8-PSK trellis codes on Rayleigh channel

Ephraim Zehavi

Research output: Contribution to conferencePaperpeer-review

15 Scopus citations


Trellis-coding techniques are considered as a means of improving the reliability of 8-PSK (phase-shift keying). It is shown that the combination of a rate 2/3 convolutional code and 3-b interleavers provides a good modulation/coding method for the Rayleigh channel. The author proposes a suboptimal coded system that combines a regular convolutional code, bit interleaving, and an appropriate decoding technique. The bounds on the error performance of this approach indicate that the best convolutional code in conjunction with 8-PSK modulation and appropriate soft-decision metric is an attractive means of improving the reliability. In particular, over a Rayleigh channel this system requires Eb/N0 of about 14.5 dB to provide a bit-error rate of 10-5 (for a code with 64 states), which is 1.2 dB less than the requirement for the baseline system, which uses the optimal trellis codes for the Rayleigh channel.

Original languageEnglish
Number of pages5
StatePublished - 1989
Externally publishedYes
EventIEEE Military Communications Conference - MILCOM '89. Part 1 - Boston, MA, USA
Duration: 15 Oct 198918 Oct 1989


ConferenceIEEE Military Communications Conference - MILCOM '89. Part 1
CityBoston, MA, USA


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