I have seen signal tests with a local operator deploying Tarana getting
some remarkable throughput even in NLOS situations. The main feature is
using multipath in time and polarization to enable signal reconstruction.
bp
<part15sbs{at}gmail{dot}com>
On 10/8/2025 4:04 PM, castarritt wrote:
The 450M did beam steering with phase delay that allowed it to shape
the pattern, but only in a sort of sawtooth like preset pattern that
it could scan left and right. Tarana can dynamically beamform to
shape the pattern towards and away from specific azimuths as needed,
and perhaps most importantly, the Tarana client radios can do the same.
On Wed, Oct 8, 2025 at 5:34 PM Ken Hohhof <[email protected]> wrote:
Over the years I’ve become suspicious of the term beamforming.
In the hands of marketing people, having multiple antennas and
choosing the one with the strongest signal, becomes
“beamforming”. Even a Cambium 450m I don’t think does beamforming
(in the sense of feeding multiple array elements with different
phase delays to shape the antenna beam), it just has 14 narrow
sectors inside. But that allows it to talk to multiple SMs at the
same time. I think cellular antennas may use actual beamforming,
I don’t know. Tarana talks like they use active beamforming, but
it could just be the usual marketing hype, again I don’t know.
*From:*AF <[email protected]> *On Behalf Of *Adam Moffett
*Sent:* Wednesday, October 8, 2025 5:11 PM
*To:* 'AnimalFarm Microwave Users Group' <[email protected]>
*Subject:* Re: [AFMUG] 16 spatial streams how is that possible
I suppose there's electronic beam forming, but could that really
work with an array of 16 little dipoles in a circle?
Since all the clients are 2x2, and the DSP magic to differentiate
all those other chains has to come with a monetary and electrical
cost that most consumers aren't going to pay, I'm guessing that
a16x16 router would just be a bicycle with 14 extra wheels.
------------------------------------------------------------------------
*From:* Adam Moffett <[email protected]>
*Sent:* Wednesday, October 8, 2025 5:51 PM
*To:* 'AnimalFarm Microwave Users Group' <[email protected]>
*Subject:* Re: [AFMUG] 16 spatial streams how is that possible
What could you theoretically subtract from the raw received signal
to leave you with one desired transmission distinct from the
others? It's the 21^st century, so we don't need to worry about
how computationally intensive it would be; we only need to worry
about whether you could do it.
For instance, if I have 16 different QAM constellations on top of
each other, but I knew they each had a certain phase offset, then
could I separate them? What about a time offset?
And oh boy, what if there's one 802.11n client on the WLAN? He's
2x2 and doesn't have the magic to handle 8 or 16 chains. Whenever
the AP sends a frame to that guy does it have to temporarily stop
transmitting on all the other chains? I bet it does.
-Adam
------------------------------------------------------------------------
*From:* AF <[email protected]> on behalf of Ken Hohhof
<[email protected]>
*Sent:* Wednesday, October 8, 2025 3:07 PM
*To:* 'AnimalFarm Microwave Users Group' <[email protected]>
*Subject:* [AFMUG] 16 spatial streams how is that possible
In the list of supposed advantages of WiFi7 over WiFi6, I see 16
spatial streams vs 8.
Can someone explain to me the mechanism for using 16 spatial
streams in a typical WiFi environment? I have a hard time
wrapping my head around anything more than 2 using V/H or dual
slant polarization.
I was willing to believe that maybe you could get more (like maybe
4 spatial streams) due to reflections off furniture and stuff, and
that somehow signal processing could magically separate out the
streams (even though I don’t understand how it does that). But 8
or 16 just sounds like crazy talk.
Maybe it’s like the rich people houses with 16 car garages, if I
were rich people I would understand?
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