Rate optimization for IDMA systems with iterative multi-user decoding

Authors:
Tao Yang;Jinhong Yuan;Zhenning Shi
Affiliations:
University of New South Wales, Australia;University of New South Wales, Australia;National ICT Australia, Australia
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 6
Cited 0

Elements of Information Theory (Wiley Series in Telecommunications and Signal Processing)

Elements of Information Theory (Wiley Series in Telecommunications and Signal Processing)
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Interleave division multiple-access

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Jointly gaussian approximation and multi-stage LLR combining in the iterative receiver for MIMO-BICM systems

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Analysis and optimization of CDMA systems with chip-level interleavers

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Abstract

In this paper, we develop a rate allocation scheme for interleave-division multiple-access (IDMA) systems with iterative decoding. We use a fully-analytical approach to predict the performance of the scheme and propose a modified linear programming method to design the rate profile. Numerical results show that with just repetition coding and rate allocation, the performance of the scheme is only about 5 dB away from the capacity for a wide range of SNR, provided that the number of users is sufficiently large. Compared with power allocation schemes for IDMA, the proposed rate allocation scheme achieves a similar performance at a moderate spectral efficiency and the requirement of sophisticated power amplifiers can be relaxed.