SBE Frequency Coordination at 2GHz

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SBE Frequency Coordinationat 2GHz

• El Segundo, California
• November 8, 2006

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SBE Representatives

• Chriss Scherer
• President
• Ray Benedict
• Immediate Past President
• Ralph Beaver
• Chairman, Frequency Coordination Committee
• Dane Ericksen
• Chairman, FCC Liaison Committee
• Christopher Imlay
• General Counsel
• John Poray
• Executive Director

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Meeting Objectives

• Outline the SBE frequency coordination process
• Detail how broadcasters use 2GHz spectrum
• Review complexities of coordination issues
• Identify implementation procedures

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Typical Electronic News Gathering (ENG) Hardware
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Typical ENG Hardware
Steerable ENG receive antennas
Saddle Peak Los Angeles County
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Typical ENG Hardware
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Typical ENG Hardware
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Typical ENG Hardware
Graphic courtesy of MRC
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Typical ENG Hardware
Graphics courtesy of MRC
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Typical Antenna Specs
Graphic courtesy of MRC
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Typical Antenna Specs
Antennas
Graphic courtesy of MRC
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2GHz ENG Channel Plan
Frequencies expressed in MHz
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ENG Usage Categories

• Category I Los Angeles
• Extremely heavy use, mostly split-channel
• Heavy itinerant use
• Channel borrowing and sharing
• Category II Metro
• Heavy use, especially during news hours
• Some split-channel and itinerant use
• Regular channel borrowing and sharing
• Category III Light
• Some ENG, some fixed link
• Frequent channel vacancies
• Typically small-market, low-competition
  situations
• Category IV Rural
• Rare ENG use
• Fixed, long-haul relays are common
• Some channels not used in some areas

Source ET Docket 95-18 Second RO
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DoD Uplinks andENG Usage Categories

• NSCN, Laguna Peak (Los Angeles) Category I
• Buckley AFB (Denver) Category I
• Camp Parks (SF Bay Area) Category I
• New Boston AFS (Boston metro) Category I
• Cape Canaveral (Orlando) Category II
• Kirtland AFB (Albuquerque) Category II
• Schriever AFB (Colorado Springs) Category II
• Vandenberg AFB (Lompoc) Category II
• NSCN, Prospect Harbor, ME Category III
• Hawaii Tracking Station Category III
• Anderson AFB (Guam) Category IV

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ENG Usage Categories

• Even rare ENG use can instantly change from
  rare to intensive use due to a major news event.
• Jessica Lunsford murder
• California wildfires
• Beltway Sniper threat
• Exxon Valdez spill
• Oklahoma City bombing
• Waco, TX, incident

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Interference Criteria

• Receiver threshold degradation
• No more than 0.5 dB
• Established limits
• The Oct. 21, 2004, ET 00-258 Seventh RO,
  footnote 63, used a 0.5 dB threshold degradation
  interference criteria.

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Interference Calculations

• Assume no polarization rejection
• ENG uses HPOL, VPOL, RHCPOL and LHCPOL
• Interference calculations
• Based on maximum DoD uplink power
• Assumptions
• Use free-space path loss (FSPL) unless terrain
  obstruction to ENG receive-only (ENG-RO) is
  demonstrated
• No ENG-RO receive antenna rejection

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Interference Calculations

• Assumptions
• Co-channel operation
• Unified S-Band (USB-1) and Space Ground Link
  System (SGLS) each occupy 10 MHz

Source On the Power Spectral Density of SGLS and
USB Waveforms C. Wang, T. Nguve and J. Yoh The
Aerospace Corp.
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Interference Considerations

• Frequency of ENG use
• News events happen at anytime, at any location
• Time sharing
• Not possible or practical
• Acceptable use
• Apply frequency re-use criteria of TSB-10F,
  modified to the 0.5 dB criteria in the ET 00-258
  Seventh RO
• Prohibit frequency sharing

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Mobile Receive Sites

• Noninterference protection
• Verification possible for fixed ENG-RO sites
• Verification impossible for mobile ENG relay
  andS-ENG trucks

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ENG and Homeland Security

• ENG as an information provider
• Provide information to public
• Flow of information avoids public panic
• News source to government officials
• News source to general public

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Questions?