A New Coprime Array with High Degree of Freedom Based on the Difference and Sum Co-array

Yupu CHEN; Xiaochuan MA; Xuan LI

doi:10.11999/JEIT200505

Volume 43 Issue 3

Mar. 2021

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Article Navigation > Journal of Electronics & Information Technology > 2021 > 43(3): 717-726

Yupu CHEN, Xiaochuan MA, Xuan LI. A New Coprime Array with High Degree of Freedom Based on the Difference and Sum Co-array[J]. Journal of Electronics & Information Technology, 2021, 43(3): 717-726. doi: 10.11999/JEIT200505

Citation:

Yupu CHEN, Xiaochuan MA, Xuan LI. A New Coprime Array with High Degree of Freedom Based on the Difference and Sum Co-array[J]. Journal of Electronics & Information Technology, 2021, 43(3): 717-726. doi: 10.11999/JEIT200505

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A New Coprime Array with High Degree of Freedom Based on the Difference and Sum Co-array

doi: 10.11999/JEIT200505

1.
Key Laboratory of Information Technology for Autonomous Underwater Vehicles, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2020-06-19
Rev Recd Date: 2020-11-10

Available Online: 2020-12-05

Publish Date: 2021-03-22

Abstract

Abstract

To deal with the problem that the Degree Of Freedom(DOF) of uniform linear array is limited by the number of elements, a new type of coprime array is proposed called Displaced Coprime Array(DCA).It takes use of the conjugate augmented matrix which is formed by the time and space information of the received signal to obtain the equivalent difference and sum co-array and to estimate the Direction Of Arrival(DOA). DCA places the generalized coprime array at a certain distance from the single array element at the coordinate origin so that the elements of the sum co-array and the difference co-array are complemented. As a result, the use of DOF provided by the sum co-array can be maximized. In this paper, the closed-form expressions of the element positions and the placement distance of DCA are given. Then, the performance of the sum co-array and the difference co-array including the continuous elements and the hole positions is theoretically analyzed, the relationship between the two is given and high DOF of DCA is presented. Multiple simulations verify the effectivity of DOA estimation using DCA.
- Direction Of Arrival (DOA) estimation,
- Coprime array,
- Difference and sum co-array,
- High Degree Of Freedom (DOF)

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References(25)

References

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