【作者】 陈亚祥；

【导师】 陈明；

【作者基本信息】 东南大学 ， 通信与信息系统， 2005， 硕士

【摘要】 无线信道估计是无线通信系统的重要组成部分,高效而复杂度低的无线信道估计算法可以极大地提高无线通信系统的性能。本文在介绍无线信道估计基本原理的基础上,对OFDM和HSUPA这两种无线通信系统的信道估计问题进行了仿真研究。论文第1章介绍了无线信道的基本知识以及信道估计的重要性,第2章介绍了无线信道估计的基本原理,这两章是全文的基础。论文第3章对OFDM系统的信道估计算法进行了仿真研究,在介绍OFDM系统的基础上,分别对基于训练序列和基于导频符号的信道估计算法进行了仿真研究,对这两种信道估计的常见算法进行了仿真分析,比较了它们的优缺点,并提出了一种改进线性插值算法。论文第4章简要地介绍了HSUPA系统,并仿真了采用WMSA、简单复制、线性插值等信道估计算法的系统性能,然后比较了各种算法的优缺点。论文最后对全文进行了简要总结。更多还原

【Abstract】 Channel estimation is one of important parts in wireless communication systems. Some channel estimation algorithms with low complexity and high efficiency can improve the system performance remarkably.In this dissertation, principles of wireless channel estimation are introduced and channel estimation problems for OFDM and HSUPA systems are investigated through computer simulationMain characters of wireless channels and the importance of channel estimation are introduced in Chapter 1. In Chapter 2 basic principles of wireless channel estimation are introduced. The two chapters are the foundation of the paper.In Chapter 3 algorithms of OFDM channel estimation are investigated. After introducing the principle of OFDM system, training sequence-based and pilot-based channel estimation methods are studied respectively. Some classic algorithms of the two methods are analyzed and their advantages and disadvantages are compared. Meanwhile, a modified linear-interpolation scheme is proposed.In Chapter 4 WMSA and linear-interpolation algorithm of channel estimation in HSUPA system are investigate by simulation and their advantages and disadvantages are compared.Summary of the dissertation is presented in the end.更多还原