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Les_Slater
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Re: Beam forming phased array antennas
Les_Slater   1/15/2014 10:00:29 AM
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My response to Rick was the short answer. It pertained to the relatively near future, and only when such beam forming might be necessary, and available. As far as I know there is presently no beam forming deployed that would have to know target position to any great accuracy.

As you mention, there will be adjuncts to GPS going forward, one of them being WiFi. But if WiFi were available it would make more sense to use it for data, including VoIP. Of course, handovers and tarrifing would have to be worked out.

KB3001
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Re: Beam forming phased array antennas
KB3001   1/15/2014 9:13:48 AM
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GPS is not adequate for indoor positioning - cellular, Wifi etc. can help with that. There is a lot of research on fusion of GPS, Cellular, Wifi etc. data for better positioning (and related services) indoors and outdoors. Lots of money to be made for the winners there...

KB3001
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Re: MMwave airport scanners
KB3001   1/15/2014 9:10:09 AM
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The latest scanners at airports use Tera-Hertz technology i.e. sub-milimeter waves.

KB3001
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Re: 39 GHz in your smartphone
KB3001   1/15/2014 9:03:31 AM
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Oh we do, krisi. Just imagine if we could move most of the computing power towards the cloud with very thin cheap and standard clients. Higher bandwidth would allow for that, and you can imagine that the sky is the limit in this case.

Circar123
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Re: Beam forming phased array antennas
Circar123   1/14/2014 1:44:49 AM
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Thank you very much for your reply, It's really helpful for us.

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Les_Slater
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Re: Beam forming phased array antennas
Les_Slater   1/13/2014 2:50:21 PM
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I think present GPS would be sufficient to get significant gain from realatively simple beam forming. In general though GPS is not sufficient for other uses and will at least have to be supplemented. Auto navigation needs much better accuracy, down to location within a lane for instance.

What works at the mobile level is not what's important. There will need to be much added to infrastructure to support much that is evolving. Certainly location precision is part of that. Mobile will able to meet this as the need evolves.

If and when synthetic aperatures start being used then target position accuracy would become much more important.

krisi
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Re: 39 GHz in your smartphone
krisi   1/13/2014 2:20:48 PM
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thank you Rick...I think max LTE rate is 100 Mb/s when moving and 1 Gb/s when stationary...but this is the theory or lab at the best

we always say we need more bandwidth, but do we really need it? what for?...we don't eat more (well, some do and get obese), we don't drink more (well some do and need attend AA meetings later), we don't drive faster (the cars drive as fast as 50 years ago) and we probably have no more sex than i the past (I am guessing here ;-)...do we truly need to have more wireless bandwidth? Kris

rick merritt
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MMwave airport scanners
rick merritt   1/13/2014 2:11:13 PM
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Does anyone know what freq the airport security scanners use? Who makes the chips? Is there any biz or tech traction here leveraging this small but existing market?

I suppose mmwave in campus point-to-point nets is even bigger, eh?

rick merritt
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Re: 39 GHz in your smartphone
rick merritt   1/13/2014 2:08:13 PM
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@Kris: I don't know max LTE rates now or in future--does anyone else?

5G is still being defined. You know the drill, we always need faster, faster. I suspect folks will try to get a couple Gigs with mmwave, though increasingly capacoty is more importnat than throughput IMHO

rick merritt
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Re: Beam forming phased array antennas
rick merritt   1/13/2014 2:02:50 PM
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@Les: How good does the location accuracy need to be for beam forming? Is GPS the answer or -- if not -- what works and fits into mobile power/size constraints?

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