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FCC Implies that GPS Receiver Performance Needs Fixing

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Replying to:  Suprisingly Realistic Attitude by crood   Feb 15, 2012, 9:53 AM

Re: Suprisingly Realistic Attitude

by dlmjr    Feb 15, 2012, 11:58 AM

crood said:
There was simply no way the changes required could/would be implemented in a time frame that would have allowed Lightsquared to operate. On one level, they were screwed because the whole fiasco should never have been allowed to get this far. Being "technically" right in no way eliminates the realities of the situation. The GPS devices were there first and are of critical importance. Changing them to not bleed over would take time and cost a lot of money.

The more logical solution would be tighter rules on how they use spectrum going forward and allow attrition and software patches to take care of the issue. Given time, that will then make the adjoining spectrum usable.


GPS doesn't bleed over. The LS spectrum band does to a certain aspect and coupled with the fact that gps devices were designed for a quiet nook of the spectrum, the problem arose.

It's almost physically impossible to engineer transmitters that have zero possibility of bleed over, even if all the components remain at factory spec and never deteriorate.

At present, LS should not be allowed to utilize the spectrum.

Going forward, yes, newer gps devices should be designed with greater rejection parameters, but there is no 'software' fix for all of those millions of current devices, it's a hardware fix.

I have no concern if citizen kanes TomTom goes gaga occasionally, they do it anyway.
But to require the other critical industries to spend millions of dollars, including our own Military to accomodate LS is asking a little much.

As the devices die and need replacement is the time to remedy the problem.

As such, LS is screwed, as they most possibly will run out of money before it can be solved. But the problem was of their own making and they should have done preliminary tests prior to going forward.

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