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Updated: May 8, 2026

Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
Published on: September 3, 2021
Covariance-based direction-of-arrival estimation of wideband coherent chirp signals via sparse representation
Zhichao Sha1, Zhengmeng Liu, Zhitao Huang
1College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China. shazhichao_163@163.com
Abstract:
This paper addresses the problem of direction-of-arrival (DOA) estimation of multiple wideband coherent chirp signals, and a new method is proposed. The new method is based on signal component analysis of the array output covariance, instead of the complicated time-frequency analysis used in previous literatures, and thus is more compact and effectively avoids possible signal energy loss during the hyper-processes. Moreover, the a priori information of signal number is no longer a necessity for DOA estimation in the new method. Simulation results demonstrate the performance superiority of the new method over previous ones.
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