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Toeplitz-pretreatment-algorithm
- 在DOA估计中,实际测量和理论肯定存在误差,比如通道误差,阵元位置误差,我们提出一种toplitz的预校正方法。-In the DOA estimate, the actual measurement and theory certainly exist errors, such as channel error, array (position errors, we put forward a kind of toplitz or calibration methods.
ESPRIT1
- 利用ESPRIT方法求目标的角度,系统为均匀线阵,阵元间距为波长的一半-Estimate the DOA of the target
start
- 用七元线形天线阵(ULA) 已知:信号中心波长为2,天线阵元的间距为1米,快拍数为2000,空中有四个 源信号,假设它们的频率:0.015, 0.05, 0.02, 0.035 四个源信号的方向分别为:pi/4 pi/3 pi/6 3pi/4 求: 1)在不加入噪声的情况下,画出传统波束形成法、Bartlett波束 形成法、Capon波束形成法的空间谱图; 2)在加入高斯白噪声的情况下,假设信噪比为10dB,画出传统波束 形成法、Bartlett波束形成法、Ca
Mls_esprit
- esprit的ls算法matlab仿真,信噪比为0,生成随阵元数变化而产生均方差的变化图像。-The esprit ls algorithm Matlab simulation, and signal to noise ratio is 0, generated to produce the image of the mean square deviation of the change with changes in the number of array elements.
circle
- 八阵元均匀圆阵,MUSIC算法实现空间谱测向-eight DOA MUSIC
2D-MUSIC-algorithm
- 二维MUSIC算法的Matlab程序(8阵元均匀圆阵,三维图;方位角、俯仰角)-2D MUSIC algorithm
boshuxingcheng
- 换能器阵元的不同排列组合决定其指向性,波束形成是多波束测量的关键技术。文中 通过数学计算总结了不同换能器阵进行波束形成的工作原理,并介绍了利用二维DFT进行频 域波束形成的一般方法。最后结合现役多波束测深系统,简单解释说明不同系统所采用的波束 形成技术。-Transducer using an array of different permutations and combinations to determine its directivity, beam formation is
diagonal_loading_SMI_1
- 针对样本协方差矩阵求逆方法中采样点小于阵元个数时作出的仿真。此改进方法可以在采样点小于阵元个数时提高波束形成器的性能。-For the sample covariance matrix inversion method of sampling is less than the number of array elements made the simulation. This improved method can be sampled at less than the number of ar
circular_test
- 针对十六阵元的圆阵用matlab仿真出的方位波束图。-Array element for the sixteen matlab simulation using a circular array of directional beam pattern.
multiple_DOA_estimate
- 采用10阵元的阵元间距为1/2波长的均匀线阵,估计2个不相干的信号源的波打方向。其中样本数为100,S/N分别为10dB,20dB。信号源来自-10°和40°。程序里面包含用MUSIC,RootMUSIC,ESPRIT,MVDR,F-SAPES算法实现的DOA估计-A 10-element array element spacing of 1/2 wavelength of the uniform linear array, it is estimated that two unrelated
combined-efficiency
- 仿真了在高斯信道条件下,阵元发射正弦信号功率合成效率,对阵元数量不同的合成效率进行了比较-Simulation of the array element the Gaussian channel conditions, transmitter the sine signal power synthesis efficiency against yuan number of different synthetic efficiency compared
combined-efficient
- 仿真了不同频率的调制信号在天线阵元(阵元数是10)发射时的合成效率,并进行了效率对比。-Simulation of the contrast of the modulated signals of different frequencies in the antenna array element (array element number 10) emitted when the synthesis efficiency, and the efficiency.
beamforming
- 固定阵列孔径,随机阵元间隔MVDR,OPT,LMS方法波束形成-Fixed array aperture, random array element interval MVDR, OPT, LMS beamforming
orthogonal-beam-formation
- 传统的相控阵雷达,发射信号完全相关,通过对每个阵元加不同相移就可以改变波束的发射方向。以这种方式形成的波束通常主瓣较窄,信噪比比较高,若用于跟踪方向先验已知目标或只对空间某一窄的领域进行搜索时非常有利。本代码可以实现正交波束的形成.-Can realize orthogonal beam formation.
The-array-pattern
- 阵列方向图matlab描述,并讨论阵元数,来波方向以及信噪比对阵列方向图的影响-The array pattern matlab describe and discuss a number of array elements to wave direction and the signal-to-noise ratio of the array pattern.
SMUSIC
- 单次快拍 MUSIC 算法,这种单次快拍 MUSIC 算法仅利用接收的一次快拍的 M(M 为阵元数)个数据,通过对这 M 个数据做统计处理,来估计阵列数据的协方差矩阵-Single snapshot MUSIC algorithm, this single snapshot the MUSIC algorithm only receiving a snapshot M (M array element number) data, statistical treatment of these M
1.MUSIC--MATLAB
- 基于天线阵列协方差矩阵的特征分解类DOA估计算法中,MUSIC算法具有普遍的适用性,只要已知天线阵的布阵形式,无论是直线阵还是圆阵,不管阵元是否等间隔分布,都可以得到高分辨的估计结果。-DOA estimation algorithm, MUSIC algorithm has universal applicability of decomposition classes based on the characteristics of the antenna array covariance m
Array-yuan-changes-in-the-number
- 等间距线性阵列,阵元间距d= λ /2,等幅加权,目标方位φr = 0°,无噪声。 分别仿真计算阵元数M=8 、16时的阵列方向图,定性分析产生的原因。(可通过3dB波束宽度计算公式说明) -Equally spaced linear array, the array element spacing d = λ/2, equal amplitude weighted target azimuth φr = 0, no noise. , Respectively, the number o
Changes-in-the-signal-to-noise-ratio
- 等间距线性阵列,阵元数M=8,阵元间距d= λ /2,等幅加权,目标方位φr =0°。产生空间白噪声矢量(复高斯分布)。 设阵列信号矢量元素s(m)=exp[j mψr],其信号幅度为1,该阵元接收机附加的高斯噪声为n(m)=nmr+jnmi,其中实虚部均为独立同分布N(0, σ2)的高斯随机数,则该通道合成信号x(m)=s(m) + n(m),其中信噪比为: SNR = 10 lg[1/(2σ2)] = – 3 – 10 lg(σ2) (dB) -The spacing of t
The-influence-of-weight-coefficient
- 等间距线性阵列,阵元数M=8,阵元间距d= λ /2,目标方位φr =0°,无噪 分别仿真计算等幅加权、汉宁窗加权、切比雪夫加权时的阵列方向图,定性分析产生的原因。(可分析不同窗函数引起的主瓣、旁瓣影响) -Equally spaced linear array, the number of array elements M = element spacing d = λ/2, target azimuth φr = 0, no noise respectively simula