| 基于PN序列的OFDM系统信道估计方法研究 |
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| 引用本文： | 白皓东,戚银城,张京席. 基于PN序列的OFDM系统信道估计方法研究[J]. 电脑与信息技术, 2009, 17(1): 25-27 |
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| 作者姓名： | 白皓东 戚银城 张京席 |
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| 作者单位： | 华北电力大学电子与通信工程系,河北,保定 |
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| 摘 要： | 文章介绍了OFDM系统中基于PN序列的信道估计技术，并对基于PN序列的时域迭代相关检测算法进行了改进，即在现有方法的基础上，把得到的信道冲激响应按固定的OFDM长度分块，并对每块符号进行补零、FFT，然后在时频二维平面进行三次样条插值得到每块符号中全部点的频率响应，与改进前及典型块状导频估计算法相比较，提高了估计精度。
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| 关 键 词： | OFDM 信道估计 PN序列 |
Research on PN-Based Channel Estimation Method in OFDM System |
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| BAI Hao-dong,QI Yin-cheng,ZHANG Jing-xi. Research on PN-Based Channel Estimation Method in OFDM System[J]. Computer and Information Technology, 2009, 17(1): 25-27 |
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| Authors: | BAI Hao-dong QI Yin-cheng ZHANG Jing-xi |
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| Affiliation: | (Department of Electronic and Communication Engineering, North China Electric Power University, Baoding, Hebei 071003, China) |
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| Abstract: | The channel estimation technique based on PN sequence in OFDM system is introduced, and an improved algorithm with PN-based turbo correlation detection in time domain is proposed in this paper. The channel state information is departed into blocks according to fixed OFDM length. For each block, zeros are added and FFT operation is performed. Instead of using Lagrange interpolation method in frequency domain, cubic spline interpolation method in time-frequency 2D surface is employed and estimation precision is improved. |
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| Keywords: | OFDM |
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