News tagged with digital signals
Explained: The Discrete Fourier Transform
(PhysOrg.com) -- In 1811, Joseph Fourier, the 43-year-old prefect of the French district of Isčre, entered a competition in heat research sponsored by the French Academy of Sciences. The paper he submitted ...
Nov 25, 2009 |
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New 167-processor chip is super-fast, ultra energy-efficient
A new, extremely energy-efficient processor chip that provides breakthrough speeds for a variety of computing tasks has been designed by a group at the University of California, Davis. The chip, dubbed AsAP, is ultra-small, ...
Apr 22, 2009 |
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Hubble to receive high-tech James Webb Space Telescope technology
Scientists and engineers now creating new technologies for NASA's James Webb Space Telescope, have realized they can be used to enhance the Hubble's Advanced Camera for Surveys (ACS) in the upcoming servicing ...
Space & Earth / Space Exploration
May 08, 2009 |
4.8 / 5 (11) |
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High-speed CMOS sensors provide better images
Conventional CMOS image sensors are not suitable for low-light applications such as fluorescence, since large pixels arranged in a matrix do not support high readout speeds. A new optoelectronic component ...
Jan 03, 2012 |
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FCC to open up vacant TV airwaves for broadband
(AP) -- A new flavor of Wi-Fi, with longer range and wall-piercing power, could show up in wireless gadgets a year from now if the Federal Communications Commission works out the last details of new spectrum ...
Sep 13, 2010 |
4.7 / 5 (6) |
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Friday is final curtain for analog TV signals
(AP) -- The last major TV stations that are still broadcasting in analog will turn those signals off Friday and go all digital. And this time, they really mean it.
Jun 10, 2009 |
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Record-speed wireless data bridge demonstrated: Takes high-speed communications the 'last mile'
A team of researchers in Germany has created a new way to overcome many of the issues associated with bringing high-speed digital communications across challenging terrain and into remote areas, commonly referred to as the ...
Feb 27, 2012 |
5 / 5 (3) |
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3-D, after-the-fact focus image sensors invented
(PhysOrg.com) -- At the heart of digital photography is a chip called an image sensor that captures a map of the intensity of the light as it comes through the lens and converts it to an electronic signal.
Apr 03, 2012 |
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Next generation digital maps are laser sharp
Restoring habitat for spawning species of fish, such as Atlantic salmon, starts with a geological inventory of suitable rivers and streams, and the watershed systems that support them. But the high-tech mapping ...
Space & Earth / Earth Sciences
Feb 12, 2009 |
4.3 / 5 (3) |
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Mobile digital TV poised for big moves in 2011
Rabbit ears on a mobile phone? Well, not exactly, but broadcasters and gadget manufacturers are working to beam live television to portable devices.
Dec 22, 2010 |
5 / 5 (2) |
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Fujitsu develops innovative anti-distortion technology to cut energy use by two-thirds
Fujitsu today announced the development of a digital signal processing algorithm to compensate for waveform distortion in long-haul transmission systems of over several hundreds of kilometers. This, in turn, ...
Mar 09, 2012 |
5 / 5 (2) |
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700,000 callers phone digital TV hot line
(AP) -- Nearly 700,000 calls were received by a federal hot line this week from people confused about the nationwide switch from analog to digital TV broadcasts that occurred Friday.
Jun 13, 2009 |
2.7 / 5 (3) |
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European research's bit part in Ben Hur Live?
(PhysOrg.com) -- Technology developed by European researchers is helping the stage production of Ben Hur Live in London's O2 arena.
Sep 17, 2009 |
5 / 5 (1) |
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Free local TV soon to be available on cell phones
(AP) -- The prospect of watching live, local TV shows on mobile phones and other portable devices is getting closer. Manufacturers this week are showing off gadgets can receive a new type of digital TV transmissions.
Jan 06, 2010 |
5 / 5 (1) |
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Fujitsu develops high-performance distortion-compensation circuit
Fujitsu announced their development of a digital signal processing algorithm to compensate for waveform distortions in signals transmitted by fiber-optic cables in long-haul transmission systems of 100 km ...
Sep 29, 2011 |
5 / 5 (1) |
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Digital signal
The term digital signal is used to refer to more than one concept. It can refer to discrete-time signals that have a discrete number of levels, for example a sampled and quantified analog signal, or to the continuous-time waveform signals in a digital system, representing a bit-stream. In the first case, a signal that is generated by means of a digital modulation method is considered as converted to an analog signal, while it is considered as a digital signal in the second case.
For more information about Digital signal, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
