Soft-decision Viterbi decoding with diversity combining

T. Sakai, K. Kobayashi, S. Kubota, M. Morikura, S. Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Diversity combining methods for convolutional coded and soft-decision Viterbi decoded channels in mobile satellite communication systems are evaluated. Computer simulations confirm that the pre-Viterbi-decoding maximal-ratio combining method has better performance than other methods in Rician fading channels. Bit error probability performances derived from the analysis model using the probability density function of Rician fading and the bit error probability performance of Viterbi decoding in additive white Gaussian noise (AWGN) channels are shown to agree with the simulation results. The diversity method is applied to trellis-coded 8PSK modulation and coherent detection/differential detection, and their performances are compared with conventional QPSK modulation and coherent detection with high-coding-rate and high-coding-gain Viterbi decoding. QPSK with high-coding-rate Viterbi decoding can be an attractive candidate for mobile satellite systems as well as trellis-coded 8PSK.

Original languageEnglish
Title of host publicationGLOBECOM '90
PublisherPubl by IEEE
Number of pages5
ISBN (Print)0879426322
Publication statusPublished - 1990
Externally publishedYes
EventIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3) - San Diego, CA, USA
Duration: 1990 Dec 21990 Dec 5

Publication series

NameIEEE Global Telecommunications Conference and Exhibition


OtherIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3)
CitySan Diego, CA, USA

ASJC Scopus subject areas

  • General Engineering


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