TY - JOUR A2 - Solimene, Raffaele AU - Zhang, Yan-kui AU - Xu, Hai-yun AU - Wang, Da-ming AU - Ba, Bin AU - Li, Si-yao PY - 2019 DA - 2019/01/29 TI - A Novel Designed Sparse Array for Noncircular Sources with High Degree of Freedom SP - 1264715 VL - 2019 AB - The existing coprime array is mainly applicable to circular sources, while the virtual array degree of freedom (DOF) for noncircular sources is enhanced limitedly. In order to perfect the array DOF and the direction of arrival (DOA) estimation accuracy, a high degree of freedom sparse array design method for noncircular sources is put forward. Firstly, the method takes the advantages of the characteristic of the noncircular sources to expand the array manifold and then explores and solves the location distribution of the physical array sensors on the basis of the virtual array model with the help of the searching approach. The array configuration can obtain the longest continuous virtual array. The comparisons between the proposed array configuration and the common array configurations are advanced. The simulation experiments show that the sparse array presented in this paper can effectively increase the continuous virtual array aperture of noncircular sources, improve the array DOF and DOA estimation accuracy, and achieve the purpose of better estimation of multiple DOAs in underdetermined conditions. SN - 1024-123X UR - https://doi.org/10.1155/2019/1264715 DO - 10.1155/2019/1264715 JF - Mathematical Problems in Engineering PB - Hindawi KW - ER -