Direction-of-Arrival Estimation for Coprime Array via Virtual Array Interpolation

2018 ◽  
Vol 66 (22) ◽  
pp. 5956-5971 ◽  
Author(s):  
Chengwei Zhou ◽  
Yujie Gu ◽  
Xing Fan ◽  
Zhiguo Shi ◽  
Guoqiang Mao ◽  
...  
Author(s):  
Mohammed A. Yafeai ◽  
Abdulmalik H. Almazrua ◽  
Saleh A. Alawsh ◽  
Ahmad I. Oweis ◽  
Ali H. Muqaibel ◽  
...  

2021 ◽  
Vol 4 (2) ◽  
pp. 23-32
Author(s):  
Fatimah A. Salman ◽  
Bayan M. Sabbar

Sparse array such as the coprime array is one of the most preferable sparse arrays for direction of arrival estimation due to its properties, like simplicity, capability of resolving more sources than the number of elements and resistance to mutual coupling issue.  In this paper, a new coprime array model is proposed to increase the number of degree of freedom (DOF) and improve the performance of coprime array.   The new designed array can avoid the mutual coupling by minimizing the lag redundancy and expand the central lags in the virtual difference co-array. Thus, the propose structure can resolve more sources than the prototype coprime array using the same number of elements with improved direction of arrival estimation. Simulation results demonstrate that the proposed array model is more efficient than the others coprime array model.


2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Guicai Yu

A novel method for adding antennas in the coprime arrays is introduced in this study, in order to solve the problem of the reduced degree of freedom of the array in the hole-existing coprime arrays. The minimum number of antennas interpolated in the algorithm maximizes the available degrees of freedom of virtual arrays, and the number of interpolated antennas does not change the original aperture size of the coprime arrays. With the proposed algorithm, the estimate of the direction of arrival is more accurate for a given signal-to-noise ratio. The scheme first finds the regular pattern of hole positions in virtual array elements, and then, according to the regular pattern, the position of the hole of the partial virtual array element is interpolated with the array element antenna at the position of the corresponding coprime arrays. The holes of the virtual array element are filled, giving virtual uniform continuous array elements with maximum degrees of freedom. We use the ESPRIT, and the simulation results show that the proposed algorithm improves the accuracy and resolution of estimates of the direction of arrival.


2019 ◽  
Vol 94 ◽  
pp. 45-55 ◽  
Author(s):  
Zongyu Zhang ◽  
Chengwei Zhou ◽  
Yujie Gu ◽  
Jinfang Zhou ◽  
Zhiguo Shi

Sign in / Sign up

Export Citation Format

Share Document