The Experts below are selected from a list of 852 Experts worldwide ranked by ideXlab platform
Rongguang Liang - One of the best experts on this subject based on the ideXlab platform.
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random three step phase retrieval approach based on difference map gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics and Lasers in Engineering, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:Abstract To achieve high measurement accuracy with less computational time in phase-shifting interferometry, a random phase retrieval approach based on difference map Gram–Schmidt othonormalization and Lissajous ellipse fitting method (DGS-LEF) is proposed, it easy to implement and only needs three phase shifted interferograms, it doesn't need pre-filtering, moreover, the phase shift can be random except for too small relative phase shift between two adjacent interferograms, last but not least, this method is effective for the symmetrical and asymmetrical fringes. The simulations and experiments verify the correctness and feasibility of DGS-LEF.
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two step random phase retrieval approach based on gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics Express, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:To overcome the phase shift error in phase shifting interferometry, a two-step random phase retrieval approach based on Gram-Schmidt (GS) Orthonormalization and Lissajous ellipse fitting (LEF) method (GS&LEF) is proposed. It doesn’t need pre-filtering, and can obtain relatively accurate phase distribution with only two phase shifted interferograms and less computational time. It is suitable for different background intensity, modulation amplitude distributions and noises. Last but not least, this method is effective for circular, straight or complex fringes. The simulations and experiments verify the correctness and feasibility of GS&LEF.
Yu Zhang - One of the best experts on this subject based on the ideXlab platform.
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random three step phase retrieval approach based on difference map gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics and Lasers in Engineering, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:Abstract To achieve high measurement accuracy with less computational time in phase-shifting interferometry, a random phase retrieval approach based on difference map Gram–Schmidt othonormalization and Lissajous ellipse fitting method (DGS-LEF) is proposed, it easy to implement and only needs three phase shifted interferograms, it doesn't need pre-filtering, moreover, the phase shift can be random except for too small relative phase shift between two adjacent interferograms, last but not least, this method is effective for the symmetrical and asymmetrical fringes. The simulations and experiments verify the correctness and feasibility of DGS-LEF.
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two step random phase retrieval approach based on gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics Express, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:To overcome the phase shift error in phase shifting interferometry, a two-step random phase retrieval approach based on Gram-Schmidt (GS) Orthonormalization and Lissajous ellipse fitting (LEF) method (GS&LEF) is proposed. It doesn’t need pre-filtering, and can obtain relatively accurate phase distribution with only two phase shifted interferograms and less computational time. It is suitable for different background intensity, modulation amplitude distributions and noises. Last but not least, this method is effective for circular, straight or complex fringes. The simulations and experiments verify the correctness and feasibility of GS&LEF.
Xiaobo Tian - One of the best experts on this subject based on the ideXlab platform.
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random three step phase retrieval approach based on difference map gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics and Lasers in Engineering, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:Abstract To achieve high measurement accuracy with less computational time in phase-shifting interferometry, a random phase retrieval approach based on difference map Gram–Schmidt othonormalization and Lissajous ellipse fitting method (DGS-LEF) is proposed, it easy to implement and only needs three phase shifted interferograms, it doesn't need pre-filtering, moreover, the phase shift can be random except for too small relative phase shift between two adjacent interferograms, last but not least, this method is effective for the symmetrical and asymmetrical fringes. The simulations and experiments verify the correctness and feasibility of DGS-LEF.
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two step random phase retrieval approach based on gram schmidt Orthonormalization and lissajous ellipse fitting method
Optics Express, 2019Co-Authors: Yu Zhang, Xiaobo Tian, Rongguang LiangAbstract:To overcome the phase shift error in phase shifting interferometry, a two-step random phase retrieval approach based on Gram-Schmidt (GS) Orthonormalization and Lissajous ellipse fitting (LEF) method (GS&LEF) is proposed. It doesn’t need pre-filtering, and can obtain relatively accurate phase distribution with only two phase shifted interferograms and less computational time. It is suitable for different background intensity, modulation amplitude distributions and noises. Last but not least, this method is effective for circular, straight or complex fringes. The simulations and experiments verify the correctness and feasibility of GS&LEF.
J M Carazo - One of the best experts on this subject based on the ideXlab platform.
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two step demodulation based on the gram schmidt Orthonormalization method
Optics Letters, 2012Co-Authors: Javier Vargas, Antonio J Quiroga, C O S Sorzano, J C Estrada, J M CarazoAbstract:This Letter presents an efficient, fast, and straightforward two-step demodulating method based on a Gram-Schmidt (GS) Orthonormalization approach. The phase-shift value has not to be known and can take any value inside the range (0,2π), excluding the singular case, where it corresponds to π. The proposed method is based on determining an orthonormalized interferogram basis from the two supplied interferograms using the GS method. We have applied the proposed method to simulated and experimental interferograms, obtaining satisfactory results. A complete MATLAB software package is provided at http://goo.gl/IZKF3.
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Two-step demodulation based on the Gram–Schmidt Orthonormalization method
2011Co-Authors: Javier Vargas, Antonio J Quiroga, C O S Sorzano, J C Estrada, J M CarazoAbstract:This Letter presents an efficient, fast, and straightforward two-step demodulating method based on a Gram–Schmidt (GS) Orthonormalization approach. The phase-shift value has not to be known and can take any value inside the range 0; 2π, excluding the singular case, where it corresponds to π. The proposed method is based on determining an orthonormalized interferogram basis from the two supplied interferograms using the GS method. We have applied the proposed method to simulated and experimental interferograms, obtaining satisfactory results. A complet
G L Stuber - One of the best experts on this subject based on the ideXlab platform.
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frequency domain equalization for continuous phase modulation
IEEE Transactions on Wireless Communications, 2005Co-Authors: Jun Tan, G L StuberAbstract:Single-carrier frequency-domain equalization (SC-FDE) is proposed for continuous phase modulation (CPM). Two different discrete representations of the CPM signal are obtained. One is an orthogonal representation obtained from the Gram-Schmidt Orthonormalization procedure, and the other is obtained from Laurent's decomposition for binary CPM. The methodology for maintaining phase continuity with a cyclic guard interval is presented. Various optimal and suboptimal reduced-complexity approaches are suggested for SC-FDE of CPM signals. General full- and partial-response CPM waveforms, and specific examples of minimum-shift keying (MSK) and Gaussian MSK (GMSK) with BT=0.3 are investigated. Simulation results show that SC-FDE for CPM is an effective approach for CPM on channels having long impulse responses.
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frequency domain equalization for continuous phase modulation
Personal Indoor and Mobile Radio Communications, 2004Co-Authors: Jun Tan, G L StuberAbstract:Frequency-domain equalization for continuous phase modulation (CPM) is investigated. A discrete representation of the CPM signal is obtained by using the Gram-Schmidt Orthonormalization procedure. The CPM discrete signal representation admits frequency-domain equalization for the purpose of mitigating intersymbol interference. General full- and partial-response CPM waveforms, and specific examples of MSK and GMSK with BT=0.3 are considered. Frequency-domain equalization is shown to be effective for CPM on severe frequency-selective fading channels.
