[Mr. K]

cool

but, what happens when something is broadcast continuously?

[tophat9000]

Well if there are two on the same channel at the same time... if you know what you put out and then subtract it you should be able to deduce what the other sent from whats left ..but would need some heavy duty processing power

[epithermal]

Oh great, twice as much information flow! I can’t keep up with it now. ;>) Read their paper here:

http://sing.stanford.edu/pubs/sing-10-00.pdf

[3niner]

Radio traffic can flow in only one direction at a time on a specific frequency, hence the frequent use of "over" by pilots and air traffic controllers, walkie-talkie users and emergency personnel as they take turns speaking.

Not true, it's merely a matter of separating signal and noise. It should be possible for a sender/receiver to use "noise cancelling" logic to cancel what it is sending from what it is receiving at the same time. I didn't read the rest of the article. Is this what they did?

[backwoods-engineer]

But now, Stanford researchers have developed the first wireless radios that can send and receive signals at the same time.

Absolute and utter bullcrap.

As an RF engineer and amateur radio operator, I can tell you that this has been done for DECADES. Just one example: the 10 GHz repeater built by the San Bernadino Microwave Society. They used spatial diversity to transmit and receive on the same frequency at the same time.

Dang, I hate how journalists (and idiot professors) explain things like this.