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Analog and Digital Communications by Sudakshina Kundu

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CHAPTER 8

Angle Modulation Techniques

Chapter Outline

Learning Objectives

  • Introduction to Angle Modulation and Bandwidth Requirement.
  • Generation of Angle-Modulated Carrier—phase and Frequency Modulation for Narrowband (NB) and Wideband (WB).
  • Reactance Modulator Circuits.
  • Detection of Angle Modulation—slope Detector, Foster-Seeley Discriminator, Ratio Detector, Phase-locked Loop

8.1 Introduction

We have seen earlier that for angle modulation the carrier signal, which is a pure sinusoid represented as Sc(t) = Ac sin (ωct + θ) with φ (t) = (ωct + θ) as the argument or angle, the instantaneous ...

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