What is meant by pre-emphasis and de-emphasis?

Answer Posted / roz

in the case of FM,higher frequencies are more affected by
noise than the lower ones.so,if the higher frequencies were
to be artificially boosted before transmission and
correspondingly cut at the receiver,the effect would be that
the signals would be much more immune to noise.this
artificial boosting is called pre emphasis and the
corresponding compensation at the receiver is called de emphasis

Is This Answer Correct ?    22 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is load commutation?

613


self supporting course and sandwich course are same

1587


why ac waveform repesented by using sine wave why not others?

1097


Define what is point contact diode?

618


The magnitude of the gain or integrator transfer function using op-amp is A WR1Cf B -1/WR1Cf C -WR1Cf D 1/WR1Cf

1417






Explain why the aspect ratio of tv video display is 4:3 or 16:9? Why not it is any other?

596


i need questions from Govt company asked like BDL, ECIL,HAL,DRDL,BARC and many

2833


What are different categories of antenna and give an example of each?

615


Define what is the mechanism by which conduction takes place inside the semiconductor?

624


y do v use microprocessor for cpu's but not microcontrollers??? adv of mp over mc????

1536


Explain what are the basic logic elements?

659


Magnetostriction is a phenomenon whereby the magnetisation of a ferromagnetic material leads to a change in

604


Why do we use distinct polarisation (UL-H:DL-V) while uplinking and downlinking rather than same (UL-H:DL-H)?

1477


Explain what is the purpose of the package around a microprocessor silicon die?

553


What is a demultiplexer?

565