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ULTRA-WIDEBAND (UWB) A POSSIBLE AREA FOR
STANDARDS
BILL LUTHERFEDERAL COMMUNICATIONS COMMISSION
WASHINGTON, D.C.2003
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ULTRA-WIDEBAND ISSUES
INTRODUCTION APPLICATIONS WHAT IS UWB? DECISIONS EMISSION STANDARDS REGULATIONS INTERFERENCE CONCERNS STUDIES
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INTRODUCTIONUWB 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
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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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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
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FRACTIONAL BANDWIDTH
FRACTIONAL BW = 2(Fh - Fl)/(Fh + Fl)
WHERE
Fh = HIGHEST FREQUENCY LIMIT WITH SIGNAL 10 dB BELOW PEAK EMISSION
Fl = LOWEST FREQUENCY LIMIT WITH SIGNAL 10 dB BELOW PEAK EMISSION
Fc = CENTER FREQUENCY = (Fh + Fl)/2
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UWB MONOCYCLE TIME AND FREQUENCY
DOMAINS
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FCC DECISIONSFEBRUARY 14, 2002: FCC GAVE UWBREGULATORY STATUS AFTER - EXHAUSTIVE NPRM EXTENSIVE CONSULTATIONS
WITH THE U.S. DOD NEGOTIATIONS WITH
DEPARTMENT OF COMMERCE (NTIA), AND OTHER AGENCIES
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FCC DECISIONSJULY 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
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FCC DECISIONSFEBRUARY 13, 2003: ON RECON FCC
AGAIN AFFIRMED ITS UWB REGULATIONS WHILE CLARIFYING FURTHER -
LIMITS AND OPERATION OF GPRAND WALL IMAGING SYSTEMS
COORDINATION REQUIREMENTS EMISSION LIMITS PRODUCED BY UWB
CIRCUITS
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-75.3 dBm/MHz
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
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-75.3 dBm/MHz
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
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960 MHz 1.61 GHz
1.91 GHz
3.1 GHz 10.6 GHz
Preliminary
DIFFERENCE IS 34 dB
34 d
B
Part 15 = -41.3 dBm/MHz
-75.3 dBm/MHz
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-65.3 dBm/MHz
10 dB Stronger
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
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-53.3 dBm/MHz
20 dB Stronger
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
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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
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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.
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STUDIES
UWB TASK GROUP 1/8 MEETS
NEXT IN GENEVA,
SWITZERLAND
OCTOBER 27 - 31, 2003
(MONDAY – FRIDAY)
(STUDIES ARE UNDERWAY AND CONTROVERSIAL)
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FCC UWB STUDIESCONTINUE
MEASUREMENTS OF MARKETED DEVICES
OPERATION OF LOW PRF SYSTEMS (VEHICULAR RADARS)
FREQUENCY HOPPING RADARS CONCERNS OF INTERFERENCE
INCLUDING AGGREGATE EFFECTS