Rocket M with BaseStation Sectors for NLOS

[tamahome]

Hello since MIMO uses dual antennas and cross polarity would it perform better in nlos scenarios?

I´m having a very seriuos interference issue in my zone, I couldnt get more than 200 stable kbps in a Near Line of Sight 2.4Ghz, 20Mhz at 2.5km.

For a backhaul to that repeater I currently have SR9 with 8db Hyperlink omni and SR9 with 15db Grid Hyperlink and its failing the last couple of days.
Today Im trying to change both SR9 with XR9 and a Yagi 13db where the omni was to get less interference and maybe more stability againts the 15db grid.
If this doenst work either I don't know where to turn, 5.8 its imposbile and 2.4 did't work.

My last option would be some Alvarion PtP equipment wich I am waiting reply about the price and capabilities from the supplier. Im sure it would be expensive.

Any advise would be much apreciated.

[WHT]

Hello since MIMO uses dual antennas and cross polarity would it perform better in nlos scenarios? Yes, there would be *some* improvement; but its not going to be a "magic bullet" that solves all non-LOS problems.

[tamahome]

and in LOS scenarios where Im having also troubles using 802.11b/g Would it be significant improvement?

[WHT]

That all depends why you are having difficulty. It its interference, it may or may not be an improvement.

[Valus]

I'm in a Situation like you are however my whole operations as a WISP is based on NLoS situations. Have pockets of trees ranging from 10-75ft tall all over the place and different types do due peoples crops and just natural tree growth. And terrain elavation differse so much within a 30mile radius, from 10-100ft elavation differences so trees end up becoming tall out in the distance.

i've tried allot of stuff too. So far the only equipment that i've purchased to have worked is Using Tranzeo With Wifiplus antennas, a TR-902 attached to a Wifiplus WFP0200517 Antenna, then roughly 2 miles away going thru several differnt types of Trees same setup and i'm able to get a pretty good signal(client wise 1.5Mb/1.5Mb, for my testing around 5Mb-10Mb+).

For me the 900Mhz Range is Ideal, however until ubnt Decides to make 900Mhz range equipment(not the do-it-yourself stuff like what your using) I'll have to continue to try and find alternatives because the price is not resonable .

What would be nice if ubnt could come out with some Airmax stuff but in the 900Mhz range and i would be set, 2.4Ghz(over saturation) is not really an option and 5.8(less saturated) blows in regards to obstruction penatration, not to mention the antenna's are 2-4x as much for the type that i would need to buy.

def go with H-Pol over V-pol, my experince with NLoS is that V-Pol tends to blow more compared to H-Pol in regards to penatration and less utilized to since majority of stuff is V-Pol anyways. also i find sectors to be able to propogate better around and thru obstacles then using directional.

[drwho17]

We've been doing Wimax testing with 2nd order setups on the tower, while the CPE has 1 antenna. When enabling the 2nd antenna in the cluster at the tower, I can see 10-15 db different signal reading on the client. Unfortunately the Alvarion CPE's are only SISO, but the 2nd antenna is killer for increasing signal. I'm hoping to see a similar boost with Ubiquity gear, I figure an extra 12 db hotter with MIMO then without.

[davey]

We've been doing Wimax testing with 2nd order setups on the tower, while the CPE has 1 antenna. When enabling the 2nd antenna in the cluster at the tower, I can see 10-15 db different signal reading on the client. Unfortunately the Alvarion CPE's are only SISO, but the 2nd antenna is killer for increasing signal. I'm hoping to see a similar boost with Ubiquity gear, I figure an extra 12 db hotter with MIMO then without.

drwho17, does the Alvarion gear use a similar method for diversity as the Ubiquiti, i.e. channel-bonding onto an adjacent channel and cross-polarising, or do they use some other method? Other than increasing gain, how does it help in terms of throughput?

[tamahome]

I'm having inteference issues in 2.4Ghz becuase there are a lot of WISP in the area also some factories.

I wonder if TDMA and cross polarization can avoid the issues in my area.

Im not in the same scenario as Valus but I would love make nlos at 2.4 as I have some, specially for backhauls as I don't have towers or tall buildings to mount repeaters.

If TDMA have at least some sort of inmunity to noises and interference I would consider making my next Repeater a MIMO with rocket as Nano-N worth almost the same as nanos.