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A Grouping Technique for Synchronous Digital Duplexing Systems  

Ko, Yo-Han (School of Electrical & Electronic Engineering, Chung-Ang University)
Park, Chang-Hwan (School of Electrical & Electronic Engineering, Chung-Ang University)
Park, Kyung-Won (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute)
Jeon, Won-Gi (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute)
Paik, Jong-Ho (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute)
Lee, Seok-Pil (Digital Media Research Center, Korea Electronics Technology Institute)
Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.4C, 2009 , pp. 341-348 More about this Journal
Abstract
In this paper, we propose a grouping technique for the SDD(Synchronous Digital Duplexing) based on OFDMA(Orthogonal Frequency Division Multiple Access). The SDD has advantages of increasing data efficiency and flexibility of resource since SDD can transmit uplink signals and downlink signals simultaneously by using mutual time information and mutual channel information, obtained during mutual ranging process. However, the SDD has a disadvantage of requiring additional CS to maintain orthogonality of OFDMA symbols when the sum of mutual time difference and mutual channel length between AP(access point) and SS(subscriber station) or among SSs are larger than CP length. In order to minimize the length of CS for the case of requiring additional CS in SDD, we proposes a grouping technique which controls transmit timing and receive timing of AP and SS in a cell by classifying them into groups. Performances of the proposed grouping technique are evaluated by computer simulation.
Keywords
SOD; OFDMA; cyclic suffix; grouping;
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Times Cited By KSCI : 1  (Citation Analysis)
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