Title: UK Ultra Wide Band (UWB) Compatibility Study
1UK Ultra Wide Band (UWB)
Compatibility Study
Andy Gowans Bharat Dudhia UK
Radiocommunications Agency
2UWB 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
3UWB 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
4Compatibility 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.
5FCC UWB emissions limits for indoor communication
and measurement systems. Units with center
frequencies greater than 3.1 GHz
6FCC UWB emissions limits for outdoor
communication and measurement handheld systems.
Units with center frequencies greater than 3.1 GHz
7Proposed CEPT emissions limits for indoor and
outdoor UWB communication and measurement
systems.
8UWB 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)
9UWB 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
10UWB 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
11UWB 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
12UWB 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
13UWB 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
14UWB 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)
15UWB 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
16UWB 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
17UWB 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
18Summary
- 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
19CEPT compatibility study in progress PT SE24
-provisional results this includes aggregate
interference analysis for a no.of devices