A lowpass sampling and reconstruction method for aperiodic non-bandlimited impulse signals is proposed. The impulse signals are passed through a lowpass filter and sampled at the rate of innovation.
提出了非带限冲激信号的一种低通采样和重建方法,将冲激信号通过低通滤波器后,按照信号新息率进行采样,然后对采样得到的离散时间信号进行傅里叶变换,采用最小二乘零化滤波算法可以准确地重建原始冲激信号。
参考来源 - 非带限冲激信号的一种低通采样和重建方法·2,447,543篇论文数据，部分数据来源于NoteExpress
雷达成像需要获得目标空间谱域一定范围和密度的采样以重建目标图像，目标空间谱域的填充方式与雷达成像的质量有直接关系。
Radar imaging must obtain an extent of target spatial spectral-domain sampling, and the filling of spatial spectral domain is in direct connection with the quality of imaging result.
在精确重建滤波过程中，需要计算投影数据的雷当变换，本文采用普通累加法和辛普森直线积分法来完成对象素网格的采样。
The Radon transform of the projection is calculated in the filtered process of exact reconstruction, Siddon and Simpson integral are used to sample the pixels to get the projection.
通过增加点云的采样密度，提高重建模型的精度和可靠性。
The high precision and reliability of the reconstruction model are reached by increasing sample density of measuring point cloud.
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