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Robust Measurement Matrix Design Based on Compressed Sensing for DOA Estimation

机译:基于压缩检测的DOA估计鲁棒测量矩阵设计

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It has been well known that Massive multiple-input-multiple-output (MIMO) radar can provide an excellent performance in direction of arrival (DOA) estimation. However, the significant increasing data size will seriously reduce the computational efficiency in practical application. Although compressed measurement can reduce data size and computational complexities, improper compression will enhance the environment noise. In this paper, a robust measurement matrix is designed to reduce data size and environment noise. Different from the general compressed sensing (CS) schemes, the optimization function is established by considering the overall mutual coherence of dictionary and the energy of measurement matrix, which is more suitable for noisy environment. The optimization function is highly non-convex due to the rank shrinkage of measurement matrix. To solve this problem, an alternating minimization scheme based on matrix factorization and Principal Component Analysis (PCA) is proposed. Moreover, the structure of measurement matrix is designed for massive MIMO receiver. Furthermore, numerous results demonstrate this scheme has a better estimation performance than random measurement method and general CS schemes in the noisy environment.
机译:众所周知,巨大的多输入 - 多输出(MIMO)雷达可以在到达方向(DOA)估计方面提供出色的性能。然而,数据规模显着增加将严重降低实际应用中的计算效率。虽然压缩测量可以减少数据尺寸和计算复杂性,但不正当的压缩将增强环境噪声。在本文中,旨在减少数据大小和环境噪声的稳健测量矩阵。与一般压缩感测(CS)方案不同,通过考虑字典的整体相互连贯性和测量矩阵的能量来建立优化功能,这更适合嘈杂的环境。由于测量矩阵的等级收缩,优化功能是高度的非凸。为了解决这个问题,提出了一种基于矩阵分解和主成分分析(PCA)的交替最小化方案。此外,测量矩阵的结构用于大规模MIMO接收器。此外,许多结果证明了该方案具有比随机测量方法和嘈杂环境中的一般CS方案更好的估计性能。

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