Capacity for QAM
in [DSP]
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From: Jerry Avins on 19 Mar 2010 23:18 dvsarwate wrote: > ... it is not possible to exceed the speed limit and > simultaneously achieve good gas mileage. ... Actually, Dilip, I noticed a different effect with two of my cars. They seemed to use a pretty constant amount of fuel for a given length of time. The faster I went, the further a gallon took me. Go figure! Jerry -- Discovery consists of seeing what everybody has seen, and thinking what nobody has thought. .. Albert Szent-Gyorgi �����������������������������������������������������������������������
From: dvsarwate on 20 Mar 2010 07:49 On Mar 19, 10:18 pm, Jerry Avins <j...(a)ieee.org> wrote: > dvsarwate wrote: > > ... it is not possible to exceed the speed limit and > > simultaneously achieve good gas mileage. ... > > Actually, Dilip, I noticed a different effect with two of my cars. They > seemed to use a pretty constant amount of fuel for a given length of > time. The faster I went, the further a gallon took me. Go figure! > > Jerry > -- > Discovery consists of seeing what everybody has seen, and thinking what > nobody has thought. .. Albert Szent-Gyorgi > ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ 75% of car accidents occur within 5 miles of home. So, one should be more careful while driving in the neighborhood? No, one should drive as fast as possible upon leaving home so as to get out of the danger zone as quickly as possible and enter the "safe" zone 5 miles away. --Dilip Sarwate
From: steveu on 20 Mar 2010 08:00 >On Mar 19, 10:18=A0pm, Jerry Avins <j...(a)ieee.org> wrote: >> dvsarwate wrote: >> > ... it is not possible to exceed the speed limit and >> > simultaneously achieve good gas mileage. =A0... >> >> Actually, Dilip, I noticed a different effect with two of my cars. They >> seemed to use a pretty constant amount of fuel for a given length of >> time. The faster I went, the further a gallon took me. Go figure! >> >> Jerry >> -- >> Discovery consists of seeing what everybody has seen, and thinking what >> nobody has thought. =A0 =A0.. Albert Szent-Gyorgi > >75% of car accidents occur within 5 miles of home. >So, one should be more careful while driving in the >neighborhood? No, one should drive as fast as possible >upon leaving home so as to get out of the danger zone >as quickly as possible and enter the "safe" zone 5 miles >away. Why not move 5 miles away, to a safer place? Steve
From: Rune Allnor on 20 Mar 2010 08:38 On 20 Mar, 02:24, dvsarwate <dvsarw...(a)gmail.com> wrote: > Of course, the > BER will be so close to 50% that nobody will want to use such a > system, > but hey, it *is* transmitting 10 bits per symbol rather than 4, and > *is* > operating above capacity as was wanted. Who cares about the BER? This argument plays straight into the hands of the enviro-mentalists: If the BER is roughly 50% in the first place, why transmit at all? One can just install random bit generator at the reciever, and do away with the transmitter. Doing away with the RF stages in both ends will save tremendeous amounts of power, extending battery life with who know how many times. And of course, this scheme will be robust with respect to just about any external influence, be it intereference, multipath or anything else. Rune
From: Michael Plante on 20 Mar 2010 11:40
dvsarwate wrote: >On Mar 19, 10:18=A0pm, Jerry Avins <j...(a)ieee.org> wrote: >> dvsarwate wrote: >> > ... it is not possible to exceed the speed limit and >> > simultaneously achieve good gas mileage. =A0... >> >> Actually, Dilip, I noticed a different effect with two of my cars. They >> seemed to use a pretty constant amount of fuel for a given length of >> time. The faster I went, the further a gallon took me. Go figure! >> > > >75% of car accidents occur within 5 miles of home. >So, one should be more careful while driving in the >neighborhood? No, one should drive as fast as possible >upon leaving home so as to get out of the danger zone >as quickly as possible and enter the "safe" zone 5 miles >away. How is that related to gas mileage, your original argument? Anyway, there are any number of factors why that might happen, including the pdf of your car's position/time having its strongest amplitude near home. Plus, for whatever reason, people like to roll through stop signs in neighborhoods, but are more careful with other stop signs. To throw a wrench in things, there is also an accident factor if you're driving at a significantly different speed than the rest of traffic. When the envirowackos pressured Houston to drop its freeway speed limits to 55mph about a decade ago, just about everybody ignored the change (and even the police chief was unhappy with it), and it was fairly dangerous for the twerps who actually did drop their speed (particularly since so many idiots here feel entitled to drive slowly in the left lane, but that's another story). Fortunately, it got changed back. |