the 4400-4900 MHz Band56Typical Digital SystemPerformance Curves60GA FET Power Output Versus Frequency.62Thus,itfollowsfromEquation6-14thatfornoiseandnoise-likeinterference,theBERforaQAMTypical Troposcatter and Aircraft Coupling Geometry66 INTRODUCTION BACKGROUND The National Telecommunications and InformationAdministration (NTIA)isresponsible for managing the radio spectrumallocated.to the U.S. FederalGovernment.Part.ofNTIA'Sresponsibilityisto...establishpoliciesconcerning spectrum assignment,allocationand.use,andprovide the variousDepartmentsandagencieswithguidancetoensurethattheirconductoftelecommunications activities isconsistent withthese policies" (Department ofCommerce，1978).In support of these requirements, NTIA has undertaken a numberof spectrum resource assessments.The objectives of these studies areto assessspectrum. utilization,identifyexistingorpotentialcompatibilityprobiemsbetween systems of various departments and agencies, provide recommendations forresolving any compatibility conflicts, and recommend changes to improve spectrummanagement procedures. This report presents a study of the Aeronautical Mobile Service between400 MHz and 17.7 GHz, which addresseslong-range planning issues.Thesystemsoperating under theAeronautical MobileServiceallocation or under the moregeneral Mobile Service allocation,.butusedinboth.groundandaeronauticalenvironments,generally provide nonvoicecommunicationsand are usually referredtoas telemetry, data, video, or command links.Typical.applications are at testranges where data is telemetered fron a device undergoingteststoacentralcontrol or data recording area.Another applicationismilitaryoperations intactical scenarios where information concerningthestatusofasystem orexternally coilected information is transmittedovercomnunicationschannel,anormallyreferred to as a data link. Emerging technologies such as spread spectrum modulation and packet radioarein the future. Some of this technology is being used in the multifunction typesof systems that providevoicecommunicationsin di