Microwave Link : XPIC + 4096QAM

Hi
I'm just try collecting experiences from people here.

A lot of MW vendors is declaring today a 4096QAM modulation modem support but it is not clear if this highest modulation schemes can be applied in real case scenario in 1+0 only or also in XPIC

according to my knowledge could be (on paper) possible on:
HUAWEI: XMC3+950 IDU or RTN320
NEC: IPasolink VR + IAG ODU or IX
INFRACOM: OMIBAS OSDR
SIAE Microelettronica: ALFOplus2
DRAGONWAVE: Harmony MC (exist?)

who has tested or who is using a MW link with 4096QAM modulation in XPIC configuration?

Salam Simog,
4096Q mostly is being used for marketing purposes.Because a 4096Q link is not reliable because of high sensitivity to noise or usual issues on MW links.We have RTN XMC3 + ISM6 if boards which support 4096Q , but it is not supported in all frequency bands , specially with XPIC.for example in 38G modulation higher than 1024Q is not supported.
Also with Intracom(Infracom?) 4096q is supported as I know. But again with Intra com , we don't use it even on non xpic links because of availability/quality issues on high QAM modulations.
Br.
omid

Sent from my HUAWEI G750-U10 using Tapatalk

Hi Simog72

according to my knowledge and my "in-field" experience i can tell that i saw (and i see daily) some working link at 4096QAM and XPIC (and ACM)
It's an Italian Microwave product named ALFOPlus2 (Siae Microelettronica)
It's a compact single box dual carrier with 4xGbe ports (similar to IP20C but with XPIC canceller @ 4096QAM , little higher sysgain and upto 112MHz channels capability)
i saw working links in 18GHz, 23GHz and 11GHz freq ranges

i saw with my eyes throughput close to 1.2 Gbps in 56MHz channels (XPIC ) at 4096QAM (without any compression)
and close to 2.1Gbps with compression upto L3.

in my visibility , at the moment, there is not any point to point microwave supplier capable to XPIC 2channels @ 4096QAM


i m curious to know other forum users experiences

from field experience, 4096QAM doesn't work as it is supposed to with slightest signal fluctuation causing high BER

hi Hmursalin
thanks to bring your experience here

can u please share what was the model of the microwave u tried in field ?

and what was the geographical area?

We had a field trial with iPASO VR4, however it was over a water body which was one of the problems. The link worked fine with 1024QAM.

Tested with 2048 QAM with XPIC and 56 Mhz Channel, in AGS020 from SIAE works fine 1.8 Gbps

Megadragon25
thanks to you too for bringing your expertise here!

Can u explain better how was the set up to reach a 1.8Gbps in a 2x56MHz channel Xpic?

According to my knowledge :
SIAE Microelettronica AG20 (split) cannot operate @ 2048QAM/XPIC (only in Non XPIC)
only the ALFOplus2 (full outdoor) operates @ 4096QAM , 2x112MHz and XPIC at same time

in any case 2x56MHz XPIC@2048QAM brings more or less 2x500Mbps

so I suspect u implemented a 4+0 Split mount or you was on with the Header Compressor


can you better explain?

thanks

Hi,

sorry for my late reply i was working out of city... on field if you are keep looking for information I give a document with our solution (I am an engineer of SIAE).

https://www.dropbox.com/s/xali4nkn38...N%2B0.pdf?dl=0

It's possible to work with XPIC but you require licence for use the XPIC.