期刊
IEEE SIGNAL PROCESSING LETTERS
卷 29, 期 -, 页码 2612-2616出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2022.3230365
关键词
Array signal processing; direction of arrival (DOA) estimation; wideband sources; difference frequency
资金
- Office of Naval Research [N00014-21-1-2267]
- National Research Foundation of Korea [2021R1A2C1005962]
- National Research Foundation of Korea [2021R1A2C1005962] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This article presents a method for estimating the direction-of-arrivals of plane waves in a high-frequency region without spatial aliasing using multi-frequency processing. The method utilizes the difference frequency between two high frequencies to process the data effectively. It introduces a MUSIC-based method to handle multiple difference frequencies and snapshots.
The direction-of-arrivals (DOAs) of plane waves in a high-frequency region are estimated without spatial aliasing using multi-frequency processing. The method exploits the difference frequency (DF), the difference between two high frequencies. This enables processing data in a feasible region without spatial aliasing. We analyze DOA characteristics upon DF processing and propose a MUSIC-based method dealing with multi-DF and multi-snapshot. Multiple DFs having the same frequency difference allow processing multi-DF equivalently to multi-snapshot. We propose a method that considers all DFs and snapshots jointly and a joint DF method providing a single snapshot DF-MUSIC that does not require stationary DOAs. Numerical examples validate the effectiveness of the proposed method and its DOA performance is discussed.
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