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arXiv 2110.03335eess.SP
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模采样的残差恢复算法

Residual Recovery Algorithm For Modulo Sampling

Eyar Azar, Satish Mulleti, Yonina C. Eldar

摘要:

模数转换器(ADC)的两个重要属性是其采样速率和动态范围。对于具有有限能量的带限信号,采样率应大于或等于奈奎斯特速率。还希望信号的动态范围应在ADC的动态范围内;否则,信号将被削波。最近提出了在采样之前使用模运算符来限制动态范围。由于模运算的非线性,样本失真。从其模样本恢复信号的现有恢复算法以高采样率操作,并且在存在噪声的情况下不鲁棒。在本文中,我们提出了一个强大的算法来恢复信号的模样本,在较低的采样率相比,现有的技术。我们还表明,我们的方法具有较低的误差相比,现有的方法,对于给定的采样率,噪声电平和动态范围的ADC。我们的研究结果导致更少的限制硬件设计,以解决动态范围的问题,同时以最低的速率工作。

英文摘要:

Two important attributes of analog to digital converters (ADCs) are its sampling rate and dynamic range. The sampling rate should be greater than or equal to the Nyquist rate for bandlimited signals with bounded energy. It is also desired that the signals' dynamic range should be within that of the ADC's; otherwise, the signal will be clipped. A modulo operator has been recently suggested prior to sampling to restrict the dynamic range. Due to the nonlinearity of the modulo operation, the samples are distorted. Existing recovery algorithms to recover the signal from its modulo samples operate at a high sampling rate and are not robust in the presence of noise. In this paper, we propose a robust algorithm to recover the signal from the modulo samples which operates at lower sampling rate compared to existing techniques. We also show that our method has lower error compared to existing approaches for a given sampling rate, noise level, and dynamic range of the ADC. Our results lead to less constrained hardware design to address dynamic range issues while operating at the lowest rate possible.

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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