Wireless Communication - Two: Electromagnetic Wave Properties
This is the second in a series of computer science lessons about wireless communication and digital signal processing. In these lessons you’ll learn about the nature of electromagnetic radiation, digital modulation and multiplexing techniques, and how to get the best out of mobile communication systems such as LTE, 5G and WiFi.
This lesson takes a brief look at the properties and behaviours of electromagnetic waves. It begins with a description of the well-known bands of the electromagnetic spectrum including cosmic rays, gamma rays, x rays, ultraviolet, infrared, visible light, microwaves and of course radio waves. The lesson then describes effects such as reflection, scattering, diffraction, refraction and absorption. In particular the impact of these effects on the propagation of radio signals is discussed.
Chapters:
00:00 The electromagnetic spectrum
02:36 Reflection
03:03 Scattering
03:25 Sky waves
03:41 Diffraction
04:40 Refraction
05:32 Tropospheric ducting
05:53 Absorption
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