DOA Estimation for Highly Correlated and Coherent Multipath Signals with Ultralow SNRs
Joint Authors
Cheng, Li
Li, Yang
Zou, Lianying
Qin, Yong
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-10-13
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
In a typical multipath propagation environment, there exists a strong direct path signal accompanying with several weak multipath signals.
Due to the strong direct path interference and other masking effects, the Direction-of-Arrival (DOA) of a weak multipath signal is hard to be estimated.
In this paper, a novel method is proposed to estimate the DOA of multipath signals with ultralow signal-to-noise ratio (SNR).
The main idea is to increase the SNR and signal-to-interference ratio (SIR) of the desired multipath signal in time-delay domain before DOA estimation processing.
Firstly, the cross-correlation functions of the direct path signal and the received array signal are calculated.
Then, they are combined and constructed to an enhanced array signal.
Under certain conditions, the SNR and SIR of the desired signal can be significantly increased.
Finally, the DOAs of multipath signals can be estimated by conventional technologies, and the associated time delays can be measured on the DOA-time-shift map.
The SNR and SIR gains of the desired signal are analyzed theoretically, and theoretical analysis also indicates that the Cramer–Rao bound can be reduced.
Simulation examples are presented to verify the advantages of the proposed method.
American Psychological Association (APA)
Cheng, Li& Li, Yang& Zou, Lianying& Qin, Yong. 2019. DOA Estimation for Highly Correlated and Coherent Multipath Signals with Ultralow SNRs. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1157313
Modern Language Association (MLA)
Cheng, Li…[et al.]. DOA Estimation for Highly Correlated and Coherent Multipath Signals with Ultralow SNRs. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1157313
American Medical Association (AMA)
Cheng, Li& Li, Yang& Zou, Lianying& Qin, Yong. DOA Estimation for Highly Correlated and Coherent Multipath Signals with Ultralow SNRs. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1157313
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157313