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8 - Multicarrier Digital Modulation

Published online by Cambridge University Press:  aN Invalid Date NaN

Tolga M. Duman
Tolga M. Duman
Affiliation:
Bilkent University, Ankara
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Summary

Frequency-shift keying (FSK) is described as an alternative way of transmitting digital information. Specifically, orthogonal FSK with both coherent and non-coherent detection is studied. Minimum-shift keying is introduced as a special case of FSK, preserving phase continuity at the symbol boundaries. In addition, orthogonal frequency-division multiplexing (OFDM) is covered in some depth. It is shown that OFDM can be efficiently implemented using fast Fourier transform (FFT) and its inverse. The use of a cyclic prefix to avoid intersymbol interference over dispersive channels is also shown.

Keywords

Frequency-shift keyingcoherent detection of FSKnon-coherent detection of FSKminimum-shift keyingorthogonal frequency-division multiplexingcyclic prefix addition
Type
Chapter
Information
Fundamentals of Digital Communication Systems , pp. 318 - 344
Publisher: Cambridge University Press
Print publication year: 2025

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