Attachment ex parte

ex parte

Ex PARTE PRESENTATION NOTIFICATION LETTER submitted by MSV

exparte

2005-11-17

This document pretains to SAT-MOD-20051104-00212 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2005110400212_466977

DUPLICATE eveecnmommc Tore ressaser Tebgetbe nssime jury mniumatsesmm . — dwop w Priman.. Received November 17, 2005 BroceD.tacoin nind inceseobi@pilitepteecon Via Hand Delivery RECEIVED Ms. Marlene H. Dortch, Secretary Federal Communications Commission NOV 1 7 2005 445 12th Street, S.W. redual Comuntatens connison Washington, D.C. 20554 Re: Mobile Satellite Ventures Subsidiary LLC Application for Modification of License to Operate ATC File No. SAT—MOD—20051104—00212 File No. SAT—MOD—20051104—00211 File No. SES—MOD—20051110—01561 Dear Ms. Dortch: On November 15, 2005, Peter Karabinis, Senior Vie President and Chief Technical Officer ofMobile Satellite Ventures Subsidiary LLC (*MSV"); and Bruce Jacobs and David Konezal ofPilisbury Winthrop Shaw Pittman LLP, counsel for MSV; met with William Bell, Richard Engleman, Howard Gribof®, Andrea Kelly, Karl Kensinger, Scott Kotler, Kathym Medley, Robert Nelson, and Sean O‘More ofthe International Bureau regarding MSV‘s above—referenced application for modification of its icense to operate an Ancillary Terrestrial Component ("ATC®). In adition to discussing the document attached hereto, MSV elaborated on the public interest benefits of the waivers it is secking, which are discussed on pages 9—11 ofthe Technical Appendix of the application. Among other things, the requested base station waivers will minimize the cost and complexity of deploying an ATC network, meaning ATC can be deployed more expeditiously and at ess cost. The requested waiver pertaining to the EIRP of user devices will afford MSV additional fexibility thatis important to offering new and innovative services. Please direct any questions regarding this matter to the undersigned. muy Very yours, Bmce I‘cobs D.

Ms. Marlene H. Dortch November 17, 2005 Page2 ce William Bell Richard Engleman Howard Gribof® Andrea Kelly Karl Kensinger Scott Kottler Kathym MedJey Robert Nelson Sean O‘More

MSV‘s APPLICATION FOR MODIFICATION OF AUTHORITY TO OPERATE AN ANCILLARY TERRESTRIAL COMPONENT Fundamental Relationship LetP; and B; denote the EIRP (Watts) and the bandwidth (He) of a carrier,respectively, of a first protocol(eg., GSM).. The EIRP spectral density (Le., the equivalent isotropic radiated power spectral density, "PSD") ofthe carrier may be expressed as: 10tog (P/B;) = 10tlog (P)) — 10#log (B;); dBWIHz 0) Let P; and B3 denote the EIRP (Watts) and the bandwidth (Hz) of a carier, respectively, of a second protocal (eg., edma2000). The EIRP spectral density associated with M second carriers, ach radiating the same EIRP, P», can be expressed as: 10tlog [M*(P;/B;)] = 10tlog (M) + 10tlog (?.) — 10tlog (B;); dBW/kiz (2) Equating equation (1) to equation (2) and solving for M; we find: y = 1 000te 4) 10tog (22)+ 10tlog (B)— 10tiog (B))10 ® Application: Let us assumethat 10log (P;)= 0 dBW and 10tlog (B;) = 53 dBHz as may be the case for a GSM retum link carrier (200 kz bandwidth and EIRP = 1 Watt. For a second protocol let us assume 10*log (P»)=—6 dBW (Le., EIRP = 0.25 Watts) and a carrier bandwidth of 1.25 MHz; thatis, 10*log (B;)= 61 dBHz, as may be the case for a retum link edma2000 carrier radiating one code. Substituting these values into equation (3)above we find: M = 1000+ 6+ 6!—5300 2. 1 p(4}10 2. 95 This means that the PSD potential that may be generated by a fully—loaded return link GSM carrier (al eight ime slots loaded) is indistinguishable from the PSD potential that may be generated by 25 edmme2000 retur link carriers each radiating one code or by one edmma2000 retur link carrier radiating 25 codes (cach at —6 dBW EIRP).


Document Created: 2005-11-22 15:05:35
Document Modified: 2005-11-22 15:05:35
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