What do you mean by noise, Electrical Engineering

Assignment Help:

Q. What do you mean by Noise?

In any communication system there are usually two dominant factors that limit the performance of the system:

1. Additive noise, generated by electronic devices that are used to filter and amplify the communication signal.

2. Signal attenuation, as the signal travels through a lossy channel. A simple mathematical model of a channel with attenuation and additive noise is shown in Figure. If the transmitted signal is s(t), the received signal is given by

r(t) = αs(t) + n(t)

where α < 1, and n(t) represents an additive random noise process corrupting the transmitted signal. Physically, the additive noise may arise from electronic components and amplifiers at the receiver of the communication system, or from interference encountered in transmission as in the case of radio-signal transmission. The effect of signal attenuation is to reduce the amplitude of the desired signal s(t) and, thus, to render the information-bearing signal more vulnerable to additive noise.

991_What do you mean by Noise.png

Signal attenuation in many channels can be offset by using amplifiers to boost the signal level during transmission. However, the amplifier also introduces additive noise in the process of amplification, thereby corrupting the signal. The additional noise must also be taken into consideration in the design of the communication system.


Related Discussions:- What do you mean by noise

Problem on pulse code modulation, (a) "Pulse Code Modulation (PCM), as used...

(a) "Pulse Code Modulation (PCM), as used in telephony, samples a signal at 8 kHz using 256 quantization levels". i. Outline how this scheme works with the help of sketches and,

What are difference equations, What are Difference Equations? A continu...

What are Difference Equations? A continuous-time system can be described by differential equations. Likewise, a discrete-time system can be explained by difference equations. T

What is solar water heating, What do you understand by solar water heating ...

What do you understand by solar water heating and discuss different kind of solar water heating based on collector-storage and circulation type. Discuss integrated collector - s

Dc basing bits, Dc basing bits: Operating point: operating is cut off...

Dc basing bits: Operating point: operating is cut off; saturation and linear region of bits character are provided as follow: (1)  Linear-region operation (2)  (1)

Power system, recent trends in power system

recent trends in power system

What is message demodulation, Q. What is Message Demodulation? The majo...

Q. What is Message Demodulation? The major advantage of the conventional (standard) DSB AMsignal transmission is the ease with which the signal can be demodulated. Themessage s

Solar energy, can i use the direct solar energy from solar plate to charge ...

can i use the direct solar energy from solar plate to charge my laptop without a battery

Fly back converter - power supplies, Fly  Back Converter In fly  back ...

Fly  Back Converter In fly  back  converter an inductor is used is  primary winding of transformer. Inductor  stores  the energy when  unregulated DC  input is given  to the

Is the mosfetoperating in the active region, Q. A depletion MOSFET is given...

Q. A depletion MOSFET is given to have large V A , V P = 2.8V, I DSS = 4.3 mA, v DS = 4.5V,and v GS = 1.2V. (a) Is theMOSFEToperating in the active region? (b) Find iD.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd