A selection combining for OFDM system in Nakagami fading channels

被引：0

作者：

Zhang, Youyan ^{[1
]}

Hong, Shuyue ^{[2
]}

机构：

[1] College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, JinHua Zhejiang

[2] Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, HangZhou

来源：

Advances in Information Sciences and Service Sciences | 2012年 / 4卷 / 13期

关键词：

Diversity; Log-likelihood ratio; Nakagami fading channel; OFDM;

D O I：

10.4156/AISS.vol4.issue13.39

中图分类号：

学科分类号：

摘要：

Orthogonal frequency-division multiplex(OFDM) is an effective technique for high-speed data transmission and spectral efficiency in frequency selective fading channels. In this paper, we study a scheme combining branches with log-likelihood ratio which could gain better error probability performance under the same conditions of modulation system than with signal-to-noise ratio in OFDM system. Due to greater flexibility and accuracy in modeling the actual wireless environment, the Nakagmi fading channels are modeled. The expressions of the rule based on log-likelihood ratio in MIMO-OFDM system over Nakagmi fading channels are derived. Simulation results show that the performance of system with log-likelihood ratio is superior to signal-to-noise ratio on the error probability. With the increase of the combining branches and fading parameters, the performance of MIMO-OFDM system is improved significantly.

引用

页码：315 / 321

页数：6

共 13 条

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