Well written, Gulik! Thanks. 73, DC6NY
-----Ursprüngliche Nachricht----- Von: Gullik Webjorn [mailto:gullik.webj...@corevalue.se] Gesendet: Mittwoch, 6. Dezember 2017 23:32 An: freetel-codec2@lists.sourceforge.net Betreff: Re: [Freetel-codec2] Codec2 repeater I think it is useful to think about WHY you would want to introduce "new technology". It does make sense to take advantage of current development concerning modulation and bitrate, and in this area Ham Radio is far behind. As for TDMA, why would we want that ? Well, I feel separate channels is against the spirit of ham radio, however as a vehicle for single frequency use it would be nice. Also "subrepeating" a timeslot could allow for "distributed" repeaters, covering large or rather controlled areas such as a county, and a means for a local group to JOIN a larger community. We are seeing subtones creating "private" repeaters, various incompatible digital modes effectively fencing out traveling and occasional users, sometimes because you do not know the access "code". I would like to se Hams absorbing new technology, but rather expanding / extending it and making new uses of it, rather than just trying to mimic cellphone networks. More "we have a need, what if...." And of course, OPEN engineering for anyone to replicate..... SM6FBD On 2017-12-06 22:11, Adrian Musceac wrote: > > Perhaps it is possible. However, we have repeaters around here with more than 200 km coverage radius, and I don't see TDMA solving both capacity and coverage. Time will tell. > > Glen, thanks for expanding on LTE. I am not deeply familiar with the LTE PHY and I don't intend to copy it, just botrow some ideas. > > best regards, > Wdrian > >> I think that's more a limitation of existing protocols. For example >> we >> >> could design a TDMA protocol to handle longer distances, or use probe >> packets to measure the propagation delay and compensate (e.g. send >> schedule tx for a later timeslot). >> >> OFDMA sounds interesting, I'll look into it some time. >> >> I agree with Glen - mFSK is just a small change to 2FSK in terms on >> implementation complexity. >> >>> Meanwhile people tend to disregard open source projects as inferior, >>> so getting traction won't happen soon. >> Perhaps in today's Ham community, however in the wider fields of >> engineering and IT open source is generally regarded as superior - >> for good reason. >> >> Cheers, >> >> David >> >> --------------------------------------------------------------------- >> --------- Check out the vibrant tech community on one of the world's >> most engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Freetel-codec2 mailing list >> Freetel-codec2@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ---------------------------------------------------------------------------- -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
