Verizon - CDMA - Cellphones... I did come from Motorola after all (and they used to be the really big wireless company)....
On Sat, Oct 25, 2014 at 4:25 PM, Jaime Solorza via Af <[email protected]> wrote: > Dr. Fehrer's book from U of San Diego or Robert Winch's one. Both covered > this. Isnt this what AT&T is pushing in commercial about Picocells? > > Jaime Solorza > On Oct 25, 2014 2:43 PM, "Chuck Macenski via Af" <[email protected]> wrote: > >> Actually...CDMA techniques (PN modulation) re-channel a band based on >> time rather than frequency. In a multi point environment, this allows >> multiple people to share a frequency bandwidth in a not terribly >> inefficient way when all of the simultaneous communication paths are >> considered. >> >> On Sat, Oct 25, 2014 at 12:44 PM, Chuck McCown via Af <[email protected]> >> wrote: >> >>> Yeah, isochronous pseudorandom noise mod/demod techniques will pull >>> info from sewer. I think the deep space network uses some of those >>> techniques. But PN modulation does not help throughput. It wastes >>> bandwidth. >>> >>> Speed/interference immunity/narrow channels – pick one. >>> >>> *From:* Bill Prince via Af <[email protected]> >>> *Sent:* Saturday, October 25, 2014 11:27 AM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] Holy Grail >>> >>> The holy grail would be the ability to modulate a signal and receive >>> it correctly in the face of withering interference. >>> >>> The GPS system accomplishes that through the technique of encoding the >>> data within "pseudo noise". The only problem being that GPS data is >>> relatively static compared to what we deal with. >>> >>> >>> bp >>> >>> On 10/25/2014 10:15 AM, Chuck McCown via Af wrote: >>> >>> I think folks without deep experience in either 1) operating a WISP or >>> 2)without deep experience in electrodynamics and modulation (99.999% of the >>> general population) somehow think that Moore’s Law applies to wireless. >>> >>> The only way to scale this this stuff in a way approximating Moore’s Law >>> is to just keep adding cell/ap sites. >>> >>> I read a book back in 1990 that outlined this problem for the nascent >>> cell phone industry. The book is still spot on. >>> >>> *From:* Rory Conaway via Af <[email protected]> >>> *Sent:* Friday, October 24, 2014 11:41 PM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] Holy Grail >>> >>> >>> Or looky, looky, AC PTMP MU-MIMO. Imagine what that would do for White >>> Space. >>> >>> >>> >>> Rory >>> >>> >>> >>> *From:* Af [mailto:[email protected] <[email protected]>] *On >>> Behalf Of *That One Guy via Af >>> *Sent:* Friday, October 24, 2014 10:22 PM >>> *To:* [email protected] >>> *Subject:* Re: [AFMUG] Holy Grail >>> >>> >>> >>> Sterling, thank you! I think you and me must be the only ones who can >>> see the elephant...... OH LOOKY LOOKY AC PTMP!! >>> >>> >>> >>> On Fri, Oct 24, 2014 at 9:09 PM, Sterling Jacobson via Af <[email protected]> >>> wrote: >>> >>> Is it just me, or is no one realizing that we are still not that far >>> from 2005 with wireless. >>> >>> >>> >>> Yes, we have 300-1Gbps capable radios. >>> >>> But they trade that for larger channel allocations and even more signal >>> to noise requirements. >>> >>> >>> >>> But the spectrum allocations haven’t changed enough to use these new >>> features to their fullest in a radio dense environment. >>> >>> >>> >>> When doing cost analysis in my area last year for wireless I realized I >>> had to forklift upgrade most of my network, and build towers out in a half >>> mile range. >>> >>> >>> >>> This was to get the 30Mbps plan rates to really work. >>> >>> >>> >>> The costs were skyrocketing because of all the towers and sectors. >>> >>> >>> >>> I think the real winners of late are still the rural and low density >>> wireless provider domains. >>> >>> They are the ones with clean enough spectrum to cost this competitively. >>> >>> >>> >>> >>> >>> >>> >>> *From:* Af [mailto:[email protected]] *On Behalf Of *Jaime Solorza >>> via Af >>> *Sent:* Friday, October 24, 2014 6:41 PM >>> *To:* Animal Farm >>> *Subject:* Re: [AFMUG] Holy Grail >>> >>> >>> >>> Bring out the Holy Grenade of Antioch... >>> >>> Jaime Solorza >>> >>> On Oct 24, 2014 5:56 PM, "Jayson Baker via Af" <[email protected]> wrote: >>> >>> Anyone else get this email? >>> >>> >>> >>> Anyone know what it is? >>> >>> >>> >>> >>> >>> -- >>> >>> All parts should go together without forcing. You must remember that the >>> parts you are reassembling were disassembled by you. Therefore, if you >>> can't get them together again, there must be a reason. By all means, do not >>> use a hammer. -- IBM maintenance manual, 1925 >>> >>> >>> >>
