An Information-Theoretic Approach to Waveform Design for Active Incoherent Microwave Imaging
An Information-Theoretic Approach to Waveform Design for Active Incoherent Microwave Imaging
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DOI：
10.1109/cama.2018.8530633
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
Stavros Vakalis;J. Nanzer
中科院分区：
文献类型：
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作者：
Stavros Vakalis;J. Nanzer
有源非相干成像是一种将空间频率采样方法与有源噪声雷达技术相结合的新型微波成像方法。在本文中，我们提出了一种通过分析传输噪声波形之间的互信息来表征图像重建保真度的方法。表征了传输噪声的不同统计分布，并研究了接收波形带宽对互信息和图像保真度的影响。我们表明，高斯噪声通常优于其他分布，并且互信息遵循图像保真度的总体趋势，这表明互信息可以成为设计主动非相干成像的发射噪声波形的有用度量。
Active incoherent imaging is a new microwave imaging method that combines spatial frequency sampling methods with active noise radar techniques. In this paper, we present a method for characterizing image reconstruction fidelity by analyzing the transmitted noise waveforms in terms of the mutual information between them. Different statistical distributions of the transmitted noise are characterized, and we investigate the effect on mutual information and image fidelity in terms of the bandwidth of the received waveforms. We show that Gaussian noise generally outperforms other distributions, and that the mutual information follows the general trend of image fidelity, indicating that mutual information can be a useful metric for designing transmit noise waveforms for active incoherent imaging.