Modulation Techniques

References related to modulation formats such as AM, FM, PSK and QAM.
View the WikiPedia article on modulation
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Online RF Technology Certification

Author
Besser Associates

This online program has been designed for applications, production, manufacturing engineers and technicians as well as other professionals who need to have a solid background in the fundamentals of working with RF and wireless products. This four part program provides a thorough understanding of RF analytical tools, communications signals, RF devices and test instruments. Starting with basic analytical tools such as the decibel scale, S-parameters and the Smith Chart, this program covers test instrumentation, RF components, and modulation.

Foundations of Green Communications

Author
Earl McCune

Until now, the focus in developing wireless communications formats has been almost exclusively on using novel techniques to overcome specific channel impairments (i.e. multipath, selective fading, etc). What has been missing is an assessment of the overall energy efficiency of the final hardware that is to be deployed. This paper introduces this type of analysis.

Live and On-Demand RF/Wireless Courses from Besser Associates

Author
Besser Associates

On-demand courses are now available from Besser Associates. Tutorials and courses range from one to eight hours in length. Topics include:

  • GaN Power Amplifiers
  • EMC/Shielding/Grounding Techniques for Chip & PCB Layout
  • Introduction to Radio Receivers
  • RF Technology Certification
  • Introduction to Impedance Matching
  • RF and Wireless Made Simple On-demand

Wireless Communications Resources Collection

Author
Circuit Design Inc. (Japan)

A collection calculators, such as:

  • Wave propagation calculation tool (for free-space and 2 wave model)
  • Fresnel zone calculation tool
  • Okumura-Hata curve calculation tool
  • Creating a channel plan in order to avoid third-order intermodulation interference and the near-far problem tool
  • Height pattern calculation tool
  • Mutual conversion of decibel value and true value

Web apps are utilized in the tutorials to allow you to experiment with the concepts

FM Modulation Tutorial Applets

Author
Circuit Design Inc. (Japan)

This tutorial and accompanying applet allow you to experiment with FM parameters and see the results at different stages of demodulation. Of particular interest is the applet showing the output spectrum for an adjustable modulation index, based on the values of the Bessel functions for the various sidebands.

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