资 源 简 介
应用背景频率不变波束形成(Frequency-invariant
beamforming, FIB)在麦克风阵列语音信号的无失真采集和处理中具有重要的应用。经典的FIB设计方法通常是在远场平面波的模型下提出的,本文根据麦克风阵列近场球面波模型,将空间响应变化函数(spatial response variation, SRV)运用到近场线性约束方差(Linear Constrained Minimum
Variance, LCMV)宽带波束形成中,把空间响应函数作为优化条件,然后根据拉格朗日乘子法计算得到闭式解,从而得到频率不变的权向量。但是该方法受到环境干扰和噪声影响,权值分配值需要较大的浮动。因此本文采取了自适应加权频率不变波速形成,能够根据环境自适应的选择加权值的大小。仿真实例证明了所提方法的有效性和理论分析的正确性。关键技术The frequency invariant beamforming (FIB) has important applications in
the microphone array speech signal acquisition and processing. Conventional FIB
design methods are usually proposed in the far-field plane wave model, this
paper according to microphone array in the near field spherical wave model , the
response variation spatial (SRV) is applied to the formation of broadband
beamforming in the near field linear Constrained Minimum (Variance LCMV),
spatial response function as the optimal conditions, then according to the
Lagrange multiplier method computing a closed
文 件 列 表
MATALB 程序
1.MUSIC算法MATLAB程序
10.L型阵下基于2D-MUSIC的二维DOA估计算法
11.一阶前向预测的DOA估计算法MATLAB程序
12. 宽带信号DOA估计的非相干信号子空间(ISM)MATLAB程序
13.信源数估计MDL算法MATLAB程序
14.均匀线阵DOA估计Unitary -ESPRIT算法MATLAB程序
15 四元数MUSIC的MATLAB程序
16.LCMV波束形成算法MATLAB程序
17.LMS自适应波束形成MATLAB程序
18.阵列信号处理中DOA估计演示平台MATLAB程序
2.ESPRIT 算法MATLAB程序
3.root-MUSIC算法MATLAB程序
4.面阵中二维角度估计 Unitary -ESPRIT算法MATLAB程序
5.空间平滑MUSIC算法的MATLAB程序
6.角度和时延联合估计(JADE)算法MATLAB程序
7.谱峰搜索传播算子DOA估计算法MATLAB程序
8.基于增广矩阵束的L型阵列的二维DOA估计MATLAB程序
9.均匀圆阵下基于UCA-ESPRIT的二维DOA估计的MATLAB程序
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