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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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Matlab
包含了matlab编程基本教程及多个编程实验内容(Contains the experimental content of the basic matlab programming tutorial and multiple programming
)
- 2012-04-13 11:32:44下载
- 积分：1
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matlab_learning
里面包含五个有关matlab的学习的资料，特别适合初学者使用。(a very good learning material of matlab learning.)
- 2012-04-23 09:05:16下载
- 积分：1
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main0301
灰色预测公司的利润，利用数学建模灰色预测模型，(Gray forecasting company profits, the use of gray prediction model)
- 2012-04-29 00:06:59下载
- 积分：1
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Loop-coil-simulation
用于计算一个环形线圈周围的磁场分布， 可仿真不同频率( U7528 u4E8 u8BA1 u7B97 u4E00 u4E00 u4E0 u7EF u5F32 u7EBF u5708 u5468 u56F4 u7684 u78C1 u573A u5206 u5E03 uFF0C u53EF u4EFF u771F u4E0D u540C u9891 u7387)
- 2020-11-05 15:59:51下载
- 积分：1
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segma-delta
segma-delta modulation tech. for sinusoidal using matlab,first run simulink then run the m-file(segma)
- 2010-07-13 16:14:07下载
- 积分：1
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SEB10-programme
The PV array has been simulated at one year period and other code sources are
been discussed. In order to extract the voltage deviation from the array, we intent to
apply the formula of the MPP to these codes. Our approach, considering the hole
system, has not been totally implemented in Simulink. The grid utility and the control
- 2010-07-19 19:31:52下载
- 积分：1
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DTC-of-PMSM
永磁同步电机的直接转矩控制，自己搭建的仿真模型，基于Simulink仿真系统。(Direct torque control of permanent magnet synchronous motor, build their own simulation model, based on Simulink simulation system.)
- 2013-04-07 10:06:28下载
- 积分：1
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fenshujiexiyinzi
分数阶吸引子，一定会帮助你仿真出必要的吸引子的，哈哈哈(bifraca chaos)
- 2013-04-11 18:22:55下载
- 积分：1
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Matlab6.5
matlab强大软件，功能齐全，数学建模专业软件(matlab powerful software, functions, mathematical modeling software)
- 2009-02-07 12:16:39下载
- 积分：1
