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On the Performance of One-Bit DoA Estimation via Sparse Linear Arrays
Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg, Luxembourg. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2021 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 69, p. 6165-6182Article in journal (Refereed) Published
Abstract [en]

Direction of Arrival (DoA) estimation using Sparse Linear Arrays (SLAs) has recently gained considerable attention in array processing thanks to their capability to provide enhanced degrees of freedom in resolving uncorrelated source signals. Additionally, deployment of one-bit Analog-to-Digital Converters (ADCs) has emerged as an important topic in array processing, as it offers both a low-cost and a low-complexity implementation. In this paper, we study the problem of DoA estimation from one-bit measurements received by an SLA. Specifically, we first investigate the identifiability conditions for the DoA estimation problem from one-bit SLA data and establish an equivalency with the case when DoAs are estimated from infinite-bit unquantized measurements. Towards determining the performance limits of DoA estimation from one-bit quantized data, we derive a pessimistic approximation of the corresponding Cramér-Rao Bound (CRB). This pessimistic CRB is then used as a benchmark for assessing the performance of one-bit DoA estimators. We also propose a new algorithm for estimating DoAs from one-bit quantized data. We investigate the analytical performance of the proposed method through deriving a closed-form expression for the covariance matrix of the asymptotic distribution of the DoA estimation errors and show that it outperforms the existing algorithms in the literature. Numerical simulations are provided to validate the analytical derivations and corroborate the resulting performance improvement. 

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2021. Vol. 69, p. 6165-6182
Keywords [en]
Cramér-Rao bound (CRB), direction of arrival (DoA) estimation, one-bit quantization, performance analysis, Sparse linear arrays
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-312612DOI: 10.1109/TSP.2021.3122290ISI: 000719561100007Scopus ID: 2-s2.0-85118572337OAI: oai:DiVA.org:kth-312612DiVA, id: diva2:1660747
Note

QC 20220525

Available from: 2022-05-24 Created: 2022-05-24 Last updated: 2024-03-15Bibliographically approved

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Ottersten, Björn

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