@inproceedings{4cf34b70afed4909b0f7262077df72f0,
title = "Underdetermined DOA estimation of wideband non-stationary signals with completely overlapped TFDs",
abstract = "An underdetermined direction-of-arrival (DOA) estimation method is proposed for wideband non-stationary signals with completely overlapped time-frequency distributions (TFDs). In this case, signals cannot be separated based solely on their time-frequency characteristics because of a rank-deficient spatial time-frequency distribution (STFD) matrix. The proposed method uses a moving array to recover the rank of the STFD matrix. Meantime, it vectorizes the matrix to construct a differential virtual co-array, and employs matrix rank minimization to fill the holes of virtual array, thereby enhancing the array processing degree of freedom. This method enables underdetermined DOA estimation of wideband non-stationary signals with completely overlapped TFDs, without suffering from aperture loss or requiring arrays with spatial translation invariant structures. Simulation results demonstrate the effectiveness of the proposed method.",
keywords = "matrix rank minimization, moving sparse array, underdetermined DOA estimation, wideband non-stationary signals",
author = "Jiahui Bing and Yougen Xu and Yi Liang",
note = "Publisher Copyright: {\textcopyright} 2025 SPIE.; 5th International Conference on Signal Processing and Computer Science, SPCS 2024 ; Conference date: 23-08-2024 Through 25-08-2024",
year = "2025",
doi = "10.1117/12.3054387",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Haiquan Zhao and Lei Chen",
booktitle = "Fifth International Conference on Signal Processing and Computer Science, SPCS 2024",
address = "United States",
}