Rate optimization for IDMA systems with iterative joint multi-user decoding

Tao Yang; Jinhong Yuan; Zhenning Shi

doi:10.1109/TWC.2009.080438

Rate optimization for IDMA systems with iterative joint multi-user decoding

Tao Yang^*, Jinhong Yuan, Zhenning Shi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

In this letter, 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. Then, we propose a modified linear programming method to find the best rate profile for the scheme. Numerical results show that with just repetition coding and optimal 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.

Original language	English
Article number	4801462
Pages (from-to)	1148-1153
Number of pages	6
Journal	IEEE Transactions on Wireless Communications
Volume	8
Issue number	3
DOIs	https://doi.org/10.1109/TWC.2009.080438
Publication status	Published - Mar 2009

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abstract = "In this letter, 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. Then, we propose a modified linear programming method to find the best rate profile for the scheme. Numerical results show that with just repetition coding and optimal 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.",

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author = "Tao Yang and Jinhong Yuan and Zhenning Shi",

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AB - In this letter, 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. Then, we propose a modified linear programming method to find the best rate profile for the scheme. Numerical results show that with just repetition coding and optimal 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.

KW - CDMA

KW - Iterative decoding

KW - Multi-user detection

KW - Power allocation

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Rate optimization for IDMA systems with iterative joint multi-user decoding

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