UK Ultra Wide Band (UWB) Compatibility Study

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UK Ultra Wide Band (UWB)


Compatibility Study
Andy Gowans Bharat Dudhia UK
Radiocommunications Agency

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UWB Compatibility Study CEPT PT SE24

• CEPT PT SE24 UWB Study
• To investigate the interference potential of
  various Pulsed UWB technology on existing and
  planned services
• Laboratory measurements and theoretical
  calculations.
• UWB Interference and victim receiver bandwidth
• Noise - like (Receiver BW lt UWB PRF)
• Pulse - like (Receiver BW gt UWB PRF)
• UWB Signal characteristics for Interference
  tests
• PRF (1/5/10 MHz)
• Modulation type gt PPM

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UWB Compatibility Study CEPT PT SE24

• Victim Services
• Broadcast services (T-DAB / DVB-T)
• Radio Astronomy (Passive services)
• Earth Exploration Satellites (Active Passive)
• GPS
  
• UMTS
• Galileo
  
• PCN
  
• Aeronautical services
• COFDM ENG/OB
• SRDs
• 5GHz HIPERLAN

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Compatibility Study

• RA Contribution to CEPT
• To assess the UWB interference into
• (1) DVB-T
• (2) TDAB (MODE 1 2)
• (3) PCN (GSM)
• (4) Bluetooth
• (5) 5GHz RLAN
• Objectives
• (1) C/I Ratios (based on UWB power falling into
  victim receiver's IF BW)
• (2) Minimum separation distances
• (3) Maximum permissible E.I.R.P. for UWB
• (4) Compare results with use of proposed CEPT and
  EMC/FCC limits.

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FCC UWB emissions limits for indoor communication
and measurement systems. Units with center
frequencies greater than 3.1 GHz
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FCC UWB emissions limits for outdoor
communication and measurement handheld systems.
Units with center frequencies greater than 3.1 GHz
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Proposed CEPT emissions limits for indoor and
outdoor UWB communication and measurement
systems.
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UWB Interference into DVB-T (1)

• Digital Terrestrial TV
• COFDM (multi carrier modulation) - 2k 8k FFT
• QPSK - 16QAM - 64QAM
• 2/3 FEC
• 1/32 Guard interval
• 7.61 MHz BW
• UK Mode (2k FFT, 64 QAM, 2/3 FEC, 1/32 Guard
  Interval)
• Conducted Measurements
• Objective measurements (BER tests)
• Failure criteria - BER of 2x10-4 (before RS
  decoder)

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UWB Interference into DVB-T (2)

• C/I Results
• 6.5 dB (QPSK)
• 11.6 dB (16 QAM)
• 19.4 dB (64 QAM)
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 33.31m 10.5
  3
• Proposed CEPT Mask 0.01m 0m

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UWB Interference into DAB (1)

• Terrestrial Digital Audio Broadcasting
• Design for fixed, portable and mobile reception
• ETSI Standard (EN 300 401)
• COFDM - DQPSK
• 1.5 MHz BW
• 5/6 Near CD quality Programs per Block
• Receiver Sensitivity -81dBm - (CENELEC
  standard)
• -90dBm
  (typical receiver performance)
• Frequency allocations VHF (band 3) (217-230
  MHz)
• 
  L band (1.5GHz)
• Failure criteria - subjective listening test

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UWB Interference into DAB (2)

• C/I Results
• 9.6 - 12.5 dB
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 22 m
  7 m
• Proposed CEPT Mask
  lt1m lt1m

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UWB Interference into Bluetooth (1)

• A global standard for wireless connectivity
• connecting mobile phones, computers,
  laptops,
• Low Power - Low Cost radio links (Voice and Data
  )
• Technology
• 2400 - 2483.5 MHz ISM Band gt ETS 300 328
• Fast Frequency Hopping system
• over 79 channels - 1MHz spacing
• 625µs timeslot
• pseudo random hopping sequences
• frequency separation at least 6MHz
• Time division duplex (TDD)
• Failure Criteria - Voice (subjective listening),
  BER, file transfer time

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UWB Interference into Bluetooth (2)

• C/I Results
• 17 dB (Voice)
• 19 dB (data-file transfer test)
• 20 dB (BER Tests)
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 2.6 m
  0.8 m
• Proposed CEPT Mask
  lt1m lt1m

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UWB Interference into PCN/GSM (1)

• 2nd Generation Pan European Cellular
  System
• GSM (800MHz) / PCN (1800 MHz)
• GFSK, 270kb/s,
• TDMA (8 user per channel)
• Receiver Sensitivity (-102 dBm)
• Conducted Measurements
• GSM test set
• C/I Measurements
• Failure Criteria (mobile station receive quality
  4 with traffic channel BER 2)

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UWB Interference into GSM (2)

• C/I Results
• 9 dB
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 41 m
  13 m
• Proposed CEPT Mask
  lt1m lt1m

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UWB Interference into PCN (3)

• C/I Results
• 9 dB
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 21 m
  6.6 m
• Proposed CEPT Mask
  lt1m lt1m

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UWB Interference 5GHZ RLAN

• C/I Results (dB)
• 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps
  36Mbps 54Mbps
• BPSK 1/2 BPSK 3/4 QPSK 1/2 QPSK 3/4 16QAM
  1/2 16QAM 3/4 64QAM 3/4
• 6 9 9
  10 13 24
  26
• Protection Distances (SE24 Calculations)
• UWB emission level
  MUS MUS10dB
• EMC/FCC Part 15 limit (-41dBm/MHz) 5.67m 1.79
  m
• Proposed CEPT Mask 5.67m 1.79m
• Failure criteria - 10 Frame Error Rate

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Summary

• CEPT compatibility study in progress
• Pulsed UWB-PPM gtgt Noise like interference
• UWB emission level
• EMC/Part 15 limit (-41dBm/MHz) gtgtSharing under
  worst case scenario may not be possible
  (DVB-T/PCN/TDAB/Bluetooth)
• Proposed CEPT (SE24) mask gtgt Separation distance
  lt1m apart from 5GHz RLANs.
• Effect of different UWB-PRF (1/5/10 MHz) gtgt 2-3
  dB
• Further Measurements
• UWB/3G
• ITU-R Task Group 1/8

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CEPT compatibility study in progress PT SE24
-provisional results this includes aggregate
interference analysis for a no.of devices