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Sparse signal recovery for localization of coherent far- and near-field signals

机译:稀疏信号恢复,用于定位相干远离场和近场信号

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In direction finding (DF) and localization applications, coherency among the signals is an important source of error for parameter estimation. In this paper, a method is proposed to solve the DF problem where there are coherently mixed arbitrary number of far- and near-field sources. In order to estimate the direction-of-arrival (DOA) and the range parameters, compressed sensing (CS) approach is presented where a dictionary matrix is constructed with far- and near-field steering vectors. A sparse vector including the supports of the source signals is estimated in spatial domain. The supports of coherent signals are recovered by using convex minimization techniques. It is shown that the proposed approach recovers the signal components of the array output as well as determining the source locations.
机译:在方向查找(DF)和本地化应用程序中,信号之间的一致性是参数估计的重要误差来源。在本文中,提出了一种方法来解决与近场源的连贯混合的DF问题。为了估计到达方向(DOA)和范围参数,提出了压缩感测(CS)方法,其中用远方和近场转向矢量构造了字典矩阵。包括源信号的支撑的稀疏向量在空间域中估计。通过使用凸起最小化技术来恢复相干信号的支持。结果表明,所提出的方法恢复阵列输出的信号分量以及确定源位置。

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