| OFDM系统中一种低复杂度的信道估计算法 |
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| 引用本文： | 胡蝶,周小林. OFDM系统中一种低复杂度的信道估计算法[J]. 数据采集与处理, 2010, 25(6): 677-682 |
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| 作者姓名： | 胡蝶 周小林 |
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| 作者单位： | 复旦大学通信科学与工程系; |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金，上海市教育委员会和上海市教育发展基金会"晨光计划"，国家科技重大专项 |
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| 摘 要： | 提出一种适用于正交频分复用(Orthogonal frequency division multiplexing,OFDM)系统的低复杂度信道时域响应估计算法.在发送端,算法基于最小均方误差(Mean-square error,MSE)准则以及给定的导频分布对导频功率及相位进行设计;在接收端,算法直接对接收到的导频符号进行求和,通过对求和结果进行简单加权后得到信道时域响应的估计.由于该算法在估计信道时只需进行很少量的复数乘法运算,因此接收端的计算复杂度非常低.理论分析与仿真结果表明,当信道时不变或慢时变时,该算法具有较小的估计均方误差.
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| 关 键 词： | 正交频分复用 信道估计 导频设计 |
Low-Complexity Channel Estimation Method for OFDM Systems |
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| Hu Die,Zhou Xiaolin. Low-Complexity Channel Estimation Method for OFDM Systems[J]. Journal of Data Acquisition & Processing, 2010, 25(6): 677-682 |
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| Authors: | Hu Die Zhou Xiaolin |
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| Affiliation: | Hu Die,Zhou Xiaolin(Department of Communication Science and Engineering,Fudan University,Shanghai,200433,China) |
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| Abstract: | A low-complexity channel estimation method for orthogonal frequency division multiplexing(OFDM) systems is proposed.At the receiver,the power and phases of the pilots are designed based on the minimum mean-square error(MSE) criteria and the given pilot placement.At the receiver,the estimation of the channel impulse response is obtained by directly adding the received pilots and then multiplying the sum by a weighted factor.Since only a small number of complex multiplications are needed in the estimation,the... |
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| Keywords: | orthogonal frequency division multiplexing(OFDM) channel estimation pilot design |
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