From the article is appears that there is a resolution on the table a portion of what spectrum LS has licensed. If that is in fact the case, it would seem the FCC could grant approval in the particular frequency range that the filters work, the only question being will the FCC basically tell the GPS community that LS already had been granted these frequencies and that GPS community knowingly encroached and therefore will have to pay to resolve a problem of their own doing...
I can see the GPS companies not wanting to have to cover these costs but it will be interesting to see how this all plays out and if a LS approval would mean and immediate large hit to CLWR stock or not especially in the light that LS has already signed a bunch of small customers whereas CLWR has virtually none other than Sprint which appears to believe their bottom line would be best served if they owned and maintained their own network (LTE).
The article does not produce a real world solution.
They address fundamental frequencies only. Those of us skilled in the art know better.
The problem, which cannot be "filtered", is the creation of intermodulation products at the antenna. Telecom hardware is not hermetic and is subject to degradation with time. Degradation leads to passive intermod products. This dog will only hunt once.
Good "real world" article
Passive intermodulation (PIM) is the distortion generated by the small nonlinear characteristics of passive RF components such as antennas and connectors. Passive nonlinearity is almost always a small effect, typically resulting in mixing products more than 100 dB down from the generating signal, which is usually insignificant compared to the levels of nonlinear distortion generated by active circuit components such as amplifiers. However, the large intermodulation products created in active components can usually be eliminated by filtering. PIM distortion cannot always be eliminated by filtering because it is generated by components that occur after the filter in the transmit path of the system. Thus, PIM is often the dominant source of nonlinear distortion in high powered systems. As a result of the great difference in power between transmitted and receive signals in a communication system, passive intermodulation distortion levels as low as -150 dBc are potentially problematic sources of interference in many systems as the nonlinearity of passive components causes power at transmit frequencies to mix into the system’s receive band. Passive intermodulation is most problematic in transmit/receive systems where transmit and receive bands are closely spaced. Communication frequency bands are becoming more densely populated, making passive intermodulation a growing concern in the wireless community.
After looking at this linked website I realized that there is Javad link and LS Watch link... I wonder if there is a bias in this guys reporting or does he truly believe that LS and Javad is the future...
Stansell closed the panel discussion by saying, “I think we learned, thanks to Javad, about a very clever solution to a particular problem for a particular range of products—the products he is most familiar with,” he said. “It may or may not fit in some of the other applications. What we have not addressed is sort of the elephant in the living room. That is the cost, and time delay, and changeover process if LightSquared is allowed to go forward. Will it be the lower 10, upper 10? That has to be resolved. There are very large questions remaining to be discussed, and [they] may or may not be fully solved in a short period of time."