基和感知矩阵是影响压缩感知的关键参数

Vivek Upadhyaya, M. Salim
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引用次数: 2

摘要

压缩感知(CS)是一种利用极微小的观测值对压缩信号进行压缩和重构的新方法。这些微小的观察也被称为测量的次数。CS的基本优点是正确重建压缩信号所需的测量次数比传统方法少得多。如果我们回顾一下文献,我们就会发现Shannon给出了一个理论,用来对信号进行适当的重构。该理论指出,采样频率必须高于该信号中最高频率分量的两倍。因此,传统方法的局限性在于需要大量的存储空间和大的带宽来传输数据。因此,研究人员提出了一种新的想法,称为压缩感知。影响压缩感知的关键参数是基和感知矩阵。这种方法背后的基本事实是用于压缩和重构的信号必须是稀疏的。在本文所做的分析中,这两个矩阵的变化直接改变了压缩感知压缩重建后得到的信噪比值。该工作基于三种音乐信号,采用不同的基矩阵和传感矩阵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Basis & Sensing Matrix as key effecting Parameters for Compressive Sensing
Compressive Sensing (CS) is a new approach for compression and reconstruction of compressed signals using very minute observations. These minute observations are also called the number of measurement. The basic benefits of CS are that the number of measurements which are required for proper reconstruction of the compressed signal is very less than the conventional method. If we go through the literature then, we get that for proper reconstruction of signal a theory is given by Shannon. This theory states that the sampling frequency must be higher than twice the highest frequency component in that signal. So the limitation of the conventional method is that it requires so much storage to store and a large bandwidth to transmit the data. So researchers came with a new idea which is termed as Compressive Sensing. Key effecting parameters which are very crucial for the compressive sensing is the Basis and Sensing matrix. The basic fact behind this approach is that the signal which is used for the compression and reconstruction must be Sparse. In the analysis which is done by us in this paper is that the change in these two matrices directly changes the value of SNR which will be obtained after compression and reconstruction using the compressive sensing. The work which is carried out based on three kinds of music signals with different cases of Basis and Sensing matrices.
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