Transcript FIXED WIRELESS ACCESS -- DEVELOPMENTS IN THE USA

ULTRA-WIDEBAND (UWB)
A POSSIBLE AREA FOR
STANDARDS
BILL LUTHER
FEDERAL 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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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
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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 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
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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
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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
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Part 15 = -41.3 dBm/MHz
U.S. LIMITS
-75.3 dBm/MHz
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Part 15 = -41.3 dBm/MHz
-75.3 dBm/MHz
U.S. LIMITS
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Preliminary
DIFFERENCE IS 34 dB
34 dB
Part 15 = -41.3 dBm/MHz
1.91 GHz
3.1 GHz
10.6 GHz
-75.3 dBm/MHz
960 MHz 1.61 GHz
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10 dB Stronger
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
-65.3 dBm/MHz
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20 dB Stronger
Part 15 = -41.3 dBm/MHz
U.S. LIMITS
-53.3 dBm/MHz
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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 STUDIES
CONTINUE
 MEASUREMENTS OF MARKETED
DEVICES
 OPERATION OF LOW PRF SYSTEMS
(VEHICULAR RADARS)
 FREQUENCY HOPPING RADARS
 CONCERNS OF INTERFERENCE
INCLUDING AGGREGATE EFFECTS
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