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

Unconditional jump - jump instruction , Unconditional Jump JMP ( Uncon...

Unconditional Jump JMP ( Unconditional Jump ) Instruction: This  instruction is used to transfer  the execution to the  specified  memory  address unconditionally ( does not c

Principles for implementation of strategy in organization, Principles for I...

Principles for Implementation of Strategy in an Organization Organization required focusing on five principles for the successful implementation of strategy. Organizations wil

Evaluate the voltage gain, Q. On a CD amplifier R s = 4k?, µ =50 and r =35...

Q. On a CD amplifier R s = 4k?, µ =50 and r =35k?. Evaluate the voltage gain A v . A v = V o /V i = µRs / (µ+1)Rs + r

Obtain an expression for the total pulling force on the bar, A magnetic cra...

A magnetic crane used for lifting weights can be modeled and analyzed as a simple magnetic circuit, as shown in Figure. Its configuration consists of two distinct pieces of the sam

Define byte assembler directive, What do you understand by DB assembler...

What do you understand by DB assembler directive?   DB (Define Byte): The DB directive explains by a byte-type variable (that is a variable that occupies one byte of memo

Find the new operating point in transistor, Q. A transistor in a fixed bias...

Q. A transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60.if IB of transistor is equal to 100 microampere and collecto

Define the term real time clock, Define the term real time clock. A re...

Define the term real time clock. A real-time clock maintains the time in real time, which is, in hours and minutes. For the real-time clock the software contains an interrupt

Ral rotate accumulator left through carry instruction , RAL Rotate Accumula...

RAL Rotate Accumulator Left Through Carry Instruction This  instruction rotates the content  of the accumulator  towards left by one bit. The D 0 bit moves to D 1   bit moves

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