阵处理与波束形成学习心得（二）

最新推荐文章于 2024-05-20 20:57:37 发布

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最新推荐文章于 2024-05-20 20:57:37 发布 · 2.3k 阅读

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#波束形成 #MATLAB #统计与自适应信号处理 #阵处理

本文介绍了传感器阵列在空间采样中的作用，强调了采样频率防止空间模糊的重要性。讨论了均匀线阵（ULA）的空间采样频率定义和空间采样定理，阐述了波束形成的概念，包括空间匹配滤波器，并提供了一个MATLAB代码示例展示波束形成的过程。

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第二节：传感器阵列：空间采样

此部分的原理描述采用引用一段原文

In general, we can think of a sensor array as a mechanism for spatially sampling wavefronts propagating at a certain operating (carrier) frequency. Since in most instances the user either controls or has knowledge of the operating frequency, the sensor array provides a reliable means of interrogating the incoming wavefront for information. Similar to temporal sampling, the sensor array provides discrete (spatially sampled) data that can be used without loss of information, provided certain conditions are met. Namely, the sampling frequency must be high enough so as not to create spatial ambiguities or, in other words, to avoid spatial aliasing. The advantages of discrete-time processing and digital filtering have been well documented (Oppenheim and Schafer 1989; Proakis and Manolakis 1996). In the case of the spatial processing of signals, spatial sampling using an array provides the capability to change