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Academic Press Library in Signal Processing by Rama Chellappa, Sergios Theodoridis

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Chapter 17

DOA Estimation of Nonstationary Signals

Moeness G. Amin and Yimin D. Zhang,    Center for Advanced Communications, Villanova University, Villanova, PA, USA, moeness.amin@villanova.edu, yimin.zhang@villanova.edu

Abstract

In this chapter, we discuss the direction finding problem of sources emitting or inducing nonstationary signals. The focus is on signals which are uniquely characterized by their instantaneous frequencies. Recognizing the quadratic time-frequency distributions as an effective tool to localize signal power in the time-frequency domain, we present nonstationary array processing in the context of time-frequency signal representations. The spatial time-frequency distribution (STFD) framework is used to re-introduce high-resolution ...

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