digital sign processing (DSP)
Posted by: Margaret RouseWhatIs.com
Contributor(s): David Brancato, Mark Denni, and Vincent MartinezDigital sign processing (DSP) refers to different techniques for improving the precision and reliability of electronic communications. The theory behind DSP is quite sophisticated. Essentially, DSP functions by clarifying, or standardizing, the levels or states of a electronic signal. ADSP circuit is able to differentiate between human-made signals,which are orderly, and noise, which is inherently chaotic.
All communications circuits contain some noise.This is true no matter if the signals are analog or digital,and regardless of your style of details conveyed. Noise will be the eternal bane of communications engineers, who are always striving to find new ways to boost the signal-to-noise ratioin communications methods. Traditional techniques of optimizing S/N ratio include increasing the transmitted signal power and increasing the receiver sensitivity. (In wireless methods,specialized antenna techniques can also help.) Electronic signal processing dramatically improves the sensitivity of a receiving unit. The effect is most apparent when noise competes that has a desired signal. A good DSP circuit can sometimes seem like an electronic miracle worker. But there are limits to what it can do. If the noise is so strong that all traces of the signal are obliterated, a DSP circuit cannot find any get while in the chaos,and no signal will probably be received.
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If an incoming sign is analog, such as a standard television broadcast station, the sign is first converted to digital form by an analog-to-digital converter(ADC). The resulting digital signal has two or a lot more levels. Ideally, these levels are always predictable, exact voltages or currents. Nevertheless, because the incoming signal is made up of noise, the levels are not always at the standard values. The DSP circuit adjusts the levels so they are at the correct values. This practically eliminates the noise. The digital signal is then converted back to analog from via a digital-to-analog converter (DAC).
If a received signal is digital, by way of example computer information, then the ADC and DAC are not necessary. The DSP acts directly around the incoming sign, eliminating irregularities caused by noise, and thereby minimizing the amount of errors per unit time.
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