Sounds like their using something like BLAST (bell labs asyncronous space time). Where you can transmit multiple signal on the same frequence at the same.
As other posters have commented, turbo codes have been around along time. Any Digital Modulation Course will cover it.
Turbo Codes do have one major drawback... they add a huge delay into the data stream. It works by overlapping data on the same bit (sound implausible, but that's how it works), and it essence sends the same data several times. Turbo codes are used with some satellites, and add an extra 10-20 minutes delay to the communication, for satellites this isn't too bad... for cell phones this is dreadful.
When you email them you automatically add their address to your whitelist, or, you use a specially coded address as your envelope address. So their response will go directly to your inbox.
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Sounds like their using something like BLAST (bell labs asyncronous space time). Where you can transmit multiple signal on the same frequence at the same.
c dm a-pub/asil98_cdma_paper.pdf)
(http://www.bell-labs.com/org/wireless/1131k0/w
It uses the fact that signals bounce off walls and other object and ends up taking multiple paths to the receiver.
As other posters have commented, turbo codes have been around along time. Any Digital Modulation Course will cover it.
Turbo Codes do have one major drawback
When you email them you automatically add their address to your whitelist, or, you use a specially coded address as your envelope address. So their response will go directly to your inbox.
They don't have to sell the database, you can download it free of charge here from freedb.org