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1 results

  • 8 - Multicarrier Digital Modulation

  • Tolga M. Duman, Bilkent University, Ankara
  • Book:
    Fundamentals of Digital Communication Systems
    Print publication:
    23 January 2025, pp 318-344

  • 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.