if you have no available channels and lots of interference, no existing technology (for 802.11) will give you speeds above 100mbit.
I'm just saying that it's possible if your conditions are right:
http://forum.mikrotik.com/viewtopic.php ... 52#p218452
If they are very bad, I can't imagine how an improved protocol could help
To keep on topic: Having a second channel on another polarisation helps simple by
switching to it to reduce interference problems.
I see problems even with free channels but channels on the same band used.
Even with 60Mhz separation we suffer from interference. Using 11a with R52 this
is no problem but 11n with R52n is much more sensitive to signals on the same
An improved protocol can make the best out of bad conditions.
I see nstreme help a lot in good conditions but make things worse on bad conditions.
So I think there has to be done some work on the RF-Side and some work on nstreme
to make it more robust.