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Trellis-hopping Turbo Coding

Research output: Contribution to journalJournal article

Published
  • J. Castiñeira; Moreira
  • D. M. Petruzzi
  • M. C. Liberatori
  • B. Honary
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<mark>Journal publication date</mark>12/2006
<mark>Journal</mark>IEE Proceedings - Communications
Issue number6
Volume153
Number of pages10
Pages (from-to)966-975
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present a turbo coding scheme whose constituent codes are designed using convolutional encoders with time-varying coefficients. These encoders are finite state sequence machines that operate over the Galois field GF(q). The scheme includes an encryption polynomial whose coefficients are changed periodically by means of a user key. The trellis coding procedure thus hops from one trellis to another, following a random sequence taken over a set of subtrellises which correspond to different convolutional encoders. The proposed scheme is introduced as a turbo code with encryption properties, and is presented in two forms, the systematic and the nonsystematic schemes.