The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
조회수
79
분산 배열 레이더는 수십에서 수백 개의 파장으로 분리된 여러 하위 배열로 구성되며 큰 조리개, 고이득 안테나와 좁은 빔폭을 일치시킬 수 있습니다. 서브 어레이의 물리적 독립성은 상당한 구조 유연성에 기여하며 이러한 레이더의 장점 중 하나입니다. 그러나 일반적인 문제는 DBF(Digital Beam Forming) 빔 패턴의 격자 로브입니다. 불행하게도 격자 로브의 생성을 억제해야 하는 필요성으로 인해 허용 가능한 하위 어레이 배열의 설계가 매우 어렵습니다. 본 연구에서는 이러한 문제를 해결하기 위해 시그마-델타 빔 전 도달 방향(DOA) 추정 방법을 제안합니다. 제안하는 방법은 모든 서브 어레이의 합 신호 외에 차신호를 획득하여 DOA 추정을 수행한다. 차이 신호는 일반적으로 위상 배열 레이더의 모노펄스 DOA 추정에 사용됩니다. 시그마-델타 빔형성기는 개구 길이가 큰 분산 배열을 사용하는 것과 격자 로브의 영향을 받지 않는 하위 배열을 사용하는 DOA 추정의 두 가지 장점을 동시에 갖습니다. 제안된 방법은 격자 로브 상황에서 기존 방법에 비해 DOA 추정 정확도를 향상시킬 수 있으며 분산 배열 레이더가 하위 배열 배열의 유연성을 달성하는 데 도움이 됩니다. 제안된 DOA 추정 방법의 유효성을 검증하기 위해 수치 시뮬레이션을 제시합니다.
Toshihiro ITO
Mitsubishi Electric Corp.,Kanazawa University
Shoji MATSUDA
Mitsubishi Electric Corp.
Yoshiya KASAHARA
Kanazawa University
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부
Toshihiro ITO, Shoji MATSUDA, Yoshiya KASAHARA, "Sigma-Delta Beamformer DOA Estimation for Distributed Array Radar" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 12, pp. 1589-1599, December 2022, doi: 10.1587/transcom.2021EBP3211.
Abstract: Distributed array radars consist of multiple sub-arrays separated by tens to hundreds of wavelengths and can match narrow beamwidths with large-aperture, high-gain antennas. The physical independence of the sub-arrays contributes to significant structure flexibility and is one of the advantages of such radars. However, a typical problem is the grating lobes in the digital beam forming (DBF) beam pattern. Unfortunately, the need to suppress the generation of grating lobes makes the design of acceptable sub-array arrangements very difficult. A sigma-delta beam former direction of arrival (DOA) estimation method is proposed in this study to solve this problem. The proposed method performs DOA estimation by acquiring the difference signals in addition to the sum signals of all sub-arrays. The difference signal is typically used for monopulse DOA estimation in the phased array radar. The sigma-delta beamformer simultaneously has both advantages of DOA estimations using a distributed array with a large aperture length and using a sub-array that is not affected by the grating lobe. The proposed method can improve the DOA estimation accuracy over the conventional method under grating lobe situations and help the distributed array radar achieve flexibility in the sub-array arrangement. Numerical simulations are presented to verify the effectiveness of the proposed DOA estimation method.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021EBP3211/_p
부
@ARTICLE{e105-b_12_1589,
author={Toshihiro ITO, Shoji MATSUDA, Yoshiya KASAHARA, },
journal={IEICE TRANSACTIONS on Communications},
title={Sigma-Delta Beamformer DOA Estimation for Distributed Array Radar},
year={2022},
volume={E105-B},
number={12},
pages={1589-1599},
abstract={Distributed array radars consist of multiple sub-arrays separated by tens to hundreds of wavelengths and can match narrow beamwidths with large-aperture, high-gain antennas. The physical independence of the sub-arrays contributes to significant structure flexibility and is one of the advantages of such radars. However, a typical problem is the grating lobes in the digital beam forming (DBF) beam pattern. Unfortunately, the need to suppress the generation of grating lobes makes the design of acceptable sub-array arrangements very difficult. A sigma-delta beam former direction of arrival (DOA) estimation method is proposed in this study to solve this problem. The proposed method performs DOA estimation by acquiring the difference signals in addition to the sum signals of all sub-arrays. The difference signal is typically used for monopulse DOA estimation in the phased array radar. The sigma-delta beamformer simultaneously has both advantages of DOA estimations using a distributed array with a large aperture length and using a sub-array that is not affected by the grating lobe. The proposed method can improve the DOA estimation accuracy over the conventional method under grating lobe situations and help the distributed array radar achieve flexibility in the sub-array arrangement. Numerical simulations are presented to verify the effectiveness of the proposed DOA estimation method.},
keywords={},
doi={10.1587/transcom.2021EBP3211},
ISSN={1745-1345},
month={December},}
부
TY - JOUR
TI - Sigma-Delta Beamformer DOA Estimation for Distributed Array Radar
T2 - IEICE TRANSACTIONS on Communications
SP - 1589
EP - 1599
AU - Toshihiro ITO
AU - Shoji MATSUDA
AU - Yoshiya KASAHARA
PY - 2022
DO - 10.1587/transcom.2021EBP3211
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2022
AB - Distributed array radars consist of multiple sub-arrays separated by tens to hundreds of wavelengths and can match narrow beamwidths with large-aperture, high-gain antennas. The physical independence of the sub-arrays contributes to significant structure flexibility and is one of the advantages of such radars. However, a typical problem is the grating lobes in the digital beam forming (DBF) beam pattern. Unfortunately, the need to suppress the generation of grating lobes makes the design of acceptable sub-array arrangements very difficult. A sigma-delta beam former direction of arrival (DOA) estimation method is proposed in this study to solve this problem. The proposed method performs DOA estimation by acquiring the difference signals in addition to the sum signals of all sub-arrays. The difference signal is typically used for monopulse DOA estimation in the phased array radar. The sigma-delta beamformer simultaneously has both advantages of DOA estimations using a distributed array with a large aperture length and using a sub-array that is not affected by the grating lobe. The proposed method can improve the DOA estimation accuracy over the conventional method under grating lobe situations and help the distributed array radar achieve flexibility in the sub-array arrangement. Numerical simulations are presented to verify the effectiveness of the proposed DOA estimation method.
ER -