Transcript Slide 1
SUIRG WiMax Activities
23 May 2007
Washington, DC
Agenda
SUIRG Background
SUIRG Programs
SUIRG’s WiMax Activities
SUIRG’s Future
SUIRG Background
SUIRG’s Mission
SUIRG is a not-for-profit international
assembly of parties, within which members
work towards the reduction of radio
frequency interference (RFI) through proactive programs and education.
Who Belongs
Membership grown to 33 members
Communication Satellite Operators
Satellite Service Users
Satellite Monitoring Equipment Vendors
Other Organizations concerned with Interference
Founding Members: Intelsat, PanAmSat, Inmarsat,
NewSkies, QinetiQ, Glowlink
Military oriented members: General Dynamics,
Aerospace Corp., Ball Aerospace & Tech, & MITRE
Tools on SUIRG Web site
Up-linker Company Registry
Interference Incident Logging
actively collecting up-link registrant companies
actively collecting interference incident data
Certified Trained Operator Registry
(under development)
On-going Programs
Training & Certification Program
Interference Source Identifier
Review & Certify Sat Ops Training
Establish Certification Sat. Ops. DB
Unique ID embedded in datastream
Interference Signature & Resolution DB
Regulatory WG
BWA shared usage of FSS C-band
Active participant in industry letter to EC
requesting non-approval at next ITU meeting
New users in C-band downlinks
Is currently being introduced country
by country worldwide
Is
3.5
3.6
Extended C
Additional band
(FSS, feeder links
for MSS, …)
3.7
considered by ITU
Future mobile phone networks
(IMT Advanced, 4G, ….)
Broadband Wireless Access
(BWA), WiMax, FWA, ….
3.4
being
3.8
3.9
4.0
Std. C
4.1
4.2
Band commonly used by FSS satellites
BWA or IMT in ANY part of “our” C-band downlink will have an impact on FSS
reception in ALL of the band
Unwanted Emission Levels
Signals appear at the
input of the LNB with a much
higher power density than the
satellite signals
BWA band
How much suppression of out-of-band components can one
realistically expect from BWA or IMT equipment?
Appendix 3 of the Radio Regulations provide limits for spurious emissions
SUIRG Field Testing
Why: Provide additional quantifiable
data for administrations and other
interested organizations
When: Tentative August/September
2007
Who will participate and/or contribute?
US Navy NAVSEA NSWCDD Q53 Section
SES-NewSkies
SES-Americom
Intelsat
AsiaSat
WiMax Forum
Others welcome
What will be tested?
Measure interference generated by
WiMax Base Station (BS) and Subscriber
Station (SS) transmissions into a satellite
receiving station by measuring satellite
channel C/N, BER and power levels
Typical Test Configuration
Subscriber Antenna height >10'
HPBW Horz 18 degrees
HPBW Vert 18 degrees
18 dBi Gain
Test Horn
Base Antenna height >100'
Down angle 10 degrees
HPBW Horz 60 degrees
HPBW Vert 10 degrees
17 dBi Gain
Max EIRP 38dBm
Receive
Satellite
Antenna
Y-distance
WiMAX
Device
X-distance
Satellite Receiver
Base Station
Subscriber
Station
Video Monitor
Spectrum Analyser
Transmission Parameters
BS Location
TBD
SS(1), SS(2) Location
TBD
BS Antenna Specifications
60 degree horizontal HPBW, 10 degree vertical
HPBW
Operational Frequency
3.4 – 3.6 GHz
Satellite / Orbital Location
TBD
Bandwidth
3.5MHz, 7MHz
Modulation Technique
QPSK, BPSK, 16QAM, 64QAM
Convolution Coding
Techniques (FEC)
½, 2/3, ¾
Center Channel Frequency
Resolution
1 kHz raster channel
Output Power (max)
21dBm
Test Program
Procedure will be verified and agreed upon by the
following organizations:
SUIRG: (Satellite Users Interference Reduction Group)
WBU-ISOG: (World Broadcasting Union – Inter Satellite
Operations Group)
GVF: Global VSAT Forum
WIMAX Industry (and associated Organisations)
CASBAA (Cable and Satellite Broadcasting Association of Asia)
NAVSEA NSWCDD Q53 (US Navy)
Test Program
Particular attention will be on the following:
Output level from the WIMAX transmitter.
Distance of the WIMX transmitter from the
Satellite antenna.
Angle of WIMAX transmitter from Satellite
antenna bore sight.
LNB signal compression
If required, testing will also be conducted
using different transmit frequencies from
the WIMAX transmitter.
Test Program
The entire testing process can be witnessed by any
interested party involved in the Satellite Industry.
All results will be made available within 15 days
following the conclusion of testing
The “TV Picture Quality” result will be based on the
following:
Grade 1: Excellent Broadcast quality
Grade 2: Occasional Blocking, poor BER
Grade 3: Frequent Blocking, Emergency Broadcasts only
Grade 4: Unusable
Test Program
Procedural steps A—J will be repeated upon the
insertion of the band pass filter
Spectrum Plots from the Analyzer will be taken at
every point during procedure using the following
settings:
Span: 100Mhz
RBW: 100Khz
VBW: 1Khz
5dB/div ( or a more applicable as deemed necessary during
the test)
Max hold or Video Averaging Techniques may be used if
deemed necessary
SUIRG’s Future
Do you have problems with satellite
interference?
Interference is a Quality of Service issue
Take a pro-active position to reduce
interference
If you support what SUIRG is doing then
please consider membership.
SUIRG Update
2007 SUIRG Interference
Conference/Meeting
27-29 November 2007
Hong Kong
Hosted by AsiaSat
$500 non-member attendance fee
Interested in SUIRG’s activities
Bob Ames ([email protected])
www.suirg.org
Sign-up for Interference e-News on
web site
SUIRG Fact sheet available