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Tech Review reports an "impossible" development, https://www.technologyreview.com/lists/innovators-under-35/2016/inventor/dinesh-bharadia/
Because the signal from broadcasting a radio transmission can be 100 billion times louder than the receiving one, it was always assumed that outgoing signals would invariably drown out incoming ones. That's why radios typically send and receive on different frequencies or rapidly alternate between transmitting and receiving. "Even textbooks kind of assumed it was impossible," Bharadia says.
Bharadia developed hardware and software that selectively cancel the far louder outgoing transmission so that a radio can decipher the incoming message. The creation of the first full-duplex radio, which eventually could be incorporated into cell phones, should effectively double available wireless bandwidth by simply using it twice.
Any bets on when this will make it to production, maybe as part of 7G(eneration) wireless? Or will the technology go black, used first by military?
And, does a person's name ever influence their career? "Bharadia" sounds awfully close to "bi-radio"...
(Score: 3, Interesting) by VanderDecken on Thursday September 22 2016, @02:32PM
TBH, I can't see this as being all that interesting for mainstream military purposes. The big wins there are frequency hopping, burst tx, and crypto. As someone else said, it sounds like more of a solution looking for a problem, unless there's a second order benefit in SIGINT or some such.
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(Score: 0) by Anonymous Coward on Thursday September 22 2016, @02:42PM
My bet is military has been using it for years, in CW radars.
(Score: 4, Interesting) by Spook brat on Thursday September 22 2016, @04:43PM
I disagree; much of military radio protocol is based on the limitation of talk-or-listen-but-never-both that, until now, was considered inherent to radio operation. I'd be interested to see how that culture shifts after adoption of this new technique.
Of course, it's likely that protocol would remain; there are advantages to a system where only one person talks at once, and I kinda doubt the .mil would want to lose that. At least, though, when SHTF and radio discipline breaks down, the radio operator would know that they're talking over someone else. That alone would be worth adopting full duplex radio in a military setting.
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(Score: 2) by Osamabobama on Thursday September 22 2016, @04:57PM
If this technology pans out, the military will certainly embrace it...ten years after it's commonplace everywhere else. The speed of military acquisition is mind-numbingly slow...
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(Score: 1, Interesting) by Anonymous Coward on Thursday September 22 2016, @06:34PM
The transmitting part can cleanly remove his own signal and read the other one, but a third party would have to do a lot more work to deduce both the signals. I don't know enough about radio to comment on how much work really, but it seems like it would impede casual eavesdropping while probably not seriously impeding a real adversary.
(Score: 2) by Spook brat on Thursday September 22 2016, @07:24PM
it seems like it would impede casual eavesdropping while probably not seriously impeding a real adversary.
Not even that. Anyone listening with an antenna that's not literally on the same circuit as the transmitter doesn't have anywhere near the problem listening to both transmissions as either transmitter does. It's like standing in a cocktail party; unless someone is shouting right in your ear it's not hard to hear multiple conversations at once.
If you want to make a clean recording of only one voice in multiple broadcasts then that can be tricky, but it's not a problem fixed by this article's innovation (and not particularly hard, either).
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