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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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tmsgb
THIS IS SINGLE MACHINE INFINITE BUS SYSTEM
- 2015-01-01 21:23:25下载
- 积分:1
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runica
说明: 这是一种新的ICA算法,可以解决实际中的问题(This is a new ICA algorithm can solve practical problems in)
- 2010-04-21 20:56:33下载
- 积分:1
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yanchi
说明: matlab微分方程中的延迟问题处理代码(matlab differential delays in the processing code)
- 2009-07-29 11:54:42下载
- 积分:1
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DSP_3_17_1
产生随机信号观测样本,不同信噪比和归一化频率。利用基于FFT的自相关函数快速计算方法估计其自相关函数。(Generate random signal observation samples, different signal to noise ratio and normalized frequency.Based on FFT calculation method of the autocorrelation function to quickly estimate the autocorrelation function.)
- 2015-04-10 17:03:22下载
- 积分:1
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Motor_control_simulink
Electric drives simulink
- 2010-08-17 10:39:54下载
- 积分:1
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new1
active shunt filter open loop
- 2012-08-25 08:15:12下载
- 积分:1
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matlab--some-nice-programs
Matlab画平滑曲线的两种方法( 拟合或插值后再用plot即可)
自然状态下,用plot画的是折线,而不是平滑曲线。有两种方法可以画平滑曲线,第一种是拟合的方法,第二种是用spcrv,其实原理应该都一样就是插值。下面是源程序。(You can then use the plot)
Natural state, with the plot is a line drawing, instead of a smooth curve. There are two ways to draw a smooth curve, the first one is the fitting method, and the second is to use spcrv, in fact, the same principle should be that the interpolation. Here is the source.)
- 2015-03-23 16:35:58下载
- 积分:1
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Calculation-of-special-functions
21种特殊函数的数值计算的matlab代码,包括bessel函数,gamma函数,beta函数等(21 kinds of special functions matlab numerical code, including bessel function, gamma function, beta function, etc.)
- 2014-02-08 11:27:25下载
- 积分:1
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jm96a
中国大学生数学建模竞赛之捕鱼策略问题matlab模型(China Undergraduate Mathematical Contest in Modeling of the fishing tactics matlab model)
- 2009-11-19 21:37:19下载
- 积分:1