Abstract
In our presentation, the following views are provided: Cognitive Radio (CR) is playing an increasingly important role in solving critical problems in cellular communications. For an instance, CR methodology has been widely recognized as one of major ways for interference avoidance and network selection. These subjects are expected to be of an enormous significance in the Heterogeneous Network (HetNet) environment of 3GPP LTE-A and Beyond-LTE-A; The research fruit in CR boosts and determines both of their system-level spectrum-efficiency and radio-link reliability; As an flexible implementation technique, software defined radio (SDR) becomes a main-stream design style for CR; SDR fashion exhibits prominent advantages in dealing with the rapid base-band scheme upgrading to meet the requirements of the long-term fast-paced network evolution; In current practice, SDR is able to greatly ease cost and time-efficiency control in the network air-interface upgrading; In the past 5 years, DOCOMO Beijing labs (DBL) has conducted a series of active R&D projects in the areas of CR and SDR, the work not only included innovation on the CR schemes and algorithms, but also SDR experiments for verifying novel MIMO techniques; DBL is committed to continue such effort in contributing both theoretical research and experimental design for advanced cellular network enhancements in the future.
Speaker Biography
Zhan Zhang, received his B.S. degree from Northwestern Polytechnical University, Xi’an, China, in 1990; M.S. degree from Beijing Institute of Technology, Beijing, China, in 1996; and Ph. D. degree from Dalhousie University, NS, Canada, in 2004, all in electrical engineering. IEEE member since 2000.
He was an R&D engineer with China Aerospace Sci. and Tech. Corp. (CASC), Beijing, from 1990 to 1993; with SAMSUNG Elec. Corp. (SEC), Gyeonggi-Do, Korea, from 1996 to 1998; and was a research assistant and postgraduate student with Elec. & Comp. Eng. of Concordia University, Montreal, Canada, from 1999 to 2000. At present, he works as a Principal Researcher/Project Manager with NTT DOCOMO Beijing Comm. Lab. Co., Ltd., from Nov. 2004. He has been conducting research on radio air-interface design of wireless networks, primarily including CDMA/OFDM/OFDMA; adaptive MIMO transceiver; channel estimation/equalization; adaptive cellular-system radio-resource allocation and transmission control; space-time coding, statistical signal processing, cognitive radio in wireless communications. He received a “Best Paper Award” as a co-author at Asia-Pacific Conference on Communications (APCC), 2008.
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