Asher J. Willner
University of Southern California
57 Papers
302 Citations
Asher J. Willner is an academic researcher from University of Southern California. The author has contributed to research in topics: Multiplexing & Phase-shift keying. The author has an hindex of 20, co-authored 57 publications.
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Papers
Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications.
Yongxiong Ren,Long Li,Zhe Wang,Seyedeh Mahsa Kamali,Ehsan Arbabi,Amir Arbabi,Zhe Zhao,Guodong Xie,Yinwen Cao,Nisar Ahmed,Yan Yan,Cong Liu,Asher J. Willner,Solyman Ashrafi,Moshe Tur,Andrei Faraon,Alan E. Willner +16 more
TL;DR: In this article, the spatial domain is employed to simultaneously transmit multiple orthogonal spatial beams, each carrying an independent data channel, and the degradation effects of scattering/turbidity, water current, and thermal gradient-induced turbulence are investigated.
Free-space optical communications using orbital-angular-momentum multiplexing combined with MIMO-based spatial multiplexing.
Yongxiong Ren,Zhe Wang,Guodong Xie,Long Li,Yinwen Cao,Cong Liu,Peicheng Liao,Yan Yan,Nisar Ahmed,Zhe Zhao,Asher J. Willner,Nima Ashrafi,Solyman Ashrafi,Roger D. Linquist,Robert Bock,Moshe Tur,Andreas F. Molisch,Alan E. Willner +17 more
TL;DR: This work experimentally demonstrates an 80 Gbit/s FSO system with a 2×2 aperture architecture, in which each transmitter aperture contains two multiplexed data-carrying OAM modes, indicating that OAM and MIMO-based spatial multiplexing could be simultaneously utilized, thereby providing the potential to enhance system performance.
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Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization.
Yongxiong Ren,Zhe Wang,Guodong Xie,Long Li,Asher J. Willner,Yinwen Cao,Zhe Zhao,Yan Yan,Nisar Ahmed,Nima Ashrafi,Solyman Ashrafi,Robert Bock,Moshe Tur,Alan E. Willner +13 more
TL;DR: In a 2×2 FSO link with each transmitter aperture containing two multiplexed OAM modes, at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.
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Mode-Division-Multiplexing of Multiple Bessel-Gaussian Beams Carrying Orbital-Angular-Momentum for Obstruction-Tolerant Free-Space Optical and Millimetre-Wave Communication Links
Nisar Ahmed,Zhe Zhao,Long Li,Hao Huang,Martin P. J. Lavery,Peicheng Liao,Yan Yan,Zhe Wang,Guodong Xie,Yongxiong Ren,Ahmed Almaiman,Asher J. Willner,Solyman Ashrafi,Andreas F. Molisch,Moshe Tur,Alan E. Willner +15 more
TL;DR: It is shown that Bessel-Gaussian orbital- angular-momentum beams are more tolerant to obstructions than non-Bessel orbital-angular-momentsum beams, and crosstalk and power penalty when data is transmitted are reduced.
Experimental demonstration of 20 Gbit/s data encoding and 2 ns channel hopping using orbital angular momentum modes.
Asher J. Willner,Yongxiong Ren,Guodong Xie,Zhe Zhao,Yinwen Cao,Long Li,Nisar Ahmed,Zhe Wang,Yan Yan,Peicheng Liao,Cong Liu,Mohammad Mirhosseini,Robert W. Boyd,Moshe Tur,Alan E. Willner +14 more
TL;DR: The use of the spatial domain as a degree of freedom for data encoding and channel hopping is explored and the influence of mode spacing and time misalignment between modal channels on the switching crosstalk and bit-error rates is investigated.
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