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TheResearchofSpatialSpectrumEstimationAlgorithminS
智能天线技术是第三代移动通信系统的关键技术之一,也是国内外热门的研究课题。由于无线移动通信的信道传输环境具有复杂性和不确定性,存在多径衰落和时延扩展,因此造成了符号间串扰、同信道干扰、多址干扰等,这些干扰降低了链路性能和系统容量,智能天线技术是解决以上问题的方法之一。 本文首先阐述了智能天线和白适应波束形成的基本理论,然后对自适应算法进行了研究。对一些基本的自适应算法最小均方算法、恒模算法及递推最小均方算法进行了分析讨论,用计算机仿真的结果论证了算法的性能。针对相干干扰介绍了空间平滑技术,对传统的相干干扰抑制方法-空间平滑法进行了分析,采用改进算法有效降低了空间平滑算法的运算量。对信号波达方向(DOA)的估计是智能天线研究的另一关键问题。第四章在介绍了阵列信号处理方法的基础上,先简单介绍了Bartlett、Capon、MUSIC等空间谱估计算法,分析了信源数目过估计与欠估计情况下的MUSIC算法性能,提出一种改进算法,在信源数目有误差的情况下该算法的性能良好。第五章针对多径干扰环境,在分析MMUSIC算法的基础上,本文提出了基于低秩矩阵逼近法的改进MUSIC算法(In this paper, firstly, the author illustrates the principles of smart antenna and adaptive beam forming, and then introduces some typical adaptive algorithms, the LMS ,CMA and RLS algorithms are analyzed and discussed and simulate them in the computer to prove their capability. but they have the disadvantage of high complexity, so they are not fit for practice. The paper analyses the conventional method rejecting spatial smoothing coherent interfering signals, which is spatial smoothing technique)
- 2009-07-02 22:43:06下载
- 积分:1
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MatrixCalculator
实现线性代数的矩阵运算的C++程序,矩阵计算器。(Linear algebra matrix operations C++ procedures matrix calculator.)
- 2013-01-26 15:33:54下载
- 积分:1
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Ba3
基于最小冲突法的八皇后问题实现,基于MFC的对话框程序。(Based on a minimum of eight queens problem of conflicts of law implementation, based on MFC dialog procedures.)
- 2014-03-09 18:06:09下载
- 积分:1
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lvboqi
我上机实验时在matlab环境上编写的一个关于滤波器的程序文件。(This is a file about filter builded in matlab.)
- 2013-01-10 11:31:41下载
- 积分:1
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calculator
用mfc实现计算器的基本操作,支持键盘输入,并保留xp风格,可计算平方,幂,时间显示等操作(With mfc achieve the basic operation of the calculator, support for keyboard input, and retain xp style, calculates the square, power, time display and other operations)
- 2013-10-23 15:22:24下载
- 积分:1
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auto_ptz.tar
PTZ控制源码,可以实现对云台相机的基本控制(PTZ control The basic control of cloud camera can be realized)
- 2017-11-30 10:53:43下载
- 积分:1
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Touch
四线电阻触摸屏+ADS7843
包括液晶的和触摸屏的程序
液晶屏的控制器是LC7981,兼容HD61830(Four-wire resistive touch screen+ ADS7843
Procedures including LCD and touch screen
LCD controller LC7981 compatible with HD61830
)
- 2012-04-07 04:33:22下载
- 积分:1
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wireless
用于无线网络编程的学习,很实用,作为初学者的入门教材还是很有用的。(Wireless network programming for learning)
- 2013-12-02 17:25:50下载
- 积分:1
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suanfa
自己编写的floyd 最短距离求解程序。实用简单。gcc
(Floyd shortest distance to write your own solver. Practical and simple. gcc)
- 2012-09-02 14:59:02下载
- 积分:1
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windowsPcygwinPns-2.30
windows+cygwin+ns-2.30安装全记录.doc(windows+cygwin+ns-2.30 installed full record. doc)
- 2012-10-15 06:58:56下载
- 积分:1