They call it a "game changer", which I think it really will be. MT has to find a solution to this FAST, or MT-product operators will lose the battle for service in congested areas soon!
http://dl.ubnt.com/marketing/Tolly21312 ... rmance.pdf
http://blog.4gon.co.uk/4gon-interview-u ... he-future/
(read the section about multi-lan RF technology. All the rest is humbug or we can deal with it... )
Taken from their forum; (Robert. Its an open forum and I didn't find a disclaimer, so I'll presume its free to show it here....)
"Guys -- we will reveal more about multi-lane RF technology with time. It is a game changer. Here is the basic idea behind it:
For those of you who go as far back as the PRISM 2.5 chipset and 802.11b days, you might recall that those radios worked much better outdoors in noisy environments...one of the main reason is because the receiver had much better adjacent channel rejection characteristics. If you were operating on Channel 1 for example, the radio would largely tolerate strong co-located signals on Channels 6 and Channels 11.
Fast forward to todays' world of tighty integrated low-cost single chip CMOS zero-IF radios, one of the big weaknesses in these solutions is the poor selectivity and adjacent channel rejection performanc. If signals are relatively high, there is longer such a thing as non-overlapping channels. Even if an AP is on a clean Channel 1 for example, if there are reasonably strong interferers at Channel 6 or Channel 11, the receiver performance will start tanking.
You can't solve this by simply putting channel filters up front on the RF side. Why? Because the fractional Bandwidth of a 20MHz channel at 2.4gHz is too small and very hard to filter tightly unless you use a monster external cavity filter. And even then, the radio becomes locked to single channel operation. So what do you do?
Welcome to Multi-Lane RF Technology...
We put our own synthesizer in front that is tied to the Wifi radio and downconvert the carrier to a 374MHz intermediate frequency (the same IF the old PRISM 2.5 chipset used). By doing this, we have significantly increased the fractional bandwidth of the carrier to allow near brickwall filtering. After filtering, we upconvert the signal back in to the radio.
The results in the lab have been pretty exciting. With an added 30dB+ of adjacent channel rejection through this active filtering design, we are able to get 2-3x the performance in crowded environments. There is a lot more we are going to do with this technology in the coming year."
I hope MT will come up with something similar SOON. We should all start pressing them..... (sorry MT guys, but you do need a kick at times... )