Whenever I see something that claims to overcome a long tested theory like Shannon's law, it always makes me very suspicious. The explanations I have seen so far are long on claims and short on proof and remind me very much of "perpetual motion machines". So far nothing I have seen shows how they are "side stepping" Shannon. I smell a rat.
They are sidestepping Shannon by taking advantage of spacial multiplexing.
If I'm user fiber-optic communications with 1064nm laser, there's a maximum bandwidth I can get out of a single fiber. But I can always just add more fibers.
You can do this with radio waves too. Just broadcast in such a way that a signal has maximum strength at the desired user's location, and less strength elsewhere.
You need multiple antennas, of course (like multiple fiber heads). I think if you wanted 100% bandwidth for each user, you'd need at least one antenna per user.
Comments
Whenever I see something that claims to overcome a long tested theory like Shannon's law, it always makes me very suspicious. The explanations I have seen so far are long on claims and short on proof and remind me very much of "perpetual motion machines". So far nothing I have seen shows how they are "side stepping" Shannon. I smell a rat.
This doesn't violate the Shannon capacity theorem: Different channels, like MIMO channels, have different capacities.
pCell is basically a proprietary version of network MIMO. (Though maybe still valuable if it can get to market faster).
They are sidestepping Shannon by taking advantage of spacial multiplexing.
If I'm user fiber-optic communications with 1064nm laser, there's a maximum bandwidth I can get out of a single fiber. But I can always just add more fibers.
You can do this with radio waves too. Just broadcast in such a way that a signal has maximum strength at the desired user's location, and less strength elsewhere.
You need multiple antennas, of course (like multiple fiber heads). I think if you wanted 100% bandwidth for each user, you'd need at least one antenna per user.