Communication System Fundamentals
Communication
Communication is the process of exchanging information
Electronic Communication
A communication which takes place in the form of electronic or electrical signals
Electronic Communication System
It consist of transmitter, receiver and communication channel or medium
Communication Channel / medium / media
It is a path by which electronic signal is sent from one place to another place
It may be
- Electrical conductor
- Optical media
- Free space
Frequency
Cycle per second is called frequency
Wavelength
It is the distance covered by one cycle
Modulation and Demodulation
Modulation is a process in which we transmit low-frequency signal over a high-frequency signal
Demodulation is the reverse process
Baseband Transmission and Broadband Transmission
Transmission of information without modulation is baseband
Transmission of information with modulation is broadband
Reasons for modulation
- Data rate
- Antenna size
- Long distance communication
Noise
Noise is a term which applies to any phenomenon that is used to degrade the message or information.
Attenuation
It is proportional to the distance between transmitter and receiver
Dear Salman,
its been long time since you uploaded new lecture for any topic. did you left?
hope to get your response soon.
Dear due to little busy schedule i did not upload any video. i will start it again after 1 or 2 weeks
Dear Salman,
its been long since you uploaded new lecture for any topic. did you left?
hope to get your response soon.
Dear Salman bhai,
Masha Allah I really appreciate your efforts to exchange very informative materials and the way you deliver knowledge is very nice and easy to understand. Please keep it up good work. I would like to request may you please start videos on PTCL Telephone Network also BroadBand Int etc. Thanks for your time.ernet
Dear Salman bhai,
Masha Allah I really appreciate your efforts to exchange very informative materials and the way you deliver knowledge is very nice and easy to understand. Please keep it up good work. I would like to request may you please start videos on Fiber Optics technologies like SDH/SONET DWDP and Metroethernet etc. Thanks for your time.
Thanks, SDH is my next target.May be in one week.
I want to join
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