Reference sensor relocation-based thinned coprime array design for DOA estimation

To reduce the redundant information of the sensor array and alleviate the mutual coupling effect between adjacent antennas, a novel sparse array is proposed in this paper. We first analyze the range of consecutive lags in the difference coarray generated from the thinned coprime array (TCA), and derived its analytical expression of the hole positions. By investigating the influence of the 0-position sensor on the consecutive and unique lags, the new location of the 0-position sensor is sequentially determined. In particular, the closed-form expressions related to the consecutive lags and unique lags of the proposed array are derived and compared with the existing sparse arrays. Finally, simulation results demonstrate the effectiveness and superiority of the proposed method. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

In this paper, a novel sparse array is proposed to reduce redundant information of the sensor array and alleviate the mutual coupling effect between adjacent antennas. The analytical expressions of the hole positions in the difference coarray generated from the thinned coprime array (TCA) are derived through analysis of consecutive lags. The new location of the 0-position sensor is sequentially determined by investigating its influence on consecutive and unique lags, and the closed-form expressions related to the consecutive lags and unique lags are compared with existing sparse arrays to show the effectiveness and superiority of the proposed method.