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空载波对STBC-OFDM系统信道估计性能的影响分析与改进 被引量：1

Performance Analysis and Enhancement of Channel Estimation for STBC-OFDM Systems with Virtual Subcarriers
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摘要 该文分析了空时分组码-正交频分复用(STBC-OFDM)系统中,空载波对基于离散傅里叶变换(DFT)信道估计的性能影响,推导得出空载波影响下信道估计均方误差及误码率的解析式,并提出一种新的信道估计方法,通过时域乘以干扰因子矩阵的逆消除空载波引起的混叠,提高信道估计精度。仿真结果与理论结果相符,且表明改进的信道估计算法有效消除均方误差地板现象,提高系统性能。 Performance of Discrete Fourier Transform （DFT） based channel estimation for Space Time Block Code-Orthogonal Frequency Division Multiplexing （STBC-OFDM） systems with virtual subcarriers is analyzed. The concise expressions for Mean Squared Error （MSE） and corresponding Bit Error Rate （BER） with the effect of virtual subcarriers are provided. Besides, a new channel estimation method based on zero-forcing is presented to eliminate aliasing distortion caused by virtual subcarriers. Simulation results demonstrate the accuracy of the analysis and the efficiency of new method.
作者 王轶 陶小峰 张平
机构地区 泛网无线通信教育部重点实验室(北京邮电大学) 北京邮电大学无线新技术研究所
出处 《电子与信息学报》 EI CSCD 北大核心 2009年第3期640-644,共5页 Journal of Electronics & Information Technology
基金 国家863计划项目(2006AA01Z260) 国家自然科学基金重大项目(NSF60496312)资助课题
关键词 正交频分复用 信道估计 空时分组码 空载波 Orthogonal Frequency Division Multiplexing （OFDM） Channel estimation Space Time Block Code （STBC） Virtual subcarriers
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献15

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二级参考文献14

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共引文献15

同被引文献14

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二级引证文献6

电子与信息学报
2009年 第3期

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