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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