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Last updated:

April 20, 2022

Duration:

Unlimited Duration

FREE

This course includes:

Unlimited Duration

Badge on Completion

Certificate of completion

Unlimited Duration

Description

This course, Exploring communications technology, looks at some of the principles underpinning communications technology.

It looks at the properties of signals and media (such as optical fibre and radio waves), error control, data compression, and the principles of 4G mobile communications, wi-fi and DSL broadband.

Course learning outcomes

After studying this course, you should be able to:

  • Demonstrate an understanding of the principles of, and reasons for, carrier-wave modulation, and its application to Quadrature Amplitude Modulation
  • Demonstrate an understanding of the roles of error detection and error correction, and be able to perform calculations involving checkeck digits and coding rates
  • Demonstrate an understanding of the basic techniques of perceptual coding and the reasons for their use
  • Demonstrate an understanding of how the use of multiple OFDM subchannels enables efficient use of communications channels in mobile communications, broadband and wifi.

Course Curriculum

  • Introduction 00:10:00
  • Learning outcomes 00:10:00
    • Signals and modulation 00:10:00
    • Periodic signals 00:20:00
    • Non-periodic signals 00:10:00
    • Digital signals and modulation 00:15:00
    • Amplitude-shift keying (ASK) 00:25:00
    • Frequency-shift keying (FSK) 00:10:00
    • Phase-shift keying (PSK) 00:20:00
    • Quadrature amplitude modulation (QAM) 00:20:00
    • Bandwidth 00:15:00
    • Summary 00:10:00
    • Error control 00:25:00
    • EAN-13 code and error detection 00:45:00
    • Reed-Solomon codes and error correction 00:20:00
    • Reed-Solomon codes and error correction continued 00:30:00
    • Summary 00:07:00
    • Introduction 00:15:00
    • Sampling and quantisation 00:15:00
    • Quantisation 00:20:00
    • Perceptual encoding 00:15:00
    • MPEG audio layer 3 (MP3) 00:20:00
    • MP3 continued 01:00:00
    • MPEG-4 AAC (advanced audio coding) 00:30:00
    • Image and video compression 00:10:00
    • Summary 00:10:00
    • Broadband, mobile and WiFi 00:07:00
    • Introduction; access and core networks 00:15:00
    • Orthogonal frequency division multiplexing (OFDM) 00:15:00
    • Digital Subscriber Line (DSL) broadband 00:20:00
    • VDSL2 00:20:00
    • 4G mobile broadband 00:30:00
    • WiFi 00:20:00
    • WiFi maximum transmission rate 00:15:00
    • WiFi multiple access 00:15:00
    • Summary 00:15:00
    • Conclusion 00:10:00

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