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Below please find a list of definitions for the term that
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What is Constellation Diagram

Chapter 23

Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications

Is a graphical representation of a signal components modulated by a digital modulation scheme. It displays the signal as a two-dimensional scatter diagram in the complex plane at symbol sampling instants. It represents the possible symbols that may be selected by a given modulation scheme as points in the complex plane.

Published in Chapter:

Modulation Recognition for Software Defined Radio Signal

Sudhar Sophia (Sri Krishna College of Engineering & Technology, India), M. Madheswaran (Muthayammal College of Engineering, India), and S. Sasikumar (Hindustan College of Engineering & Technology, India)

Source Title: Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications

DOI: 10.4018/978-1-61520-655-1.ch023

Abstract

Software Defined Radio (SDR) is the foundation for universal wireless devices. To realize SDR system, the parameters like carrier frequency, symbol rate, and modulation scheme should be reconfigured by the adaptive receiver. Automatic modulation recognition (AMR) algorithm has to identify the modulation scheme of a transmitted signal with a high probability of success within a short observation time. Blind recognition algorithms are useful in identifying the modulation type without any prior knowledge of the transmitted signal parameters. The blind modulation detection determines the type of modulation within the information conveyed by the least possible number of received samples. Therefore, the objective is to make use of the distribution of data or errors to make a statistical inference about type of modulation used.

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