| 基于信道估计的SC-FDMA自适应传输方案 |
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| 引用本文： | 张子杰,彭端,张欣,刘高星.基于信道估计的SC-FDMA自适应传输方案[J].微机发展,2012(3):35-38,42. |
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| 作者姓名： | 张子杰 彭端 张欣 刘高星 |
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| 作者单位： | [1]广东工业大学信息工程学院,广东广州510006 [2]广东工业大学实验教学部,广东广州510006 |
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| 基金项目： | 广州市应用基础研究项目（2006J1-C0331）; 广东工业大学博士基金项目（073016） |
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| 摘 要： | 由于SC-FDMA的峰均功率比（PAPR）比OFDMA低,因而被应用于3GPP LTE上行链路。论文分析了SC-FDMA传输系统的数学模型,介绍了基于导频的SC-FDMA系统最小二乘（LS）和线性最小均方误差（LMMSE）信道估计算法。在比较该系统集中式和分布式两种子载波映射方式在高低速不同移动环境下传输性能的基础上,提出了一种基于信道估计的SC-FDMA系统自适应传输方案。经仿真证实该方案比单纯采用一种子载波映射的方法性能更加优越,在相同的误码率情况下,能够节省大概3dB左右的信噪比。
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| 关 键 词： | SC-FDMA 信道估计 自适应 子载波映射 |
An Adaptive Transmission Scheme of SC-FDMA Based on Channel Estimation |
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| ZHANG Zi-jie,PENG Duan,ZHANG Xin,LIU Gao-xing.An Adaptive Transmission Scheme of SC-FDMA Based on Channel Estimation[J].Microcomputer Development,2012(3):35-38,42. |
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| Authors: | ZHANG Zi-jie PENG Duan ZHANG Xin LIU Gao-xing |
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| Affiliation: | 1.Information Engineering College,Guangdong University of Technology,Guangzhou 510006,China; 2.Experimental Center,Guangdong University of Technology,Guangzhou 510006,China) |
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| Abstract: | SC-FDMA is used in uplink of 3GPP LTE because its PAPR is lower than OFDMA.It analyses the mathematical model of SC-FDMA transmission system,and introduces the Least-Square（LS） and Linear Minimum Mean-Square Error（LMMSE） channel estimation algorithm based on pilot with SC-FDMA system.Moreover,based on a comparison of the transmission performance between two subcarrier mapping methods of this system in different mobile environment,an adaptive transmission scheme based on channel estimation of SC-FDMA system is proposed.The simulation results show that the scheme＇s performance is better than the method which uses a single subcarrier mapping.In the same BER situation,the proposed scheme can save about 3dB SNR. |
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| Keywords: | SC-FDMA channel estimation self-adaptation subcarrier mapping |
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