Wireless breakthrough: one frequency, multiple signals (advance, antenna, sound)
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This is one technology I hope becomes a commercial success:
Quote:
The breakthough achieved by Tamburini and his crew is based on adding orbital angular momentum to the signal-carrying mix, essentially twisting the directed signal in a way that offsets multiple signals in the same frequency.
Multiple signals on one frequency is currently accomplished by timesharing, and it's not new. It sounds like this new method might be more efficient than timesharing a single frequency, though.
"The sent beam was then encoded with two separate signals timed to occupy opposite angles of the spin, and antennas were set up to receive each of them. Theoretically, much more discrete signal-slicing could fit more signals into the same transmitted frequency."
Time slicing. Slice your pie into small chunks. So what? In contrast, polarizing adds signal data space. When you see "vortex" and "singularity" in a bit describing radio, pull on your barn boots, 'cause you are going to be wading in it.
Multiple signals on one frequency is currently accomplished by timesharing, and it's not new. It sounds like this new method might be more efficient than timesharing a single frequency, though.
If it is what I believe it is, polarization has been around for decades. Left, right, vertical, horizontal and circular. This is not timesharing.
I don't think (but then again what do I know) that the Shannon–Hartley theorem is going to be violated anytime soon, though I would like to see it proven wrong.
Read the article. Sounds like they might be doing timesharing, with maybe a little polarization tossed in like salad dressing. I agree with you overall though.
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