Recognition of Analogue Modulations

  • Elsayed Elsayed Azzouz
  • Asoke Kumar Nandi
Chapter

Abstract

The current trend in modern communication systems is the use of digital modulation types rather than the analogue ones. However, the analogue modulations are still in use especially in the third world countries. So, the aim of this chapter is to discuss some of the available analogue modulation recognisers and to introduce some quick and fast algorithms for the well known analogue modulation types. The analogue modulation types that can be classified with the developed algorithms, introduced in this chapter, are: AM (with different modulation depths (60% and 80%)), DSB, VSB, LSB, USB, FM (with different modulation indices (5 and 10)), and combined modulated signals (with different modulation depths and different modulation indices). Furthermore, a non-intelligible simulated speech signal is used as a modulating signal for simulating the different types of analogue modulations to increase the degree of realism.

Keywords

Instantaneous Frequency Modulation Depth Analogue Modulation Modulation Recognition Instantaneous Amplitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Elsayed Elsayed Azzouz
    • 1
  • Asoke Kumar Nandi
    • 2
  1. 1.Department of Electronic & Electrical EngineeringMilitary Technical CollegeCairoEgypt
  2. 2.Department of Electronic & Electrical EngineeringUniversity of StrathclydeGlasgowUK

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