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Clearwire Corporation (CLWRD) Message Board

  • indano indano Nov 20, 2011 2:08 PM Flag

    CLWR says LS is f'd up

    http://fjallfoss.fcc.gov/ecfs/document/view?id=7021692145
    LightSquared "Live Sky" Test Results
    Las Vegas - May 16 through May 27, 2011
    This report provides a synopsis of impacts to the Clearwire commercial system in Las Vegas measured during LightSquared’s "Live Sky" BTS testing that took place from May 16 to May 27, 2011.
    A. EXECUTIVE SUMMARY
    1. LightSquared’s "Live Sky" test of GPS interference in Las Vegas caused a Clearwire base station co-located with a LightSquared base station to lose GPS link; the site shut itself down automatically to prevent interference to the rest of the market.
    2. The test plan was designed to answer whether significant GPS interference will result from LightSquared’s operation—which was demonstrated conclusively. Clearwire would have to replace GPS antenna across its nationwide network, which would potentially entail 15,000-20,000 new GPS antennae, and the considerable logistics and cost this would involve.
    3. LightSquared position on payment for mitigation of GPS interference they will cause is at odds with the plain language of the MSS ATC regulation at 47 CFR §25.255; this regulation requires the MSS ATC entrant "must resolve any such interference. If the MSS ATC operator claims to have resolved the interference and other operators claim that interference has not been resolved, then the parties to the dispute may petition the Commission for a resolution of their claims." Thus far, LightSquared has said it is unwilling to pay for mitigation of harm to commercial terrestrial networks.
    4. The test was not sufficient to ascertain what mitigation measures would be adequate to reduce or eliminate harm to GPS caused by LightSquared’s operations. The tests failed to accurately depict a real world environment because the tests were underpowered, intermittent, and with inadequate site density. To determine the true degree of GPS interference or whether mitigation measures will be adequate, it will be necessary to have an interference test which reflects real-world deployment conditions before it can be determined whether co-existence with GPS is possible in the upper or lower band of LightSquared’s spectrum.
    5. The recently proposed power "reduction" by LightSquared may be at or above the levels where interference was demonstrated in Las Vegas.
    6. Even with LightSquared’s proposed power reduction and its decision to initially deploy using lower band spectrum, additional testing is necessary because preliminary tests show a strong probability of interference from the lower band for several classes of devices, especially if the power reduction is accompanied by greater cell density.

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      • 1 Reply to jameslansdowne
      • Thanks!
        Looks like the turkey on our tables will be from LS Farms, a big bird, juicy and tasty but never could fly!

        "Once this timeline and the current attitude of key people in government is understood, it becomes evident how truly dire LightSquared’s prospects are. Simply put, there is now no chance whatsoever that there will be any positive ruling from the FCC (or even an end to the testing, which can be prolonged almost indefinitely if the government insists on testing LightSquared devices as well – indeed the FAA presented a timeline yesterday with potentially multiple stages of further testing, including handsets, beginning in the Spring of 2012), and it is simply a question of wondering when the money all runs out."

    • CLWR knows about PIM.
      PIM is the INTERMOD INTERFERENCE YOU CAN'T FILTER.
      Falcone bought into technology he didn't understand. He should have followed Buffett's Rule - don't invest in stuff you don't understand. CLWR spectrum is worth $16B to $20B. That's all an investor needs to know!
      "This slide demonstrates a possible “3rd Order” Passive Intermodulation product that could be generated from at any dissimilar metal junction on a rooftop or tower and radiate into our GPS receiver, interfering with the weak satellite signal."

 

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