Accession Number:

ADA265232

Title:

Trellis Coded Modulation Applied to Orthogonal Signals

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1993-03-01

Pagination or Media Count:

61.0

Abstract:

A method for the design of trellis codes for coherent detection of orthogonal signals in additive white Gaussian noise AWGN channels is presented. This method utilizes the landmark works of Ungerboeck in trellis coded modulation TCM. After examining the channel capacity, it is shown that a coding method requiring the same bandwidth efficiency for the orthogonal signal space and maximum likelihood ML soft decoding using the Viterbi algorithm can achieve large asymptotic coding gains. Several codes are analyzed using Ungerboecks technique of set-partitioning and mapping, then applying the analytic code description method of Calderbank and Mazo to M-ary frequency shift keying M-FSK. The general finding of this paper is that relative to uncoded modulation, asymptotic coding gains of 3-4 dB can be achieved.... Trellis coded modulation, Orthogonal signals, M-ary frequency shift keying, Viterbi algorithm

Subject Categories:

  • Computer Programming and Software
  • Radio Communications
  • Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE