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 <af-boun...@af.afmug.com> On Behalf Of Chuck McCown Sent: Sunday, September 13, 2020 6:54 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> 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 <mattli...@rivervalleyinternet.net <mailto:mattli...@rivervalleyinternet.net> > 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 <losguyswirel...@gmail.com <mailto:losguyswirel...@gmail.com> > wrote: V On Sun, Sep 13, 2020, 3:48 PM Matt Hoppes <mattli...@rivervalleyinternet.net <mailto:mattli...@rivervalleyinternet.net> > wrote: Slant 45 > On Sep 13, 2020, at 4:51 PM, Chuck McCown <ch...@wbmfg.com > <mailto:ch...@wbmfg.com> > wrote: > > Are cell signals V pol? > > Sent from my iPhone > > -- > AF mailing list > AF@af.afmug.com <mailto:AF@af.afmug.com> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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