Iterative switched-decoding for interleave-division multiple-access systems

Yi Hong, Lars K. Rasmussen

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Abstract

We consider an interleave-division multiple-access (IDMA) system with multiple users transmitting over a shared additive white Gaussian noise channel. At the transmitter, the information sequence of each user is encoded by a low rate code, corresponding to the concatenation of a convolutional code and a repetition code. We propose an iterative partial decoding scheme, where a receiver only decodes parts of the joint concatenated repetition-convolutional code at the first few iterations, before progressively including more and more code structure into the decoding process. By decoding only parts of the concatenated code, the resulting extrinsic information transfer (EXIT) curve for the partially decoded code is different from the EXIT curve for the fully decoded code. To demonstrate the general scheme, we focus on an iterative switched-decoding scheme in which a receiver only decodes the repetition code at a fixed initial number of iterations, and switches to decode the entire joint repetition and convolutional code. It is shown by simulation that the proposed scheme guarantees fast decoding convergence at low decoding complexity.

Original languageEnglish
Title of host publication8th Australian Communication Theory Workshop, AusCTW 2007
Pages76-81
Number of pages6
Publication statusPublished - 1 Dec 2007
Externally publishedYes
EventAustralian Communications Theory Workshop 2007 - Adelaide, Australia
Duration: 5 Feb 20077 Feb 2007
Conference number: 8th

Publication series

Name8th Australian Communication Theory Workshop, AusCTW 2007

Conference

ConferenceAustralian Communications Theory Workshop 2007
Abbreviated titleAusCTW 2007
CountryAustralia
CityAdelaide
Period5/02/077/02/07

Cite this

Hong, Y., & Rasmussen, L. K. (2007). Iterative switched-decoding for interleave-division multiple-access systems. In 8th Australian Communication Theory Workshop, AusCTW 2007 (pp. 76-81). (8th Australian Communication Theory Workshop, AusCTW 2007).