Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing

doi:10.1109/TAP.2019.2938850

	Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing
	Gao, Xinlu 1; Song, Xiyao 1; Zheng, Zhennan 1; Xie, Mutong 1,2; Huang, Shanguo 1
	2020
发表期刊	IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
ISSN	0018-926X
卷号	68 期号:1 页码:521-526
摘要	Misalignment measurement is important in radio frequency orbital angular momentum (RF-OAM)-related communication and radar applications. Misalignment causes distorted vortex wavefront and OAM spectra dispersion, therefore a conventional gradient method cannot be used directly. We propose a misaligned measurement method for RF-vortex beams based on image processing. Theoretical analysis and numerical simulations of the misaligned OAM wavefront demonstrate that the misalignment information can be measured by extracting the features of the OAM mean value distribution and the OAM variance value distribution. It is found in this paper that the extrema of mean OAM distribution and OAM variance distribution correspond to the tilted singularity point and original pivot point, separately. These extrema points can be found by image processing algorithms that recognize round speckles. A proof-of-concept experiment is presented, which employs a 2-D scanning probe to measure a 10-tilted OAM beam with mode 1. The tilt measurement error is only 0.39.
关键词	Measurement by laser beam Laser beams Antenna measurements Extraterrestrial measurements Image processing Distortion measurement Spectral analysis Antenna radiation patterns dipole radiation image processing misalignment measurement orbital angular momentum (OAM)
DOI	10.1109/TAP.2019.2938850
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[61690195] ; National Natural Science Foundation of China (NSFC)[61605015] ; National Natural Science Foundation of China (NSFC)[61575028] ; National Natural Science Foundation of China (NSFC)[61801038] ; National Natural Science Foundation of China (NSFC)[61622102] ; National Natural Science Foundation of China (NSFC)[61821001]
WOS研究方向	Engineering ; Telecommunications
WOS类目	Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:000507301000050
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/15021
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Xie, Mutong; Huang, Shanguo
作者单位	1.Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China 2.Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gao, Xinlu,Song, Xiyao,Zheng, Zhennan,et al. Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing[J]. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION,2020,68(1):521-526.
APA	Gao, Xinlu,Song, Xiyao,Zheng, Zhennan,Xie, Mutong,&Huang, Shanguo.(2020).Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing.IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION,68(1),521-526.
MLA	Gao, Xinlu,et al."Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing".IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 68.1(2020):521-526.