@article{oai:ynu.repo.nii.ac.jp:00010870,
 author = {Iwasaki, Sho and Nakamura, Shogo and Ichige, Koichi},
 issue = {10},
 journal = {IEICE Transactions on Communications},
 month = {Oct},
 note = {This paper presents a weighted spatial filter (WSF) design method based on direction of arrival (DOA) estimates for a novel array configuration called a sum and difference composite co-array. A sum and difference composite co-array is basically a combination of sum and difference co-arrays. Our configuration can realize higher degrees of freedom (DOF) with the sum co-array part at a calculation cost lower than those of the other sparse arrays. To further enhance the robustness of our proposed sum and difference composite co-array we design an optimal beam pattern by WSF based on the information of estimated DOAs. Performance of the proposed system and the DOA estimation accuracy of close-impinging waves are evaluated through computer simulations.},
 pages = {1147--1154},
 title = {DOA-Based Weighted Spatial Filter Design for Sum and Difference Composite Co-Array},
 volume = {E103.B},
 year = {2020}
}