2024-03-28T19:43:33Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00001771
2022-12-15T04:25:39Z
423:424:425
453:454
A Novel DOA Estimation Error Reduction Preprocessing Scheme of Correlated Waves for Khatri-Rao Product Extended-Array
Shirai, Satoshi
Yamada, Hiroyoshi
Yamaguchi, Yoshio
Copyright(C)2013 IEICE
DOA estimation
Khatri-Rao Product
nested array
degrees freedom
In this paper, we study on direction-of-arrival (DOA) estimation error reduction by Khatri-Rao (KR) product extended array in the presence of correlated waves. Recently, a simple array signal processing technique called KR product extended array has been proposed. By using the technique, degrees-of-freedom of an array can be easily increased. However, DOA estimation accuracy deteriorates when correlated or coherent waves arrive. Such highly correlated waves often arrive for radar application, hence error reduction technique has been desired. Therefore, in this paper, we propose a new method for error reduction preprocessing scheme by using N-th root of matrix. The N-th root of matrix has a similar effect to the spatial smoothing preprocessing for highly correlated signals. As a result, DOA estimation error due to signal correlation will be reduced. The optimal order of N depends on the data itself. In this paper, a simple iterative method to obtain adaptive N is also proposed. Computer simulation results are provided to show performance of the proposed method.
The Institute of Electronics, Information and Communication Engineers
2013-10
eng
journal article
VoR
http://hdl.handle.net/10191/30818
https://niigata-u.repo.nii.ac.jp/records/1771
http://doi.org/10.1587/transcom.e96.b.2475
http://www.ieice.org/jpn/trans_online/
AA10826261
0916-8516
IEICE transactions on communications
E96-B
10
2475
2482
https://niigata-u.repo.nii.ac.jp/record/1771/files/E96-B_10_2475-2482.pdf
application/pdf
1.2 MB
2019-07-29