I still can’t wrap my head around how they get ∞x∞ MIMO and 1.21 gigawattsbits from 5 MHz of spectrum. I understand MU-MIMO and beamsteering and all that, but when they start tossing around stuff like 8x8 MIMO I don’t see how you get that many orthogonal signals on the same frequency.
But for maximum spectral efficiency, I assume they use more than 1 polarization, whether V&H or +45 & -45. From: AF <[email protected]> On Behalf Of Chuck McCown Sent: Sunday, September 13, 2020 6:54 PM To: AnimalFarm Microwave Users Group <[email protected]> Subject: Re: [AFMUG] Cell signals. I have a passive antenna experiment in the works. Rather than guess at the right slant, I think I will try V pol initially. Sent from my iPhone On Sep 13, 2020, at 4:12 PM, Matt Hoppes <[email protected] <mailto:[email protected]> > wrote: When GSM began they started using vertical polarization. But as the need for capacity arose antennas changed to slant 45 X polarization. On Sep 13, 2020, at 5:51 PM, Jaime Solorza <[email protected] <mailto:[email protected]> > wrote: V On Sun, Sep 13, 2020, 3:48 PM Matt Hoppes <[email protected] <mailto:[email protected]> > wrote: Slant 45 > On Sep 13, 2020, at 4:51 PM, Chuck McCown <[email protected] > <mailto:[email protected]> > wrote: > > Are cell signals V pol? > > Sent from my iPhone > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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