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Compressive Sensing Applied to MIMO Radar and Sparse Disjoint Scenes.

机译:压缩传感应用于MIMO雷达和稀疏不相交场景。

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摘要

The purpose of remote sensing is to acquire information about an object through the propagation of electromagnetic waves, specifically radio waves for radar systems. However, these systems are constrained by the costly Nyquist sampling rate required to guarantee efficient recovery of the signal. The recent advancements of compressive sensing offer a means of efficiently recovering such signals with fewer measurements. This thesis investigates the feasibility of employing techniques from compressive sensing in on-grid MIMO radar in order to identify targets and estimate their locations and velocities. We develop a mathematical framework to model this problem then devise numerical simulations to assess how various parameters, such as the choice of recovery algorithm, antenna positioning, signal to noise ratio, etc., impact performance. The experimental formulation of this project leads to further theoretical questions concerning the benefits of incorporating an underlying signal structure within the compressive sensing framework. We pursue these concerns for the case of sparse and disjoint vectors. Our computational and analytical treatments illustrate that knowledge of the simultaneity of these structures within a signal provides no benefit in reducing the minimal number of measurements needed to robustly recover such vectors from noninflating measurements, regardless of the reconstruction algorithm.
机译:遥感的目的是通过电磁波,特别是雷达系统的无线电波的传播,获取有关物体的信息。但是,这些系统受到保证信号有效恢复所需的昂贵的奈奎斯特采样率的限制。压缩感测的最新进展提供了一种以较少的测量来有效恢复此类信号的方法。本文研究了在网格MIMO雷达中采用压缩感知技术来识别目标并估计其位置和速度的可行性。我们开发了一个数学框架来对这个问题进行建模,然后设计数值模拟来评估各种参数(例如恢复算法的选择,天线定位,信噪比等)如何影响性能。该项目的实验公式导致了进一步的理论问题,涉及在压缩感测框架内合并基础信号结构的好处。对于稀疏和不相交向量,我们追求这些关注点。我们的计算和分析处理表明,信号中这些结构的同时性知识无助于减少从非膨胀测量中稳健地恢复此类矢量所需的最小测量数量,而无需考虑重建算法。

著录项

  • 作者

    Minner, Michael Francis.;

  • 作者单位

    Drexel University.;

  • 授予单位 Drexel University.;
  • 学科 Mathematics.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 128 p.
  • 总页数 128
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:46:51

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