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arXiv 1204.0803cs.ITmath.IT
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自适应系统辨识中的压缩感知去噪方法

Compressed Sensing for Denoising in Adaptive System Identification

Seyed Hossein Hosseini, Mahrokh G. Shayesteh

摘要:

提出了一种基于压缩感知理论的稀疏系统自适应辨识新方法。我们操纵发送的导频(输入信号)和接收信号,使得自适应滤波器的权重接近稀疏系统的压缩版本,而不是原始系统。为此,我们在发射端使用随机滤波器结构,根据CS框架形成测量矩阵。原始稀疏系统可以通过传统的恢复算法重建。因此,CS的去噪特性可以部署在所提出的方法在恢复阶段。实验结果表明,该方法的性能显着改善相比,传统的LMS方法,直接识别稀疏系统。此外,在低水平的稀疏性,我们的方法优于一个专门的识别算法,促进稀疏性。

英文摘要:

We propose a new technique for adaptive identification of sparse systems based on the compressed sensing (CS) theory. We manipulate the transmitted pilot (input signal) and the received signal such that the weights of adaptive filter approach the compressed version of the sparse system instead of the original system. To this end, we use random filter structure at the transmitter to form the measurement matrix according to the CS framework. The original sparse system can be reconstructed by the conventional recovery algorithms. As a result, the denoising property of CS can be deployed in the proposed method at the recovery stage. The experiments indicate significant performance improvement of proposed method compared to the conventional LMS method which directly identifies the sparse system. Furthermore, at low levels of sparsity, our method outperforms a specialized identification algorithm that promotes sparsity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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