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Author Topic: FCC 600MHz Auction Update  (Read 8386 times)

Scott Holtzman

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Re: FCC 600MHz Auction Update
« Reply #10 on: May 03, 2016, 01:44:35 pm »

much spectrum as possible because that means more tx/rx frequencies, which means fewer devices on each frequency, which translates to higher throughput and faster speeds right per device, right?

It hasn't worked this way for a long time.  There is no concept of channels in spread spectrum.  It's all about occupied bandwidth.  The spreading algorithm distributes the energy across the available spectrum.  Each communication is started with the exchange of a seed number that begins the pseudo-random sequence.  The remote device looks for a bit of data at that moment in time space.  That is how the bitstream is recovered.  Cell splitting is for capacity (less energy per cell = more subscribers) not for RF management in the classic sense.

Devices still think in terms of bands because of antenna, filters etc.

Mr. Google found this for me, a great introduction to spread spectrum.  I learned something, it was designed by a musician.  Which makes perfect sense as music is the ultimate spreading algorithm and the aesthetic being the prime driver.

https://www.maximintegrated.com/en/app-notes/index.mvp/id/1890

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Scott AKA "Skyking" Holtzman

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Diogo Nunes Pereira

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Re: FCC 600MHz Auction Update
« Reply #11 on: May 03, 2016, 06:07:43 pm »

I learned something, it was designed by a musician.  Which makes perfect sense as music is the ultimate spreading algorithm and the aesthetic being the prime driver.

https://www.maximintegrated.com/en/app-notes/index.mvp/id/1890

And wonderful Hedy Lamarr, hands on the piano keys... the whole story is a thing of beauty.

Great article by the way. Still not quite grasping how you can recover an RF message below the noise floor ???

Quote
Without the right key, the spread-spectrum signal appears as noise or as an interferer. (Scanning methods can break the code, however, if the key is short.) Even better, signal levels can be below the noise floor, because the spreading operation reduces the spectral density. See Figure 6. (Total energy is the same, but it is widely spread in frequency.) The message is thus made invisible, an effect that is particularly strong with the direct-sequence spread-spectrum (DSSS) technique. (DSSS is discussed in greater detail below.) Other receivers cannot "see" the transmission; they only register a slight increase in the overall noise level!

Still, and again, a thing of beauty.

D
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David Buckley

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Re: FCC 600MHz Auction Update
« Reply #12 on: May 03, 2016, 08:12:39 pm »

Still not quite grasping how you can recover an RF message below the noise floor ???

Yeah, I don't really get this either, but GPS does it all the time.  I'm suspecting black magic is involved.
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Tim McCulloch

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Re: FCC 600MHz Auction Update
« Reply #13 on: May 03, 2016, 11:44:06 pm »

Yeah, I don't really get this either, but GPS does it all the time.  I'm suspecting black magic is involved.

Gray magic.

Black Magic is some video company. ;)
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Henry Cohen

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Re: FCC 600MHz Auction Update
« Reply #14 on: May 31, 2016, 04:10:17 pm »

It's May 31st and that means along with recuperating from the weekend's festivities/jobs, the FCC Reverse Auction started at 10:00am EST this morning. As of the conclusion of Round 1 at 4:00pm EST, no broadcasters who are participating in the auction have offered to sell out a price less than the market capitalization amount assigned their license. And why would they, at least this early in the game. My prediction is eBay-style sniping (though in reverse) during the last round or two.

For those of you who want to watch this daily soap opera at home: https://auctiondata.fcc.gov/public/projects/1000
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Andrew Outlaw

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Re: FCC 600MHz Auction Update
« Reply #15 on: June 01, 2016, 09:17:45 am »

For those of you who want to watch this daily soap opera at home: https://auctiondata.fcc.gov/public/projects/1000

Thanks for the link!
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Philip Roberts

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Re: FCC 600MHz Auction Update
« Reply #16 on: June 01, 2016, 12:54:13 pm »

For those of you who want to watch this daily soap opera at home: https://auctiondata.fcc.gov/public/projects/1000
Is there something at this link that I'm not seeing? It appears to me just to have the schedule of the various rounds but no other information.

Thanks

Philip
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Dan Mortensen

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Re: FCC 600MHz Auction Update
« Reply #17 on: July 28, 2016, 04:24:04 pm »

This came in today from the Shure rep:


"FCC Chairman Tom Wheeler acknowledged the government agency may need to conduct further reverse auction stages should forward auction bidding not meet the current $86 billion clearing target. Those additional stages could result in less spectrum being transitioned from television broadcasters to mobile telecom operators.


http://www.rcrwireless.com/rcrtv/verizon-sprint-att-results-dissected-carrier-wrap-episode-37-tag2
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Karl Winkler

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Re: FCC 600MHz Auction Update
« Reply #18 on: July 29, 2016, 05:23:51 pm »

This came in today from the Shure rep:


"FCC Chairman Tom Wheeler acknowledged the government agency may need to conduct further reverse auction stages should forward auction bidding not meet the current $86 billion clearing target. Those additional stages could result in less spectrum being transitioned from television broadcasters to mobile telecom operators.


http://www.rcrwireless.com/rcrtv/verizon-sprint-att-results-dissected-carrier-wrap-episode-37-tag2

Saw that - this is good news at the very least in terms of time frame, and perhaps even in terms of how much spectrum is re-claimed.
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ProSoundWeb Community

Re: FCC 600MHz Auction Update
« Reply #18 on: July 29, 2016, 05:23:51 pm »


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