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：
中国国家自然科学基金; 美国国家科学基金会;
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
收藏
页码：65 / 68
页数：4
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