Wai Ho Mow
Hong Kong University of Science and Technology, Hong Kong (China)
Title : Some Recent Variants of Lattice Algorithms in Communications
Abstract :

The lattice formulation of signal detection problems has led to some of the most efficient detectors known. The key idea behind is to derive a class of equivalent channels with respect to the unimodular transform for lattices so that very low complexity highly suboptimal detectors applied to a desirable equivalent channel can be turned into high performance low complexity detectors. Many signal detection algorithms for MIMO communications are rediscoveries and variants of known lattice algorithms in the theoretical computer science areas, in particular, cryptography and computational number theory. Some examples are lattice sequence detectors, sphere decoding, lattice-reduction-aided detectors, etc. Communications application considerations also bring new challenges to the design of lattice algorithms, leading to some interesting new developments. The purpose of this talk is to review the connections between lattice algorithms in communications and those in theoretical computer science and highlight some recent variants developed for signal detection, which are apparently not known in computer science and are potentially promising in cryptographic applications.

Biography :

Wai Ho MOW received his PhD degree in Information Engineering from the Chinese University of Hong Kong. He was a visiting research fellow at the University of Waterloo in Canada, the Munich University of Technology (TUM) in Germany, and the Kyoto University in Japan in 1995, 1996 and early 2000, respectively. From 1997 to 1999 , he was an assistant professor at the Nanyang Technological University, Singapore. He joined the Hong Kong University of Science and Technology since 2000. In 2010, he spent his sabbatical visiting the Center for Magnetic Recording Research at University of California, San Diego. He was the recipient of the Croucher Research Fellowship (HK), the Humboldt Research Fellowship (Germany), the Telecommunications Advancement Research Fellowship (Japan), the Tan Chin Tuan Academic Exchange Fellowship (Singapore), the Wong Kuan Cheng Education Foundation Academic Exchange Award (China), the Foreign Expert Bureau Fellowship (China) and the Royal Academy of Engineering Award for Short Research Exchanges with China and India (UK). His research interests are in the areas of wireless communications, coding and information theory. He pioneered the lattice approach to signal detection problems and unified all known constructions of perfect roots-of-unity sequences (widely used as CAZAC preambles and radar signals). Since Jun 2002, he has been the principal investigator of over 10 funded research projects. He has published 1 book, and co-authored over 20 filed patent applications and over 100 technical publications, among which he is the sole author of over 40. He co-authored a paper that received the ISITA2002 Paper Award for Young Researchers and supervised one student who won the first prize in the IEEE HK Section Postgraduate Paper Contest. He was the chair of the Hong Kong Chapter of the IEEE Information Theory Society in 2005. He was a technical program co-chair of 5 conferences and served the technical program committees of many conferences such as Globecom, ICC, ISITA, ITW, VTC and WCNC. He was the guest  (associate) editor for 3 special issues of the IEICE Transactions on Fundamentals. He was a member of the Radio Spectrum Advisory Committee, Office of the Telecommunications Authority, the Hong Kong S.A.R. Government from 2003 to 2008.


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