Direction-of-Arrival Estimation for Nested Array Using Mixed-Resolution ADCs

• Published in: IEEE communications letters Vol. 26; no. 8; pp. 1868 - 1872
• Main Authors: Wang, Lei, Ren, Chunhui, Liu, Renting, Zheng, Zhi
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-08-2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Covariance matrices; Covariance matrix; difference coarray; Direction of arrival; Direction-of-arrival (DOA) estimation; Direction-of-arrival estimation; Estimation; Manifolds; Measurement; mixed-resolution (MR) ADCs; nested array; Quantization (signal); Sensor arrays; Signal to noise ratio
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2022.3178617

In this letter, an effective method for estimating direction-of-arrival (DOA) using the nested array via mixed-resolution (MR) quantization is developed. First, we derive the output signal model of the nested array under MR quantization, and utilize MR quantized data to construct a quantized covariance matrix. Subsequently, we recover an unquantized augmented covariance matrix by formulating a rank-minimization problem in the coarray domain. Finally, we perform DOA estimation using the recovered covariance matrix. The proposed method can achieve excellent performance close to that of the existing methods using high-resolution data. Simulation results demonstrate the validity of our approach.