LightSquared Wants To Share Weather-Balloon Frequencies for LTE
IDG News Service reports (as carried by PC World) that LightSquared, having lost some of the spectrum they'd hoped to use for a nationwide LTE network because of worries it would interfere with GPS service, has a new plan: to use some of the spectrum currently reserved by the federal government for uses like weather-balloon communications. From the article: "The new plan would give the carrier 30MHz of frequencies on which to operate the LTE network. That's 10MHz less than it had wanted but still comparable to the amount of spectrum Verizon Wireless and AT&T are using for their LTE systems, which in most areas use just 20MHz. Wireless network speeds are determined partly by how much spectrum the network uses, so LightSquared might be able to deliver a competitive service for its planned coverage area of 260 million U.S. residents."
Just don't know when to fold.
[The Universe] has gone offline.
Second verse, same as the first. LightSquared just doesn't want to pay for spectrum. First they tried muscling in on satellite frequencies, claiming to the FCC that they'd primarily be satellite-based while telling everyone else that they'd be terrestrial only. And of course, they got caught because pretty much *any* terrestrial-strength broadcast is going to swamp out any satellite-based stuff on the same frequencies.
So now they're trying it again, trying to squeeze in on some pre-established frequencies. I don't claim to know any technical details of weather-balloon communication, but I do know this: if it *were* possible to safely share those frequencies with LTE-like communications, it would likely have been done already. Given their prior track record, LS is going to have to argue pretty effectively to convince me.
Look, LightSquared. You should've just paid for actual spectrum you could use before. You acted like a cheap bastard and tried to use the wrong parts because it was cheaper, and then you cried when it didn't work.
I suspect the request to "share" frequencies with weather balloon transmitters has less to do with available bandwidth and more to do with a relative lack of industry who will be able to stand up this time to object. Weather balloons typically transmit at less than 300 milliwatts. If they couldn't figure out how to keep their land based-transmitters from overpowering 50 watt gps signals, I don't see how high-altitude balloons signals will fare any better.
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And also, Why would Weather-Balloons need that much frequency juice in the first place ?
Its older, cheaper, disposable tech. Might only be 400 baud downlink but usually a pretty wide signal. Simple FM/FSK modulation maybe. The problem is you launch 10 to different altitudes, due to frequency drift from being cold (cheap, remember?) you might find that a struggle to make them all fit without interfering with each other. On a boring fall day you don't launch 10 at a time, but for all I know in a hurricane (literally) you might drop 10 at a time.
Congress already told NOAA to stop using the bottom half or so of the band. The problem is radio allocations are done by the ITU... This is the usual american arrogance problem where it turns out the FCC only regulates inside the US. If someone in Canada wants to launch at 1770 MHz, which is well within ITU regulations, short of bombing the Canadian weather station I'm not sure what they intend to do about it. Just accept the interference I guess.
Also the 1700 MHz band has coprimary with radiosondes and met satellites. The weather satellite people are going to be pissed if their frequencies are reallocated only over the USA.
"Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
Here is yet another hair brained scheme to use a public resource on the cheap for private profit. Who needs accurate weather forecasts and severe storm warnings when we could let yet another carrier overcharge us for wireless bandwidth?
Another cloud computing business model.
You don't realise how cheap the sondes are. There are hundreds launched every day, and they don't get them back. They have to be incredibly cheap and there are no GSM technologies cheaper than a simple FM radio.
There are technical limitations too - GSM only works up to about 5km, above that they will likely fail. Sondes usually fly to about 30km.