The breakthrough came when researchers found that radios could be tweaked to filter out the signal from its own transmitter, something that already happens within noise-canceling headphones.
ENGADGET: 'Stanford gurus enable two-way radio communications. Over.'
The switchover is happening so that Freeview services can be extended to people who cannot currently get them, including those who receive their signal from a relay transmitter.
This type of tag, however, requires a buoy to carry the aerial, and this is attached to the shark by a ten-metre-long line. (The line is needed because the sharks themselves rarely break the surface, and the transmitter cannot signal to the satellite from under water.) Two American biologists, Scott Eckert and Brent Stewart, from the Hubbs-Sea World Research Institute in San Diego, have had some success with satellite tracking.
The basics behind Loran and GPS are largely the same, with devices measuring the time it takes for a signal to travel between a transmitter and your receiver.
Over 10, 000 tweets were collated, as well as videos from comedians, which will be beamed into space using a transmitter with a signal 20 times stronger than that of typical commercial radio transmitters.
ENGADGET: Alt-week 8.18.12: Graphene sponges, zero-g athletics and tweets in space
The switchover began early on Wednesday morning when BBC Two's analogue signal was permanently turned off at the Oxford transmitter group.
And, to add another level of complexity, individual phones will adjust their transmitter power based upon the received signal strength from the MicroCell.
FORBES: Some AT&T MicroCell Users Are Experiencing Problems With iPhone 5 and iOS 6
The station is also planning to install a transmitter and antenna system in Times Square to enhance its signal.
And once that desired state is achieved, the included IR transmitter (which plugs into your smartphone or tablet), will send a signal to the Orbit, effectively giving it flight.
ENGADGET: Puzzlebox Orbit mind-on: brainwaves and hack-friendly helicopters (video)
Alcatel, however, will use a small radio transmitter concealed in the battery cover of the phone to transmit a coded low-power signal to the belt clip to tell it when to vibrate, a company spokesperson said after the press conference.
CNN: Technology - Alcatel personalizes vibrating phone alerts
Over at Philips' demo of their wireless HDMI transmitter, a bunch of techies were fiddling around trying to get the blank display to accept a signal.
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