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Signals Reconstruction in Heterogeneous Sensor Network with Distributed Compressive Sensing

机译:分布式压缩感知的异构传感器网络信号重构

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In this paper, we reconstruct signals in heterogeneous sensor network (HSN) with distributed compressive sensing (DCS). Combining different types of measurement matrices and different numbers of measurements, we investigate three different scenarios in which HSN is used to acquiring signals for the first time. In the first scenario, there are two different types of measurement matrices. One is Gaussian measurement and the other is Fourier measurement, and each sensor applies the same numbers of measurements. In the second scenario, all sensors use the same type of measurement matrices but the number of measurements are different from each other. The third scenario combines different types of measurement matrix and distinct numbers of measurements. Our simulation results show that in Scenario I, when the common sparsity is considerable, the DCS scheme can reduce the number of measurements. In Scenario Ⅱ, the reconstruction situation becomes better with the increase of the number of measurements. In both Scenario Ⅰ and Ⅲ, joint decoding that use different types of measurement matrices performs better than that of all-Gaussian measurement matrices, but it performs worse than that of all-Fourier measurement matrices. Therefore, DSC is a good compromise between reconstruction percentage and the number of measurements in HSN.
机译:在本文中,我们使用分布式压缩感知(DCS)在异构传感器网络(HSN)中重建信号。结合不同类型的测量矩阵和不同数量的测量,我们研究了三种不同的情况,其中使用HSN首次获取信号。在第一种情况下,存在两种不同类型的测量矩阵。一种是高斯测量,另一种是傅立叶测量,每个传感器进行相同数量的测量。在第二种情况下,所有传感器都使用相同类型的测量矩阵,但测量次数互不相同。第三种情况结合了不同类型的测量矩阵和不同数量的测量。我们的仿真结果表明,在方案I中,当公共稀疏度相当大时,DCS方案可以减少测量次数。在方案Ⅱ中,随着测量次数的增加,重建情况变得更好。在方案Ⅰ和方案Ⅲ中,使用不同类型的测量矩阵的联合解码的性能要比全高斯测量矩阵的性能好,但要比全傅里叶测量矩阵的性能差。因此,DSC是重建百分比与HSN中的测量次数之间的良好折衷。

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