Journal
IEEE SIGNAL PROCESSING LETTERS
Volume 28, Issue -, Pages 1210-1214Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2021.3088051
Keywords
Estimation; Direction-of-arrival estimation; Frequency estimation; Time-frequency analysis; Signal resolution; Sensors; Frequency conversion; Direction-of-arrival (DOA) estimation; Cramer-Rao bound (CRB); multiple frequencies; underdetermined
Categories
Funding
- National Natural Science Foundation of China [61801028, 61628101]
- Beijing Institute of Technology Research Fund Program for Young Scholars
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The Cramer-Rao bound for direction of arrival estimation using multiple frequency pairs provides a tighter bound than the existing dual-frequency scenario, leading to improved estimation accuracy and target resolvability.
The Cramer-Rao bound (CRB) for direction of arrival (DOA) estimation exploiting both auto-correlation and cross-correlation information within multiple frequencies of the received array signals is derived. It provides a tighter bound than the existing CRB for the dual-frequency scenario. For the multiple frequencies, it is much lower than its dual-frequency counterpart, and also exists for a greater number of sources, thereby validating that exploiting multiple frequency pairs can improve both estimation accuracy and target resolvability.
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