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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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Matlaboptimization
数值优化的各种算法,包括牛顿法,拟牛顿,遗传算法,等等。(Numerical optimization algorithms, including Newton' s method, quasi Newton, genetic algorithms, and so on.)
- 2010-05-28 13:05:51下载
- 积分:1
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chazhiyunihe
matlab经典算法的程序之插值与拟合,多项式的插值与拟合等程序(classical algorithm matlab interpolation and fitting procedures, such as polynomial interpolation and fitting procedures)
- 2011-07-09 11:21:28下载
- 积分:1
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baoluo
希尔伯特包络谱,程序简单易懂,适合初学的人学习(Hilbert envelope spectrum, straightforward procedures, suitable for beginners to learn)
- 2012-11-26 11:20:07下载
- 积分:1
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PKMgongzuokongjian
并联机构工作空间图形可视化,matlab编制的代码,请交流(Parallel Workspace graphical visualization, matlab code is compiled, please exchange)
- 2015-05-08 11:52:06下载
- 积分:1
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FORWARD_SMOOTHNESS_MUSIC
波达方向估计算法仿真中的基于解相干的MUSIC源程序,前向空间平滑MUSIC源程序。属于music算法的一种(Simulation of DOA estimation of MUSIC based coherent source solutions, the first source to the spatial smoothing MUSIC. Algorithm is a kind of music)
- 2011-05-30 23:32:09下载
- 积分:1
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fig1_12
雷达SNR相对于检测距离的曲线,其中对应不同的雷达截面积和发射功率。(Radar SNR curve with respect to the sensing distance, which corresponds to the type of radar cross section and transmit power.)
- 2013-10-21 09:45:15下载
- 积分:1
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HDB3
通过matlab仿真验证HDB3码的原理,分析HDB3码的优缺点.
(HDB3 code by matlab simulation principle, analyze the advantages and disadvantages HDB3 code.)
- 2013-12-10 00:27:48下载
- 积分:1
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matlab_txt_dat
基于matlab,可以将数据输出为txt或者为dat格式的程序(Based on matlab, data can be output as a txt or dat format for the program)
- 2013-11-24 12:03:58下载
- 积分:1
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2_esprit_chenggonglv
doa估计,即波达方向估计中的esprint算法,经过验证可以成功运行(doa estimation, estimation of DOA esprint algorithm can be run successfully, proven)
- 2013-05-04 09:38:35下载
- 积分:1