I am not sure how there could be, it is pretty much the polar opposite of a modulation and FEC that approaches the shannon limit.
There are all sorts of satellite comm things (commercial and military) that will fall back to a BPSK 1/2 code rate during bad rain fade events in Ku, Ka and Q bands. On Tue, May 24, 2016 at 2:25 PM, Chuck McCown <ch...@wbmfg.com> wrote: > Is there a modulation more robust than OOK? > Perhaps phase correlated for noise rejection. > > > *From:* Eric Kuhnke <eric.kuh...@gmail.com> > *Sent:* Tuesday, May 24, 2016 3:23 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] 37Km, 6Gbps > > There are some upcoming 60 GHz band 10 Gbps radios which are OOK (or BPSK) > simply for the increased link budget, and because it makes them simpler to > manufacture... The free GHz are there to use and it falls off so quickly in > the air. They're trying to get to high reliability in 4 to 5 nines at > 750-800 meters. > > On Tue, May 24, 2016 at 1:43 PM, Chuck McCown <ch...@wbmfg.com> wrote: > >> Even simpler. Crystal radio could demod those. >> >> *From:* Eric Kuhnke <eric.kuh...@gmail.com> >> *Sent:* Tuesday, May 24, 2016 2:40 PM >> *To:* af@afmug.com >> *Subject:* Re: [AFMUG] 37Km, 6Gbps >> >> >> All of the first gen commercial 80 GHz products from 2006-2007 (gigabeam, >> Bridgewave) are basically OOK and use 5GHz each direction FDD, 1Gbps. >> On May 24, 2016 6:26 AM, "Chuck McCown" <ch...@wbmfg.com> wrote: >> >>> Well when you have 5 GHz of BW, getting 6 Gbps out of it is not much of >>> a stretch. FSK would work for that. >>> >>> *From:* Eric Kuhnke <eric.kuh...@gmail.com> >>> *Sent:* Tuesday, May 24, 2016 12:01 AM >>> *To:* af@afmug.com >>> *Subject:* Re: [AFMUG] 37Km, 6Gbps >>> >>> 1 watt? They're feeding +30dBm Tx power into a 52dbi (60cm size) gain >>> antenna? >>> >>> I bet it's only 37 km in clear sunny skies but that's still quite >>> powerful. >>> >>> On Mon, May 23, 2016 at 7:42 PM, Josh Reynolds <j...@kyneticwifi.com> >>> wrote: >>> >>>> "Transmitting the contents of a conventional DVD in under ten seconds >>>> by radio transmission is incredibly fast -- and a new world record in >>>> wireless data transmission. With a data rate of 6 Gigabit per second >>>> over a distance of 37 kilometers, a collaborative project with the >>>> participation of researchers from the University of Stuttgart and >>>> the Fraunhofer Institute for Applied Solid State Physics IAF exceeded >>>> the state of the art by a factor of 10." >>>> >>>> https://www.sciencedaily.com/releases/2016/05/160523083819.htm >>>> >>> >>> >> >
