High resolution direction of arrival estimation methods applied to measurements from a digital array antenna

2002 ◽  
Author(s):  
S. Bjorklund ◽  
A. Heydarkhan
Keyword(s):  
High Resolution ◽  
Direction Of Arrival ◽  
Array Antenna ◽  
Estimation Methods ◽  
Direction Of Arrival Estimation

Effect of Plasma Sheath Covering Spacecraft-Borne Array Antenna on Direction-of-Arrival Estimation

2021 ◽  
Vol 49 (9) ◽  
pp. 2681-2689
Author(s):  
Bowen Bai ◽  
Yi Ding ◽  
Lihao Song ◽  
Yanming Liu ◽  
Xiaoping Li ◽  
...  
Keyword(s):  
Direction Of Arrival ◽  
Plasma Sheath ◽  
Array Antenna ◽  
Direction Of Arrival Estimation

scholarly journals Underwater Ambiguity Elimination Method Based on Co-Prime Sensor Array

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6058
Author(s):  
Tian Lan ◽  
Yilin Wang ◽  
Longhao Qiu
Keyword(s):  
High Resolution ◽  
Sensor Array ◽  
Direction Of Arrival ◽  
Doa Estimation ◽  
Spatial Spectrum ◽  
Estimation Methods ◽  
Sensing Applications ◽  
Passive Sensing ◽  
Spatial Spectra ◽  
Beam Patterns

Recently, the direction of arrival estimation with co-prime arrays has gradually been applied in underwater scenarios because of its significant advantages over traditional uniform linear arrays. Despite the advantages of co-prime arrays, the spatial spectra obtained directly from conventional beamforming can be degraded by grating lobes due to the sparse spatial sampling in passive sensing applications, which will seriously deteriorate the estimation performance. In this paper, capon beamforming is applied to a co-prime sensor array as a pretreatment before high-resolution direction of arrival (DOA) estimation methods. The amplitudes extracted from the beam-domain outputs of two subarrays and the phases extracted from the cross-spectrum of the spatial spectrum are exploited to suppress the spurious peaks in beam patterns and eliminate ambiguities. Consequently, interference can be further mitigated, and the performance of high-resolution DOA methods will be guaranteed. Simulations show that the method proposed can improve the reliability and accuracy of DOA estimation with great value in practice.

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