These guys claim a new modulation method that exceeds the data transmission rate set by the Shannon limit. Any opinions? Opinions on this topic that is, I KNOW you all have considerable opinions on other issues ;) http://www.astrapi-corp.com ChesterW
Breaking the Shannon Channel Capacity Limit
Started by ●July 28, 2015
Reply by ●July 28, 20152015-07-28
On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> wrote:>These guys claim a new modulation method that exceeds the data >transmission rate set by the Shannon limit. Any opinions? Opinions on >this topic that is, I KNOW you all have considerable opinions on other >issues ;) > >http://www.astrapi-corp.com > >ChesterWProbably just another "perpetual motion" fraudulent scheme like this one... <http://tmtechinc.com/> ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
Reply by ●July 28, 20152015-07-28
On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> Gave us:>These guys claim a new modulation method that exceeds the data >transmission rate set by the Shannon limit. Any opinions? Opinions on >this topic that is, I KNOW you all have considerable opinions on other >issues ;) > >http://www.astrapi-corp.com > >ChesterWQuite doubtful. Even QAM 256 is hard to beat, and it fills the spectrum nearly as full as is possible.
Reply by ●July 28, 20152015-07-28
On 7/28/2015 5:29 PM, ChesterW wrote:> These guys claim a new modulation method that exceeds the data > transmission rate set by the Shannon limit. Any opinions? Opinions on > this topic that is, I KNOW you all have considerable opinions on other > issues ;) > > http://www.astrapi-corp.com > > ChesterWAs I understand things, one can exceed the theoretical maximum given by the noisy channel coding theorem if you're OK with information being lost in the process. Depending on the particulars of the modulation scheme and/or data being transmitted, this may or may not be a problem. Though it's unlikely that I have the skill in statistical thermodynamics and information theory to do so, it can probably be shown that exceeding the noisy channel capacity with no information loss violates Liouville's thoerem: https://en.wikipedia.org/wiki/Liouville%27s_theorem_(Hamiltonian) which is a big uh-uh - i.e. you're violating the second law of thermodynamics.
Reply by ●July 28, 20152015-07-28
On 7/28/2015 5:41 PM, Jim Thompson wrote:> On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> > wrote: > >> These guys claim a new modulation method that exceeds the data >> transmission rate set by the Shannon limit. Any opinions? Opinions on >> this topic that is, I KNOW you all have considerable opinions on other >> issues ;) >> >> http://www.astrapi-corp.com >> >> ChesterW > > Probably just another "perpetual motion" fraudulent scheme like this > one... > > <http://tmtechinc.com/>I don't see a description of how TM works, so how can you say it doesn't surpass the Shannon limit? I will acknowledge it is unlikely to be real, but until you know what it is, how can you say it is a fraud? -- Rick
Reply by ●July 28, 20152015-07-28
On 7/28/2015 5:41 PM, Jim Thompson wrote:> On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> > wrote: > >> These guys claim a new modulation method that exceeds the data >> transmission rate set by the Shannon limit. Any opinions? Opinions on >> this topic that is, I KNOW you all have considerable opinions on other >> issues ;) >> >> http://www.astrapi-corp.com >> >> ChesterW > > Probably just another "perpetual motion" fraudulent scheme like this > one... > > <http://tmtechinc.com/> > > ...Jim Thompson >Oh, dear, the orbital angular momentum folks have come to microwave. A few years back the original OAM people were claiming that there was this vast number of completely untapped propagation modes in fibres that would allow some ridiculous gross bandwidth increase. Then some saner folks published this beautiful letter-to-the-journal-editor that I can't lay my hands on...it showed that if the OAM people were correct, the blackbody radiation from a hot object would go up by a similar ridiculously large factor, which is not observed. The OAM states aren't new-and-different, they're just another basis set for the EM field. Nothing to see here folks, show's over, move along. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Reply by ●July 28, 20152015-07-28
On Tue, 28 Jul 2015 18:03:42 -0400, Phil Hobbs <hobbs@electrooptical.net> Gave us:>On 7/28/2015 5:41 PM, Jim Thompson wrote: >> On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> >> wrote: >> >>> These guys claim a new modulation method that exceeds the data >>> transmission rate set by the Shannon limit. Any opinions? Opinions on >>> this topic that is, I KNOW you all have considerable opinions on other >>> issues ;) >>> >>> http://www.astrapi-corp.com >>> >>> ChesterW >> >> Probably just another "perpetual motion" fraudulent scheme like this >> one... >> >> <http://tmtechinc.com/> >> >> ...Jim Thompson >> > >Oh, dear, the orbital angular momentum folks have come to microwave. A >few years back the original OAM people were claiming that there was this >vast number of completely untapped propagation modes in fibres that >would allow some ridiculous gross bandwidth increase. > >Then some saner folks published this beautiful >letter-to-the-journal-editor that I can't lay my hands on...it showed >that if the OAM people were correct, the blackbody radiation from a hot >object would go up by a similar ridiculously large factor, which is not >observed. The OAM states aren't new-and-different, they're just another >basis set for the EM field. Nothing to see here folks, show's over, >move along. > >Cheers > >Phil HobbsEven sqpsk is closing in on the limits. But just when folks thought that optical chip mask burning was near its limit somewhere up around 30nm, somebody stepped in with a new idea and they all do it through a layer of water now and are down near a few nm..
Reply by ●July 28, 20152015-07-28
On Tue, 28 Jul 2015 18:00:24 -0400, rickman <gnuarm@gmail.com> wrote:>On 7/28/2015 5:41 PM, Jim Thompson wrote: >> On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> >> wrote: >> >>> These guys claim a new modulation method that exceeds the data >>> transmission rate set by the Shannon limit. Any opinions? Opinions on >>> this topic that is, I KNOW you all have considerable opinions on other >>> issues ;) >>> >>> http://www.astrapi-corp.com >>> >>> ChesterW >> >> Probably just another "perpetual motion" fraudulent scheme like this >> one... >> >> <http://tmtechinc.com/> > >I don't see a description of how TM works, so how can you say it doesn't >surpass the Shannon limit? I will acknowledge it is unlikely to be >real, but until you know what it is, how can you say it is a fraud?I was involved, as a contractor... until I asked too many questions>:-}...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
Reply by ●July 28, 20152015-07-28
On 7/28/2015 6:00 PM, rickman wrote:> On 7/28/2015 5:41 PM, Jim Thompson wrote: >> On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> >> wrote: >> >>> These guys claim a new modulation method that exceeds the data >>> transmission rate set by the Shannon limit. Any opinions? Opinions on >>> this topic that is, I KNOW you all have considerable opinions on other >>> issues ;) >>> >>> http://www.astrapi-corp.com >>> >>> ChesterW >> >> Probably just another "perpetual motion" fraudulent scheme like this >> one... >> >> <http://tmtechinc.com/> > > I don't see a description of how TM works, so how can you say it doesn't > surpass the Shannon limit? I will acknowledge it is unlikely to be > real, but until you know what it is, how can you say it is a fraud? >You might look up the derivation of the Shannon limit, for a start. Not too many assumptions involved. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Reply by ●July 28, 20152015-07-28
On Tue, 28 Jul 2015 16:29:10 -0500, ChesterW <iamsnoozin@yahoo.com> wrote:>These guys claim a new modulation method that exceeds the data >transmission rate set by the Shannon limit. Any opinions? Opinions on >this topic that is, I KNOW you all have considerable opinions on other >issues ;) > >http://www.astrapi-corp.com > >ChesterWFrom their white paper: Definition: A �periodic channel� is a communication channel that supports only periodic waveforms. What can that mean? -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
