Direction estimation of coherent signals based on the symmetry of uniform linear array

2018 ◽  
Vol 143 (3) ◽  
pp. 1958-1958
Author(s):  
Yunqi Tian ◽  
Guolong Liang ◽  
Fu Jin
Keyword(s):  
Linear Array ◽  
Coherent Signals ◽  
Uniform Linear Array ◽  
Direction Estimation

Comparison between DOA Estimation Subspace methods for incoherent and coherent signals

2015 ◽  
Vol 1 ◽  
pp. 18
Author(s):  
Ahmed Abdalla ◽  
Suhad Mohammed ◽  
Tang Bin ◽  
Jumma Mary Atieno ◽  
Abdelazeim Abdalla
Keyword(s):  
Linear Array ◽  
Doa Estimation ◽  
Far Field ◽  
Matlab Simulation ◽  
Subspace Methods ◽  
Coherent Signals ◽  
Uniform Linear Array ◽  
Pros And Cons ◽  
Basic Concepts ◽  
And Performance

This paper considers the problem of estimating the direction of arrival (DOA) for the both incoherent and coherent signals from narrowband sources, located in the far field in the case of uniform linear array sensors. Three different methods are analyzed. Specifically, these methods are Music, Root-Music and ESPRIT. The pros and cons of these methods are identified and compared in light of different viewpoints. The performance of the three methods is evaluated, analytically, when possible, and by Matlab simulation. This paper can be a roadmap for beginners in understanding the basic concepts of DOA estimation issues, properties and performance.

Subspace-Based Method for Direction Estimation of Coherent Signals with Arbitrary Linear Array

2019 ◽  
Author(s):  
Xiao Chen ◽  
Jingmin Xin ◽  
Weiliang Zuo ◽  
Jie Li ◽  
Nanning Zheng ◽  
...  
Keyword(s):  
Linear Array ◽  
Coherent Signals ◽  
Direction Estimation

Research of Modified MUSIC Algorithm Based on Vector Matrix

2011 ◽  
Vol 403-408 ◽  
pp. 250-255
Author(s):  
Xiao Yao Wang ◽  
Guo Jun Zhang ◽  
Pan Pan Wang ◽  
Xi Bao Liu ◽  
Wen Dong Zhang
Keyword(s):  
Linear Array ◽  
Wiener Filter ◽  
Engineering Application ◽  
Original Music ◽  
Coherent Signals ◽  
Music Algorithm ◽  
Uniform Linear Array ◽  
Vector Hydrophone ◽  
The Matrix ◽  
Vector Matrix

Processing the matrix signals of vector hydrophone was critical to the research on engineering application of vector matrix. However, such processing required massive computation. Accordingly, a vector matrix based modification of MUSIC algorithm was introduced to solve such issue. The said modification lowered computation amount by applying the Wiener Filter in MUSIC algorithm to skip decomposition of eigenvalues. The method of vector hydrophone Uniform Linear Array (ULA) was adopted to test the performance of the modified algorithm. The computer simulated outcome has verified the effectiveness of such modified MUSIC algorithm, showing that the modified MUSIC algorithm can clearly distinguish the coherent signals, and is superior to the original music algorithm.

scholarly journals Micro Non-Uniform Linear Array (MNULA) for Ultrasound Plane Wave Imaging

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 640
Author(s):  
Yujia Tang ◽  
Zhangjian Li ◽  
Yaoyao Cui ◽  
Chen Yang ◽  
Jiabing Lv ◽  
...  
Keyword(s):  
Plane Wave ◽  
Linear Array ◽  
Near Field ◽  
Uniform Linear Array ◽  
Imaging Technology ◽  
Linear Arrays ◽  
Imaging Quality ◽  
Imaging Results ◽  
Wave Imaging ◽  
Laboratory Technology

Ultrasound plane wave imaging technology has been applied to more clinical situations than ever before because of its rapid imaging speed and stable imaging quality. Most transducers used in plane wave imaging are linear arrays, but their structures limit the application of plane wave imaging technology in some special clinical situations, especially in the endoscopic environment. In the endoscopic environment, the size of the linear array transducer is strictly miniaturized, and the imaging range is also limited to the near field. Meanwhile, the near field of a micro linear array has serious mutual interferences between elements, which is against the imaging quality of near field. Therefore, we propose a new structure of a micro ultrasound linear array for plane wave imaging. In this paper, a theoretical comparison is given through sound field and imaging simulations. On the basis of primary work and laboratory technology, micro uniform and non-uniform linear arrays were made and experimented with the phantom setting. We selected appropriate evaluation parameters to verify the imaging results. Finally, we concluded that the micro non-uniform linear array eliminated the artifacts better than the micro uniform linear array without the additional use of signal processing methods, especially for target points in the near-field. We believe this study provides a possible solution for plane wave imaging in cramped environments like endoscopy.

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