what is need of modulation & de-modulation in communication?
- 6 Answers
- 6915 Views
- I also Faced
- E-Mail Answers
Answer Posted / daniel joel
modulation is the process of changing the characteristics of
high frequency signal (carrier signal) like
amplitude,phase,frequency with reference to a low frequency
signal(message signal).
Need of modulation is 1.To decrease the antenna height
*to transmit a low frequency signal we need height of
antenna to be very large(since wavelength is inversly
proportional to frequency.so if we modulate a low frequency
signal with a high frequency one then it requires antenna
height of just meters,which is practically possible.
2.To avoid interference in the channel we adopt modulation.
3.To overcome noise in the channel.
Demodulation is necessary to retrive back the message signal
from modulated signal.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
Guroscope works on the basis of what?
Any idea of BSNL, JTO paper?
Explain About RRC states
Give an Example for negative feedback and positive feedback?
what is main difference between gsm & cdma
y u looking for a job in it field sinc u r a ece graduate.
Why common-collector circuit is known as an emitter follower?
write test cases for cases
Can Somebody tell me what should i do if i hadn't filled form for the next mahagenco exam for any new vaccency. if any one can provide me contact email to mail some one at mahagenco office, please mail me if any thing you can do on pratikgupta05yahoo.in
What is meant by step-down cyclo-converters?
how can i prepare for the apgenco can u send old qps to jeedipally@gmail.com
Define what is the conductivity of perfect dielectric?
Give some examples of power electronics applications in the day-to-day life?
Define modulation.
what are the Technical Specifications of D/240SC-T1
