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

What is a bode plot and what are i''s uses, Q. (i) What are the different t...

Q. (i) What are the different types of plots for frequency response in an RC coupled amplifier?     (ii) What is a Bode Plot? What are it's uses? The different types of

Jump instruction - branch operations , Jump Instruction There are two ...

Jump Instruction There are two types of jump  instruction unconditional jump conditional jumps

Excess3 to bcd code converter using nand gates, design a excess3 to bcd cod...

design a excess3 to bcd code converter using only nand gates

Compute number of electrons and find their average velocity, Q. A wire with...

Q. A wire with n = 10 30 electrons/m 3 has an area of cross section A = 1mm 2 and carries a current i = 50 mA. Compute the number of electrons that pass a given point in 1 s, an

Different kinds of high-tension fuses and low-tension fuses, Q. Different k...

Q. Different kinds of high-tension fuses and low-tension fuses ? Ans: There are two kinds of fuses they are a) L.V Fuses - 1) HRC cartridge fuses.   - 2) Semi enclosed re

Example of binary subtraction - positive number , Example  of binary  sub...

Example  of binary  subtraction - positive number Case 1.   Positive  number is more than negative number ( i e, answer is positive)   Example   subtract  4510 ( 1011012

Define some applications of digital counters, Define some Applications of D...

Define some Applications of Digital Counters? Digital counters are extremely useful in many applications. They can be effortlessly found in digital clocks and parallel-to-seri

D flip flop - introduction to microprocessors, D Flip Flop As we have ...

D Flip Flop As we have seen  in the SR flip flop  when the inputs  S= R  are applied the forbidden or indeterminate state occurs.  This state can destabilize the SR file flop.

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