| 基于可变抽头长度的IEEE 802.11n信道估计方法 |
| |
| 引用本文： | 刘云峰,陈淑敏,王洋,彭曦,徐元欣. 基于可变抽头长度的IEEE 802.11n信道估计方法[J]. 浙江大学学报(工学版), 2010, 44(4): 681-686. DOI: 10.3785/j.issn.1008-973X.2010.04.010 |
| |
| 作者姓名： | 刘云峰 陈淑敏 王洋 彭曦 徐元欣 |
| |
| 作者单位： | 浙江大学信息与通信工程研究所;浙江理工大学信息电子学院; |
| |
| 摘 要： | 为了提高在不同信道冲激响应长度下无线局域网传输性能,提出一类基于可变抽头长度的MIMO OFDM信道估计方法.该类方法利用训练序列对信道进行估计,动态调整抽头长度及位置,基于最小二乘原理完成一个较大点数的信道估计,估计噪声功率并确定噪声门限.根据IEEE 802.11n无线局域网信道模型中多群集效应,使用消去策略确定需要的抽头长度,在满足门限后对系统进行抽头长度更新后的最小二乘估计.分析及仿真结果表明,该类方法与传统MIMO OFDM信道估计方法相比,节省了系统资源,估计性能有显著提高,尤其适用于较高信噪比及较大星座图调制的MIMO OFDM系统.
|
| 关 键 词： | MIMO OFDM 信道估计 抽头长度 最小二乘 |
Channel estimation methods for IEEE 802.11n based on variable tap length |
| |
| LIU Yun-feng,CHEN Shu-min,WANG Yang,PENG Xi,XU Yuan-xin. Channel estimation methods for IEEE 802.11n based on variable tap length[J]. Journal of Zhejiang University(Engineering Science), 2010, 44(4): 681-686. DOI: 10.3785/j.issn.1008-973X.2010.04.010 |
| |
| Authors: | LIU Yun-feng CHEN Shu-min WANG Yang PENG Xi XU Yuan-xin |
| |
| Affiliation: | LIU Yun-feng1,CHEN Shu-min2,WANG Yang1,PENG Xi1,XU Yuan-xin1(1.Institute of Information , Communication Engineering,Zhejiang University,Hangzhou 310027,China,2.Faculty of Informatics , Electronics,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
| |
| Abstract: | A method of MIMO-OFDM channel estimation based on variable channel impulse response length was presented to improve the WLAN transmission performance for different channel environment.A least squares channel estimation method was investigated with training sequences by adjusting dynamically the tap length and position.Channel estimation with large points was implemented by using the least squares principle to estimate the noise power and determine the noise threshold.Roll-off strategy was applied for the ta... |
| |
| Keywords: | MIMO-OFDM channel estimation tap length least squares |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《浙江大学学报(工学版)》浏览原始摘要信息 |
|
点击此处可从《浙江大学学报(工学版)》下载全文 |
|
