| OFDM在LMS信道下的BER性能研究 |
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| 引用本文： | 姚宏伟,井庆丰.OFDM在LMS信道下的BER性能研究[J].计算机技术与发展,2014(6):218-222. |
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| 作者姓名： | 姚宏伟 井庆丰 |
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| 作者单位： | 南京航空航天大学航天学院,江苏南京210016 |
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| 基金项目： | 国家自然科学基金（61102069）; 中央高校基本科研业务费专项资金资助; 南京航空航天大学研究生创新基地（实验基地）开放基金资助项目（kfjj120219）; 南京航空航天大学基本科研业务费（NN2012022） |
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| 摘 要： | 正交频分复用（OFDM）应用于卫星宽带通信,前提需建立适用的卫星信道模型,目前常用的卫星信道模型主要为窄带模型,因而宽带系统性能分析的基础,首先得建立卫星信道宽带模型。对已有陆地移动卫星（LMS）信道模型进行研究,提出了一种便于仿真实现的四状态宽带信道模型,以此仿真得到OFDM在LMS信道下的BER性能结果。结果表明,宽带状态和窄带状态下BER性能变化较大,在不同环境下的BER性能亦有不同,可将该模型应用于卫星宽带通信的研究分析。
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| 关 键 词： | 正交频分复用 卫星移动通信 阴影衰落 多径衰落 马尔可夫链 误比特率 |
Research on BER Performance of OFDM under LMS Channel |
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| YAO Hong-wei,JING Qing-feng.Research on BER Performance of OFDM under LMS Channel[J].Computer Technology and Development,2014(6):218-222. |
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| Authors: | YAO Hong-wei JING Qing-feng |
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| Affiliation: | ( College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China) |
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| Abstract: | Using OFDM in satellite wideband communication needs a suitable wideband satellite channel model.At present commonly used models are narrowband ones.The performance analysis of wideband system is based on the correct design of a channel model.Research the existed LMS channel model,and propose a 4-state wideband channel model to get the BER performance of OFDM in LMS channel.The results from simulation demonstrate that BER performance of the wideband state differs from that of the narrowband state.The BER performance of different environments also differs from others＇.This model is suitable for studying satellite wideband communication. |
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| Keywords: | OFDM satellite mobile communication shadow fading multipath fading Markov chain BER |
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