Title page for ETD etd-11072008-063438


Type of Document Master's Thesis
Author Lin, Xu
URN etd-11072008-063438
Title Trellis-coded permutation modulation for improved performance of narrowband noncoherent FSK
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
No Advisors Found
Keywords
  • trellis
  • permutation
  • modulation
  • coding
  • noncoherent
Date of Defense 1996-05-05
Availability restricted
Abstract

Noncoherent modulation is an important technique in wireless communication systems. Although noncoherent modulation usually does not perform as well as its coherent counterpart it is practical and useful in some applications, such as paging systems. In this thesis we investigate ways to improve the performance of noncoherent FSK in narrowband channels.

It is shown that FSK permutation modulation has better spectral efficiency than conventional FSK modulation" but with the tradeoff on reduced energy efficiency. To overcome this problem, we apply trellis-coded modulation (TCM) , which is a combined technology of convolutional coding and modulation, to FSK permutation. TCM was originally designed for coherent modulation. The application of TCM to permutation modulation retains the fundamental concepts of TCM. The simulation results show that trellis-coded permutation modulation provides a better combination of energy efficiency and spectral efficiency than conventional FSK noncoherent demodulation.

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