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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 pro-active 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
Up-linker Company Registry
actively collecting up-link registrant companies Interference Incident Logging
actively collecting interference incident data Certified Trained Operator Registry
(under development)
Tools on SUIRG Web site
Training & Certification Program Review & Certify Sat Ops Training Establish Certification Sat. Ops. DB
Interference Source Identifier 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
On-going Programs
New users in C-band downlinks
Future mobile phone networks(IMT Advanced, 4G, ….)
Broadband Wireless Access (BWA), WiMax, FWA, ….
Is Is beingbeing considered by ITU considered by ITUIs currently being introduced country Is currently being introduced country by country worldwideby country worldwide
BWA or IMT in ANY part of “our” C-band downlink will have an impact on FSS reception in ALL of the band
Band commonly used by FSS satellitesAdditional band
(FSS, feeder links for MSS, …)
3.43.4 3.53.5 3.63.6 3.73.7 3.83.8 3.93.9 4.04.0 4.14.1 4.24.2Std. CStd. CExtended CExtended C
Unwanted Emission Levels
BWA band
Signals appear at the input of the LNB with a much higher power density than the satellite signals
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
Why: Provide additional quantifiable data for administrations and other interested organizations
When: Tentative August/September 2007
SUIRG Field Testing
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
Satellite Receiver
WiMAX Device
Spectrum Analyser
Receive Satellite Antenna
Base Station
Video Monitor
Base Antenna height >100'Down angle 10 degreesHPBW Horz 60 degreesHPBW Vert 10 degrees
17 dBi GainMax EIRP 38dBm
X-distance
Subscriber Station
Subscriber Antenna height >10'HPBW Horz 18 degreesHPBW Vert 18 degrees
18 dBi Gain
Y-distance
Test Horn
Typical Test Configuration
Transmission ParametersBS 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
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
Test Program
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’s Future
2007 SUIRG Interference Conference/Meeting 27-29 November 2007 Hong Kong Hosted by AsiaSat $500 non-member attendance fee
SUIRG Update
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