Author
Joseph M. Kahn
Other affiliations: University of California, Los Angeles, Tokyo University of Science, Qualcomm ...read more
Bio: Joseph M. Kahn is an academic researcher from Stanford University. The author has contributed to research in topics: Multi-mode optical fiber & Multiplexing. The author has an hindex of 66, co-authored 360 publications receiving 26273 citations. Previous affiliations of Joseph M. Kahn include University of California, Los Angeles & Tokyo University of Science.
Papers published on a yearly basis
Papers
More filters
01 Nov 2012
TL;DR: This work has shown that strongly coupled modal group delays or gains depend only on the number of modes and the variances of accumulated delay or gain, and can be derived from the eigenvalue distributions of certain random matrices.
Abstract: Mode coupling is a key to overcoming major challenges in coherent mode-division-multiplexed systems Strong mode coupling reduces the modal group delay spread, minimizing the complexity of multi-input multi-output signal processing Likewise, strong mode coupling mitigates the mode-dependent gain of optical amplifiers, maximizing average channel capacity When combined with modal dispersion, strong mode coupling creates frequency diversity, dramatically reducing outage probability Remarkably, the statistical distributions of strongly coupled modal group delays or gains depend only on the number of modes and the variances of accumulated delay or gain, and can be derived from the eigenvalue distributions of certain random matrices
22 Dec 2011
TL;DR: Three direct-detection orthogonal frequency-division multiplexing schemes in combating multipath distortion in indoor optical wireless links are evaluated, comparing them to unipolar M-ary pulse-amplitude modulation with minimum mean-square error decision-feedback equalization (MMSE-DFE).
Abstract: We evaluate the performance of three direct-detection orthogonal frequency-division multiplexing (OFDM) schemes in combating multipath distortion in indoor optical wireless links, comparing them to unipolar M-ary pulse-amplitude modulation (M-PAM) with minimum mean-square error decision-feedback equalization (MMSE-DFE).
01 Jan 1992
TL;DR: In this article, the authors discuss key impairments to high-speed communication using non-ciirectional iqrared links: small received signal paver in the face of potentially intense ambient infrared radiation, and intersymbol interference caused by multipath opt fcal propagation.
Abstract: wide-area infrared beams can be used to establish highspeed digital linAs between portable terminals and a base station, allowing construction of in-building wireless local-area networks. We discuss key impairments to highspeed communication using non-ciirectional iqrared links: small received signal paver in the face of potentially intense ambient infrared radiation, and intersymbol interference caused by multipath opt fcal propagation. We discuss transmitter and receiver &sign sfrategies to achieve a high signal-to-noise ratio. We present experimental measurements of multipath dispersion, and we evaluate the performance of two communication techniques that attempt to counter multipath distortion: baseband on@ keying with adaptive decision-feedback equalization and multiple-subcarrier modulation.
11 Jul 2016
TL;DR: This work proposes and compares three methods for estimating a multi-mode fiber channel matrix using phase retrieval and describes link architectures for direct-detection mode-division multiplexing.
Abstract: We describe link architectures for direct-detection mode-division multiplexing. We propose and compare three methods for estimating a multi-mode fiber channel matrix using phase retrieval.
Cited by
More filters
TL;DR: The concept of sensor networks which has been made viable by the convergence of micro-electro-mechanical systems technology, wireless communications and digital electronics is described.
17,936 citations
TL;DR: The current state of the art of sensor networks is captured in this article, where solutions are discussed under their related protocol stack layer sections.
Abstract: The advancement in wireless communications and electronics has enabled the development of low-cost sensor networks. The sensor networks can be used for various application areas (e.g., health, military, home). For different application areas, there are different technical issues that researchers are currently resolving. The current state of the art of sensor networks is captured in this article, where solutions are discussed under their related protocol stack layer sections. This article also points out the open research issues and intends to spark new interests and developments in this field.
14,048 citations
Proceedings Article•
01 Jan 2005
TL;DR: This book aims to provide a chronology of key events and individuals involved in the development of microelectronics technology over the past 50 years and some of the individuals involved have been identified and named.
Abstract: Alhussein Abouzeid Rensselaer Polytechnic Institute Raviraj Adve University of Toronto Dharma Agrawal University of Cincinnati Walid Ahmed Tyco M/A-COM Sonia Aissa University of Quebec, INRSEMT Huseyin Arslan University of South Florida Nallanathan Arumugam National University of Singapore Saewoong Bahk Seoul National University Claus Bauer Dolby Laboratories Brahim Bensaou Hong Kong University of Science and Technology Rick Blum Lehigh University Michael Buehrer Virginia Tech Antonio Capone Politecnico di Milano Javier Gómez Castellanos National University of Mexico Claude Castelluccia INRIA Henry Chan The Hong Kong Polytechnic University Ajit Chaturvedi Indian Institute of Technology Kanpur Jyh-Cheng Chen National Tsing Hua University Yong Huat Chew Institute for Infocomm Research Tricia Chigan Michigan Tech Dong-Ho Cho Korea Advanced Institute of Science and Tech. Jinho Choi University of New South Wales Carlos Cordeiro Philips Research USA Laurie Cuthbert Queen Mary University of London Arek Dadej University of South Australia Sajal Das University of Texas at Arlington Franco Davoli DIST University of Genoa Xiaodai Dong, University of Alberta Hassan El-sallabi Helsinki University of Technology Ozgur Ercetin Sabanci University Elza Erkip Polytechnic University Romano Fantacci University of Florence Frank Fitzek Aalborg University Mario Freire University of Beira Interior Vincent Gaudet University of Alberta Jairo Gutierrez University of Auckland Michael Hadjitheodosiou University of Maryland Zhu Han University of Maryland College Park Christian Hartmann Technische Universitat Munchen Hossam Hassanein Queen's University Soong Boon Hee Nanyang Technological University Paul Ho Simon Fraser University Antonio Iera University "Mediterranea" of Reggio Calabria Markku Juntti University of Oulu Stefan Kaiser DoCoMo Euro-Labs Nei Kato Tohoku University Dongkyun Kim Kyungpook National University Ryuji Kohno Yokohama National University Bhaskar Krishnamachari University of Southern California Giridhar Krishnamurthy Indian Institute of Technology Madras Lutz Lampe University of British Columbia Bjorn Landfeldt The University of Sydney Peter Langendoerfer IHP Microelectronics Technologies Eddie Law Ryerson University in Toronto
7,826 citations
01 Aug 2000
TL;DR: Greedy Perimeter Stateless Routing is presented, a novel routing protocol for wireless datagram networks that uses the positions of routers and a packet's destination to make packet forwarding decisions and its scalability on densely deployed wireless networks is demonstrated.
Abstract: We present Greedy Perimeter Stateless Routing (GPSR), a novel routing protocol for wireless datagram networks that uses the positions of routers and a packet's destination to make packet forwarding decisions. GPSR makes greedy forwarding decisions using only information about a router's immediate neighbors in the network topology. When a packet reaches a region where greedy forwarding is impossible, the algorithm recovers by routing around the perimeter of the region. By keeping state only about the local topology, GPSR scales better in per-router state than shortest-path and ad-hoc routing protocols as the number of network destinations increases. Under mobility's frequent topology changes, GPSR can use local topology information to find correct new routes quickly. We describe the GPSR protocol, and use extensive simulation of mobile wireless networks to compare its performance with that of Dynamic Source Routing. Our simulations demonstrate GPSR's scalability on densely deployed wireless networks.
7,384 citations