|
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 which is considered as converted to an analogue signal, while it is considered as a digital signal in the second case. From Wikipedia under the
GNU Free Documentation License From Yahoo Image Search: "Digital signals"  drdobbs.com Wed, 04 Aug 2010 14:41:33 GMT+00:00 Dr. Dobb's One of the most common digital - signal -processing techniques is the discrete Fourier transform (DFT), which breaks a signal into its component frequencies ...  networkworld.com Wed, 04 Aug 2010 14:51:18 GMT+00:00 NetworkWorld.com When the TV industry transitioned from analog to digital signals it freed up radio frequency spectrum, some of which the FCC auctioned off to wireless ... NSF meeting looks at squeezing more out of wireless spectrum NetworkWorld.com  fireengineering.com Tue, 27 Jul 2010 07:21:57 GMT+00:00 FireEngineering.com The radio signals can't trigger the pagers needed to call volunteers to a fire. Also the digital signals don't always penetrate basements or concrete ... From Google News Search: "Digital signals"
|
Radioworld UK
Com-One
MyRadioStore