电力线宽带bpl报告第二阶段第二卷技术附录

Phase 2 Study VOLUME II NTIA Report 08-450 POTENTIAL INTERFERENCE FROM BROADBAND OVERPOWER LINE (BPL) SYSTEMS TO FEDERAL GOVERNMENTRADIOCOMMUNICATION SYSTEMS AT 1.7 - 80 MHz Phase 2 Study VOLUME II James C. RichardsJonathan V. Williams U.S. Department of CommerceCarlos M. Gutierrez, SecretaryJohn M. R. Kneuer, Assistant Secretary for Communications and Information October 2007 VOLUME IITABLE OF CONTENTS TECHNICAL APPENDICES TABLE OF CONTENTS ……………………………………………………….......iiiGLOSSARY ………………………………………………………………………...ivAPPENDIX AANTENNA MEASUREMENT HEIGHTA.1Introduction ……………………………………………………...A-1A.2Height of Peak Field Strength …………………………………...A-1A.3Compliance Measurement Height for Operation Between 1.7 –30 MHz ………………………………………………………….A-10A.4Compliance Measurement Height for Operation at 30 MHz andAbove ……………………………………………………………A-53A.5Height Correction Factor Above 30 MHz ……………………..A-62APPENDIX BMEASUREMENT DISTANCE ALONG THE POWER LINEB.1Introduction ……………………………………………………..B-1B.2Simulation Results ………………………………………………B-1APPENDIX CMEASUREMENT DISTANCE EXTRAPOLATIONC.1Introduction ……………………………………………………...C-1C.2BPL Field Strength Simulation Results ………………………....C-1C.2.1Extrapolated Field Strength Levels Meeting the Part 15 Limits ...C-1C.2.2Simulation Results ……………….……………………………...C-2APPENDIX DSPECIAL PROTECTION PROVISIONSD.1Excluded Frequency Bands ……………………………………...D-1D.2Exclusion Zones ……………………………...………………….D-2D.2.1Coast Stations ……………………………………………………D-2D.2.2Radioastronomy Observatories ………………………………….D-5D.3Consultation Areas ………………………………………………D-7 GLOSSARY AWGAmerican Wire GaugeBPLBroadband over Power Line(s)BWBandwidthCISPRInternational Special Committee on Radio InterferenceCONUSContinental United StatesCOTHENCustoms Over The Horizon Enforcement NetworkdBDecibeldBiDecibel referenced to an isotropic radiatordBmDecibel referenced to 1 milliwattdBμVDecibel referenced to 1 microvoltdBWDecibels referenced to 1 WattEElectric Field StrengthEMCElectromagnetic CompatibilityEUTEquipment Under TestFCCFederal Communications CommissionGGainGHzGigahertzHMagnetic Field StrengthHFHigh FrequencyHzHertzIInterference PowerICAOInternational Civil Aviation OrganizationIRACInterdepartment Radio Advisory CommitteeITMIrregular Terrain ModelITSInstitute for Telecommunication SciencesITUInternational Telecommunication UnionITU-RInternational Telecommunication Union Radiocommunication SectorkHzKilohertzkmKilometerLVLow VoltagemMeterMHzMegahertzmmmillimetermSSiemens/metermsMillisecondMVMedium VoltageNNoise PowerNECNumerical Electromagnetic CodeNOINotice of InquiryNPRMNotice of Proposed RulemakingNTIANational Telecommunications and Information AdministrationOROff-Route OTHOver the HorizonPFDPower Flux DensityPLCPower Line CommunicationsPLTPower Line TelecommunicationsRRouteRFRadio FrequencyRMSRoot Mean SquareRSMSRadio Spectrum Measurement SystemSSignal PowerSNRSignal-to-Noise RatioSSBSingle SidebandSSNSmoothed Sunspot NumberURDUnderground Residential DistributionUS&PUnited States and PossessionsUTCUniversal Coordinated TimeVHFVery High FrequencyVLAVery Large ArrayVOAVoice of AmericaVOACAPVoice of America Coverage Analysis ProgramWWattμAMicroampereμVMicrovolt APPENDIX AMEASUREMENT ANTENNA HEIGHT A.1INTRODUCTION Section A.2 describes NTIA’s Numerical Electromagnetics Code (NEC)simulation results showing the height where the peak field strength is expected in closeproximity to an Access Broadband over Power Line (BPL) system operating on overheadMedium Voltage (MV) power lines. Section A.3 shows the effectiveness of the 1 metermeasurement height in estimating the peak field strength at frequencies between 1.7 and30 MHz. Section A.4 provides results from simulations performed in the 30 – 50 MHzrange, using the 1 to 4 meter measurement height range defined in the compliancemeasurement guidelines for Access BPL systems operating above 30 MHz. In SectionA.5, the optional 5-dB height correction factor for measurements at a 1 meter height iscompared to the use of the 1 to 4 meter measurement height for the various power linesimulations at frequencies above 30 MHz. A.2HEIGHT OF PEAK FIELD STRENGTH Figures A-1 through A-18 show the heights where the peak electric field strengthoccurred over the frequency range of 2 to 50 MHz for the NEC power line modelsdescribed in Section 2.2. The height of the modeled power lines was 12 meters. Theseresults assume field strength values are calculated at a horizontal distance of 10 meters. A.3COMPLIANCE MEASUREMENT HEIGHT FOROPERATION BETWEEN 1.7 - 30 MHz The Federal Communication Commission (Commission or FCC) Part 15measurement guidelines specify that below 30 MHz, measurements are to be made withthe antenna positioned at a height of 1 meter. In Section A.2, the height corresponding tothe peak field strength was often located well above the 1 meter measurement height.The following plots show a comparison between the peak field strength determined fromthe measurement guidelines and the 80thpercentile o