UK Ultra Wide Band (UWB) Compatibility Study - PowerPoint PPT Presentation

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UK Ultra Wide Band (UWB) Compatibility Study

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Title: UK Ultra Wide Band (UWB) Compatibility Study


1
UK Ultra Wide Band (UWB)


Compatibility Study
Andy Gowans Bharat Dudhia UK
Radiocommunications Agency

2
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

3
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

4
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.

5
FCC UWB emissions limits for indoor communication
and measurement systems. Units with center
frequencies greater than 3.1 GHz
6
FCC UWB emissions limits for outdoor
communication and measurement handheld systems.
Units with center frequencies greater than 3.1 GHz
7
Proposed CEPT emissions limits for indoor and
outdoor UWB communication and measurement
systems.
8
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)

9
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

10
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

11
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

12
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

13
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

14
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)

15
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

16
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

17
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

18
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

19
CEPT compatibility study in progress PT SE24
-provisional results this includes aggregate
interference analysis for a no.of devices
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