1 ULTRA-WIDEBAND (UWB) A POSSIBLE AREA FOR STANDARDS BILL LUTHER FEDERAL COMMUNICATIONS COMMISSION WASHINGTON, D.C. 2003

2 ULTRA-WIDEBAND ISSUES  INTRODUCTION  APPLICATIONS  WHAT IS UWB?  DECISIONS  EMISSION STANDARDS  REGULATIONS  INTERFERENCE CONCERNS  STUDIES

3 INTRODUCTION  UWB TECHNOLOGY HAS BEEN IN LIMITED USE FOR YEARS BY PUBLIC SERVICE, RESEARCH, AND MILITARY AGENCIES, PRIMARILY FOR IMAGING AND RADAR (PROBABLY GLOBALLY)  CONSUMER UWB DEVICES ARE BEING DEVELOPED FOR WIRELESS COMMUNICATIONS AND OTHER APPLICATIONS, AND COULD BECOME WIDESPREAD

4 PROPOSED APPLICATIONS  GROUND-PENETRATING RADARS (PUBLIC SAFETY, ARCHEOLOGICAL, CIVIL ENGINEERING, EARTHQUAKE, etc.)  THROUGH-WALL RADAR FOR PUBLIC SAFETY AND CONSTRUCTION  EMERGENCY MOTION AND IMAGING  HIGH-PERFORMANCE MICROPHONES  LOCAL AREA VOICE, DATA, AND VIDEO NETWORKS  SECURITY DEVICES  COLLISION AVOIDANCE AND AIRBAG SENSORS  FLUID LEVEL DETECTION  SHORT-RANGE CLANDESTINE COMMUNICATIONS  LONG-RANGE MILITARY COMMUNICATIONS  IDENTIFICATION AND LOCATION TAGS UNLICENSED AND COULD BECOME UBIQUITOUS IN THE UNITED STATES

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7 WHAT IS UWB? UWB SIGNAL DEFINITION:  THE FRACTIONAL BANDWIDTH IS GREATER THAN 20% OF THE CENTER FREQUENCY, OR  THE -10 DB BANDWIDTH OCCUPIES 500 MHz OR MORE OF SPECTRUM

8 FRACTIONAL BANDWIDTH FRACTIONAL BW = 2(F h - F l )/(F h + F l ) WHERE F h = HIGHEST FREQUENCY LIMIT WITH SIGNAL 10 dB BELOW PEAK EMISSION F l = LOWEST FREQUENCY LIMIT WITH SIGNAL 10 dB BELOW PEAK EMISSION F c = CENTER FREQUENCY = (F h + F l )/2

9 UWB MONOCYCLE TIME AND FREQUENCY DOMAINS

10 FCC DECISIONS FEBRUARY 14, 2002: FCC GAVE UWB REGULATORY STATUS AFTER -  EXHAUSTIVE NPRM  EXTENSIVE CONSULTATIONS WITH THE U.S. DOD  NEGOTIATIONS WITH DEPARTMENT OF COMMERCE (NTIA), AND OTHER AGENCIES

11 FCC DECISIONS JULY 12, 2002: FCC CLARIFIED -  GROUND PENETRATING RADAR (GPR) AND WALL IMAGING WAIVER AND REGISTRATION RULES  ACCOMMODATION OF EXISTING DEVICES WHILE ENSURING THAT AUTHORIZED RADIO SERVICES ARE PROTECTED FROM HARMFUL INTERFERENCE

12 FCC DECISIONS FEBRUARY 13, 2003: ON RECON FCC AGAIN AFFIRMED ITS UWB REGULATIONS WHILE CLARIFYING FURTHER -  LIMITS AND OPERATION OF GPR AND WALL IMAGING SYSTEMS  COORDINATION REQUIREMENTS  EMISSION LIMITS PRODUCED BY UWB CIRCUITS

dBm/MHz Part 15 = dBm/MHz U.S. LIMITS

dBm/MHz Part 15 = dBm/MHz U.S. LIMITS

MHz1.61 GHz 1.91 GHz 3.1 GHz 10.6 GHz Preliminary DIFFERENCE IS 34 dB 34 dB Part 15 = dBm/MHz dBm/MHz

dBm/MHz 10 dB Stronger Part 15 = dBm/MHz U.S. LIMITS

dBm/MHz 20 dB Stronger Part 15 = dBm/MHz U.S. LIMITS

18 REGULATIONS  WITHIN THE U.S. CODE OF FEDERAL REGULATIONS: (TITLE 47 – TELECOMMUNICATIONS), FCC PART 15, “RADIO FREQUENCY DEVICES,” SUBPART F – UWB OPERATION  WITHIN THE INTERNATIONAL TELECOMMUNICATION UNION RADIO REGULATIONS: (ARTICLE 4 – ASSIGNMENT AND USE OF FREQUENCIES), PARAGRAPH 4.4

19 STUDIES UWB IS UNDER STUDY WITHIN THE ITU-RADIOCOMMUNICATION SECTOR’S SPECTRUM MANAGEMENT GROUP WHICH HAS CREATED ITU-WIDE TASK GROUP (TG) 1/8 FOR THAT PURPOSE TG 1/8 will coordinate its own studies as well as those received from other groups within the ITU.

20 STUDIES UWB TASK GROUP 1/8 MEETS NEXT IN GENEVA, SWITZERLAND OCTOBER , 2003 (MONDAY – FRIDAY) (STUDIES ARE UNDERWAY AND CONTROVERSIAL)

21 FCC UWB STUDIES CONTINUE  MEASUREMENTS OF MARKETED DEVICES  OPERATION OF LOW PRF SYSTEMS (VEHICULAR RADARS)  FREQUENCY HOPPING RADARS  CONCERNS OF INTERFERENCE INCLUDING AGGREGATE EFFECTS