Principles of communication systems
Communication systems, block diagram of 'real time' communication system.
mtaimg/images/sections/909/909-1-1.png/mtaimg
Only the purpose of each stage is required.
Principles of communication systems
Communication systems, block diagram of 'real time' communication system.
mtaimg/images/sections/909/909-1-1.png/mtaimg
Only the purpose of each stage is required.
Transmission media
Transmission-path media: metal wire, optic fibre, electromagnetic (radio, microwave).
Ground wave, refraction and reflection of sky waves, diffraction of long-wavelength radiation around the Earth’s surface.
Satellite systems and typical transmission frequencies.
Students should recognise that up-links and down-links require different frequencies so that the receivers are not de-sensed.
Advantages and disadvantages of various transmission media. Students should consider data transmission rate, cost, and security issues.