Wireless Communication - One: Electromagnetic Wave Fundamentals

This is the first 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 describes the nature of electromagnetic waves in terms of oscillating electric and magnetic fields. It explains how electromagnetic waves can be generated by means of a half wave dipole antenna and defines fundamental terminology such as amplitude, wavelength, frequency and phase. The effects of linear superposition of electromagnetic waves, such as constructive and destructive interference are described, along with the implications of interference effects on the reception of radio signals.
Chapters:
00:00 What are electromagnetic waves?
02:04 Dipole antenna
02:47 WiFi Access Point placement
03:05 Visualising electromagnetic waves
04:01 Amplitude
05:24 Wavelength
05:51 Frequency
06:15 Sine wave and the unit circle
07:11 Phase
08:41 Linear superposition
11:12 Radio signal interference

[@felixgep2608]

Thank You very much for your videos! I am trying to get into computer science and these videos really help! Just one little thing I have noticed: I am pretty sure, that not the acceleration of electrons produces a magnetic field, but the velocity. I know, this is not really relevant for the video, I just want to prevent confusion. Please keep up your good work, it is very appreciated! Greetings from Austria

[@youtube_username_]

OMG I love these graphics so much - that last image is especially charming.

[@nero1375]

Thank you Professor! Cheers from Brazil!

[@ComputerScienceLessons]

You're most welcome :)KD

[@ahmadfahim7283]

Keep up the great work sir! Thank you so much!

[@ComputerScienceLessons]

Thank you. I have about 6 videos in the series ready to record - building up to modern multiplexing techniques. I'm trying to keep the heavy mathematics out of it :)KD

[@ahmadfahim7283]

@erScienceLessons My background in mathematics is quite solid as I study EEE. I will eagerly learn and understand them all! Have a nice day! Great to see people like you spreading knowledge without any hesitation!

[@CheragHakeem-bp2bb]

❤❤❤

[@ComputerScienceLessons]

Thank you :)KD

[@CheragHakeem-bp2bb]

sir make a complet playlist

[@sorongana5346]

This is a truly great channel isn't it?

[@ComputerScienceLessons]

I have about 6 videos in this series ready to record - building up to modern multiplexing techniques like OFDM. I'm trying to keep the mathematics out of it :)KD

[@otopa5]

Welcome back Sir, Kindly complete the C# series. I've been waiting and waiting and waiting...

[@ComputerScienceLessons]

I hope to upload another C# video (about array variables) next week. :)KD

[@yahyaa4499]

Is this computer science or computer engineering?
If it is the latter, how far does Computer engineering extend further?

[@ComputerScienceLessons]

I think the lines between computing, engineering, mathematics and physics are blurred. Indeed, you could say that yours is a philosophical question :)KD

[@bettymalone3769]

Promo_SM 🎶