Improved SNR Evolution for OFDM-IDMA Systems

被引：6

作者：

Dang, Jian ^{[1
]}

Yang, Liuqing ^{[2
]}

Zhang, Zaichen ^{[1
]}

机构：

[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China

[2] Colorado State Univ, Dept Elect & Comp Engn, Ft Collins, CO 80523 USA

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2012年 / 1卷 / 02期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

OFDM-IDMA; SNR evolution; lower bound;

D O I：

10.1109/WCL.2012.011712.110245

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The bit error rate performance of interleave division multiple access (IDMA) based systems can be predicted by signal-to-noise ratio (SNR) evolution which tracks the average symbol SNR at each iteration and provides a faster solution than brute-force simulations. As the desired SNR in the evolution procedure is hard to obtain, approximate SNR updating formula has been widely adopted in the literature. In this paper a revised SNR updating formula is proposed for orthogonal frequency division multiplexing interleave division multiple access (OFDM-IDMA) systems in Rayleigh fading channels. Theoretical analysis shows that the new updating formula provides a tighter lower bound of the expected SNR in the evolution procedure compared with the existing one. We then verified this by simulations.

引用

页码：65 / 68

页数：4

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