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you're not adding more spectrum - my point - its a finite resource. you can also emit lower power and add more cells since they wont interfere. but theres only
by zobzu 12y ago
you're not adding more spectrum - my point - its a finite resource.
you can also emit lower power and add more cells since they wont interfere.
but theres only so many details you can put in a comment post without making it 20 pages.
- im3w1l 12y agoBut it is very important! Because you could have two devices communicating using many channels on the same spectrum. This removes the theoretic Nyquist rate bound.
- zobzu 12y agocall me when the 2 waves are sent on the same frequency at the same moment (ie same period). it doesnt work. mimo doesnt double the spectrum. it sends on the same spectrum. so "but blah!"
- joosters 12y agoI'm not sure we'll be able to call you, it sounds like your phone works on different principles to ours!
- zobzu 12y agoor you just called 2 friends to downvote by 2 as its an old topic lol. sad that most discussion forums end up with such conversations. you cannot send then at the same exact time because theyre the same particules of matter. you can send them at slightly different times, angles, etc. still doesnt make the straw bigger.
- cma 12y agoBut the details matter; you don't even need more finely grained directional antennas to get more bandwidth: send two different signals from two different antennas and receive them with two antennas; with the data you get and certain encoding schemes, you can work out the two underlying superpositioned waves on a DSP chip and nearly double your bandwidth while using the same spectrum, thus working around Nyquist and adding another "straw": http://en.wikipedia.org/wiki/MIMO#Sampling_theory_in_MIMO_systems http://en.wikipedia.org/wiki/MIMO#Sampling_theory_in_MIMO_sy...