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arXiv 1503.05800math.FA
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基于Gabor测量的相位恢复

Phase Retrieval from Gabor Measurements

Irena Bojarovska, Axel Flinth

摘要:

压缩感知研究从线性测量中恢复稀疏信号。但是,在广泛的应用中,通常只给出线性测量的绝对值(平方)。恢复这样的信号(不一定是稀疏的)被称为相位恢复问题。我们考虑这个问题的情况下,当测量的时间频率偏移的一个适当选择的发电机,即来自一个Gabor帧。我们证明了一个容易检查的注入性条件恢复任何信号从所有$N^2$时频偏移,并恢复稀疏信号,当只有一些这些测量。

英文摘要:

Compressed sensing investigates the recovery of sparse signals from linear measurements. But often, in a wide range of applications, one is given only the absolute values (squared) of the linear measurements. Recovering such signals (not necessarily sparse) is known as the phase retrieval problem. We consider this problem in the case when the measurements are time-frequency shifts of a suitably chosen generator, i.e. coming from a Gabor frame. We prove an easily checkable injectivity condition for recovery of any signal from all $N^2$ time-frequency shifts, and for recovery of sparse signals, when only some of those measurements are given.

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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