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