序言最近正在学习基于毫米波雷达的SAR成像。接触的第一个算法就是时域的BPA算法,网上虽然也有不少文章,但是我认为写的或多或少都不是很完善。经过大致的学习后,我按照自己的理解整理出相关思路,以供大家共同学…
由来:BP算法最初是McCorkle受计算机层析技术的启发推导而来,所谓的计算机层析:就是CT(Computer Tomograpy),这是在医院中再普遍不过的技术了。 BP算法的原理:BP算法参考了“时延-叠加”的思想,在雷达应用中,其对雷达接收天线接收到的回波信号进行距离向匹配率,获取回波数据中包含的相幅信息,再通过IFFT进行逆傅里叶变...
此即滤波反投影(Filtered Back Projection)公式,其中|ω|即高通滤波器。 需要注意的是F^ω−1[F^p[R(p;θ)](ω)|ω|]仍是有关p的函数,计算具体(x0,y0)处的值时需要根据x0cosθ+y0sinθ=p来确定p的取值。 直观理解:代入p取值,注意到直线xsinθ+ysinθ=x0cosθ+y0sinθ...
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Deep learning’s success owes much to the error backpropagation (BP) algorithm, yet BP is often criticized as biologically implausible due to its requirement of symmetric weight transport and separate forward vs. backward phases PAPERS.NEURIPS.CC CBMM.MIT.EDU . Feedback alignment (FA) ...
Among current BP algorithms, the fast factorized back-projection (FFBP) algorithm is one of the most essential representatives that achieve high-resolution images in an efficient manner. In this paper, the principle and applications of the FFBP algorithm are investigated through the derivation of the...
A key requirement of the filtered back projection reconstruction algorithm typically used by CT is for the set of 2-D images to represent a full 360[degrees] rotation of the object relative to the source and detector. 3-D X-Ray inspection looks into the void n In the space of four eveni...
1) backprojection algorithm 向后投射算法2) back projection algorithm 后向投影算法3) Fast back-projection algorithm 快速后向投影算法4) constant aperture back-projection(CABP) algorithm 固定孔径后向投影算法5) backward algorithm 后向算法 1. After giving the model of airforce missile firepower ...
3) constant aperture back-projection(CABP) algorithm 固定孔径后向投影算法 4) Back-projection(BP) method 后向投影法 5) back projection 后向投影 1. Theback projectionmethod of through-wall stepped frequency signal is deduced. 雷达穿墙检测是一种新颖的人体探测技术,文中构建了电磁波穿透绝缘介质墙的...
3) Fast back-projection algorithm 快速后向投影算法4) Back-projection(BP) method 后向投影法5) back projection 后向投影 1. The back projection method of through-wall stepped frequency signal is deduced. 雷达穿墙检测是一种新颖的人体探测技术,文中构建了电磁波穿透绝缘介质墙的数学模型,推导了...