Bangor University Scientists Aim for 40Gb/sec Broadband Speeds
November 7, 2012 11:02 AM
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Super fast networking gear promises 2000 times faster downloads
2000 times faster downloads with little extra cost sounds pretty darn good
A team of researchers from Bangor University in the UK believes that they can create broadband speeds about 2000 times faster than we have today without a massive increase in costs. The team has managed to reach speeds of 20 GB of data downloaded every second. With that data throughput, you could download a full-length HD movie in about 10 seconds.
The team is now involved in a three-year project with the goal of making the technology commercially viable. The technology the researchers have developed uses fiber-optic cable. The problem with fiber-optic networks is that as the length of the cable increases, errors become more common in an effect known as dispersion.
While many in the industry have been investigating simply adding more physical fiber-optic strands inside cables to allow for the carrying of more data, increasing the size of fiber-optic cable gets expensive.
"The trouble is, that can all cost a lot of money," said Dr Roger Giddings, one of the team running the Ocean project in north Wales. "So the focus for the Ocean project is really to find out if we can do it in a cost-effective way, and is it a viable way of doing it in a commercial setting?
The method the researchers have devised to be able to send more data without introducing errors down a fiber-optic strand is called Optical Orthogonal Frequency Division Multiplexing, or OOFDM. The key breakthrough in the technology was the development of a piece of electronics that can encode and decode optical signals on the fly.
So far, the team has been able to reach data speeds of 20 Gb per second, but they believe they can reach speeds as high as 40 Gb per second. The team of researchers is also working with major industry partners, including Fujitsu, the Fraunhofer Heinrich Hertz Institute, Finisar Israel, and VPIsystems.
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RE: ofdm isn't new...
11/7/2012 1:47:12 PM
Aren't wavelength and frequency two sides of the same coin? I think you're trying to say that people in this industry usually say "wavelength" rather than frequency.
RE: ofdm isn't new...
11/7/2012 4:10:31 PM
Aren't wavelength and frequency two sides of the same coin?
Frequency is how often the wave repeats in a given time period.
Wavelength is the duration of the wave or pulse. Or in better terms it is measuring two points of the same phase on a sine wave. ie... by the distance between the 50% point (or zero crossing) of the leading and trailing edges.
If a sinusoidal wave is moving at a fixed speed then wavelength is inversely proportional to frequency. or Pulse Repetition Interval (PRI) over Pulse Repetition Frequency(PRF) --PRI/PRF
But once the wave has been modulated away from a pure sine wave then far more calculations come into play.
However, a far less accurate yet often used "wavelength" is referring to the modulation of several sinusoidal waves together.
If you were talking to an Electronic Signals Intelligence analyst(SIGINT or ELINT) you'd need to be far more precise and use the first reference, else you would certainly get lost in the communication. General "layman" use would work well enough with the second.
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