美国58505925mhz和相邻5ghz频谱的测量占用率

Frank H. Sanders U.S. DEPARTMENT OF COMMERCEWilliam M. Daley, Secretary Gregory L. Rohde, Assistant Secretaryfor Communications and Information December 1999 This Page Intentionally Left Blank PREFACE Thisreport was sponsored by the Federal Highway Administration(FHWA),McLean,Virginia,under the direction of J.A.Arnold,FHWA Contracting Officer TechnicalRepresentative.Institutefor Telecommunication Sciences personnel who used suitcasemeasurement systems to acquire data presented in this report were Jeanne Ratzloff, CharlieSamora, Michael Terada, and John Ewan. Certain commercial companies, equipment, instruments, and materials are identified in thisreport to specify adequately the technical aspects of the reported results.In no case doessuchidentificationimplyrecommendationorendorsementbytheNationalTelecommunications and Information Administration, nor does it imply that the material orequipment identified is necessarily the best available for the applications described. This Page Intentionally Left Blank CONTENTS PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii 1.1Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21.2Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.3Interpretation and Extrapolation of 5-GHz Band OccupancyMeasurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2.U.S. ALLOCATIONS AND ASSIGNMENTS BETWEEN 5850-5925 MHz. . . .52.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2.2National Allocation Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . .52.3Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 3.5250-5925 MHz BROADBAND SPECTRUM SURVEY RESULTS. . . . . . . . .103.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 3.2Denver, Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103.3San Diego, California. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123.4Los Angeles, California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153.5Summary of Broadband Spectrum Survey Results. . . . . . . . . . . .17 4.HIGH-POWER RADAR INCIDENT FIELD STRENGTHS BETWEEN5850-5925 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.2In-band Radar Maximum Measured Incident Field Strengths. . . . .184.3Spurious Radar Maximum Measured Incident Field Strengths. . . .194.4Summary of Radar Maximum Measured Field Strengths5850-5925 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.5Anticipated Future U.S. Radar Development in 5-GHz Spectrum . .22 5.FIXED SATELLITE SERVICE MEASURED INCIDENT FIELD STRENGTHS .245.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 5.2Measurement Description and Results . . . . . . . . . . . . . . . . . . . . .245.3Summary of Fixed Satellite Service Measurements . . . . . . . . . . . .25 6.CONCLUSIONS AND RECOMMENDATIONS. . . . . . . . . . . . . . . . . . . . . . .27 7.REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 CONTENTS(Continued) FIGURES Figure 1.U.S. locations with high-power radars in the 5850-5925 MHz spectrum. . .9Figure 2.NTIA spectrum survey graph summarizing 26 scans across the5250-5925 MHz range at Denver, CO, 1993. . . . . . . . . . . . . . . . . . . . . . .11Figure 3.NTIA spectrum survey graph summarizing 34,800 sweeps across the2300-2500 MHz range at Denver, CO, 1993. . . . . . . . . . . . . . . . . . . . . . .13Figure 4.NTIA spectrum survey graph summarizing 22 scans across the5250-5925 MHz range at San Diego, CA, 1995.. . . . . . . . . . . . . . . . . . .14Figure 5.NTIA spectrum survey graph summarizing 35 scans across the5250-5925 MHz range at Los Angeles, CA, 1995.. . . . . . . . . . . . . . . . . .16Figure 6.Block diagram of NTIA Radio Spectrum Measurement System (RSMS)radar spectrum measurement configuration.. . . . . . . . . . . . . . . . . . . . . . .19Figure 7.RIR-778C radar spectrum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Figure 8.Variation in received pulse shapes as a function of tuned frequency in anextended radar emission spectrum.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Figure 9.Incident field strength as a function of distance from the Mt. Jackson fixedsatellite service (FSS) earth station.. . . . . . . . . . . . . . . . . . . . . . . . . . . .26 TABLES United States Frequency Allocations 5250-5925 MHz.. . . . . . . . . . . . . . . . 6 This Page Intentionally Left Blank EXECUTIVE SUMMARY IntelligentTransportation Systems(ITS),utilizing dedicated short