论文标题

正弦型parseval框架

Enveloped Sinusoid Parseval Frames

论文作者

Goehle, Geoff, Cowen, Benjamin, Park, J. Daniel, Brown, Daniel C.

论文摘要

本文提出了一种从任何复杂信封中构建旁观框架的方法。由此产生的包围正弦parseval(ESP)框架可以代表其物理形态指定的多种信号类型。由于ESP框架即使是从各种信封产生的,它也会保留其parseval属性,因此它与大规模和迭代优化算法兼容。 ESP框架是通过将时移的包络功能应用于离散的傅立叶变换基础来构建的,并且以这种方式类似于短期傅立叶变换。 这项工作为合成和实验测量的信号提供了ESP框架生成的示例。此外,还展示了框架与分布式稀疏优化框架的兼容性,并提供了有效的实现细节。关于声学数据的数值实验表明,这种方法的灵活性使其可以与STFT同时竞争时间频率处理,以及Prony的时间稳定参数估​​计的方法,超越了每种单独技术的缺点。

This paper presents a method of constructing Parseval frames from any collection of complex envelopes. The resulting Enveloped Sinusoid Parseval (ESP) frames can represent a wide variety of signal types as specified by their physical morphology. Since the ESP frame retains its Parseval property even when generated from a variety of envelopes, it is compatible with large scale and iterative optimization algorithms. ESP frames are constructed by applying time-shifted enveloping functions to the discrete Fourier Transform basis, and in this way are similar to the short-time Fourier Transform. This work provides examples of ESP frame generation for both synthetic and experimentally measured signals. Furthermore, the frame's compatibility with distributed sparse optimization frameworks is demonstrated, and efficient implementation details are provided. Numerical experiments on acoustics data reveal that the flexibility of this method allows it to be simultaneously competitive with the STFT in time-frequency processing and also with Prony's Method for time-constant parameter estimation, surpassing the shortcomings of each individual technique.

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