scholarly journals Sequential Estimation of Frequency and Direction-of-Arrival Based on the Relaxed Coprime Array for Multiple Targets

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 80318-80332
Author(s):  
Xiangdong Huang ◽  
Lu Cao ◽  
Anan Liu
Keyword(s):  
Sequential Estimation ◽  
Direction Of Arrival ◽  
Multiple Targets ◽  
Coprime Array

Direction of Arrival Estimation Using Coprime Array with Monopole and Patch Antenna Elements

2019 ◽  
Author(s):  
Mohammed A. Yafeai ◽  
Abdulmalik H. Almazrua ◽  
Saleh A. Alawsh ◽  
Ahmad I. Oweis ◽  
Ali H. Muqaibel ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Direction Of Arrival ◽  
Direction Of Arrival Estimation ◽  
Coprime Array

scholarly journals COPRIME ARRAY PARAMETERS OPTIMIZATION FOR DOA ESTIMATION

2021 ◽  
Vol 4 (2) ◽  
pp. 23-32
Author(s):  
Fatimah A. Salman ◽  
Bayan M. Sabbar
Keyword(s):  
Mutual Coupling ◽  
Direction Of Arrival ◽  
Doa Estimation ◽  
Parameters Optimization ◽  
Degree Of Freedom ◽  
Direction Of Arrival Estimation ◽  
Sparse Arrays ◽  
Sparse Array ◽  
Simulation Results ◽  
Coprime Array

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.

scholarly journals Algorithm to Estimate Direction of Arrival with Interpolated Array Elements for Coprime Array Holes

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Guicai Yu
Keyword(s):  
Degrees Of Freedom ◽  
Signal To Noise Ratio ◽  
Direction Of Arrival ◽  
Array Element ◽  
Regular Pattern ◽  
Minimum Number ◽  
Virtual Array ◽  
Novel Method ◽  
Coprime Arrays ◽  
Coprime Array

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.

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