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) : Stevens, Janet E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265232.pdf


Report Date : Mar 1993


Pagination or Media Count : 61


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 Ungerboeck's 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


Descriptors :   *WHITE NOISE , *CODING , *DIGITAL COMMUNICATIONS , ALGORITHMS , GAUSSIAN NOISE , SIGNALS , BANDWIDTH , DECODING , FREQUENCY SHIFT , CHANNELS , MODULATION , NOISE , THESES , EFFICIENCY , DETECTION


Subject Categories : Computer Programming and Software
      Radio Communications
      Command, Control and Communications Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE