DATA
COMMUNICATION
Lecture-27
Docsity.com
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Frequency Ranges and Communication Systems: Microwave, Satellite, and Cellular Telephony, Slides of Data Communication Systems and Computer Networks
An overview of different frequency ranges used in communication systems, focusing on microwave, satellite, and cellular telephony. It discusses the propagation of radio waves, frequency bands, and transmission impairments such as attenuation and distortion.
Typology: Slides
2011/2012
1 / 34
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Frequency Ranges and Communication Systems: Microwave, Satellite, and Cellular Telephony and more Slides Data Communication Systems and Computer Networks in PDF only on Docsity!
DATA
COMMUNICATION
Lecture-
Recap of Lecture 26
Guided Media
Optical Fiber Cable
Unguided Media
Radio Frequency Allocation
Propagation of Radio Waves
Frequency Ranges
The type of propagation used in radio
transmission depends upon the frequency of the signal
Very Low Frequency (VLF)
Middle Frequency (MF)
High Frequency (HF)
Ultra High Frequency (UHF)
Ultra High Frequency (UHF)
Extremely High Frequency
(EHF)
Terrestrial Microwave
Microwaves do not follow the curvature of earth
Line-of-sight transmission
Height allows the signal to travel farther
Terrestrial Microwave
Antennas
Satellite Communication
Line-of-sight microwave
communication using satellite
Satellite acts as a very tall antenna
and a repeater
Geosynchronous Satellites
Satellite Frequency Bands
Each satellite sends and receives over two bands
- Uplink: From the earth to the satellite
- Downlink: From the satellite to the earth