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  1. No Access

    Article

    Fair exchange signature schemes

    In this paper a new class of fair exchange signature scheme (FESS) is proposed that allows two players to exchange digital signatures in a fair way. The new signature scheme is a general model and has various ...

    **gWei Liu, Rong Sun, KyungSup Kwak in Science China Information Sciences (2010)

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    Article

    Comprehensive Capacity Ensured Distributed Binary Power Allocation in Dense Cognitive Networks

    Considering the capacity gain of the secondary system and the capacity loss of the primary system caused by the newly accessing user, a distributed binary power allocation (admittance criterion) is proposed in...

    Chengshi Zhao, Kyungsup Kwak in Journal of Network and Systems Management (2010)

  3. No Access

    Chapter and Conference Paper

    Improving Handoff Performance by Using Distance-Based Dynamic Hysteresis Value

    In this study, an adaptive handoff algorithm with a dynamic hysteresis value, based on the distance between the mobile station and the serving base station, is proposed for cellular communications. Handoff pro...

    Huamin Zhu, Kyungsup Kwak in Management of Convergence Networks and Services (2006)

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    Chapter and Conference Paper

    Performance Analysis of an Adaptive Soft Handoff Algorithm for Mobile Cellular Systems

    In this paper, an adaptive soft handoff algorithm, which dynamically calculates the threshold values for soft handoff based on the received signal strength, is proposed for mobile cellular communication system...

    Huamin Zhu, Kyungsup Kwak in Management of Convergence Networks and Services (2006)

  5. No Access

    Chapter and Conference Paper

    Performance Analysis of DS-BPAM UWB System over Fading Channels—Uncoded and Coded Schemes

    This paper investigates the performance of two direct sequence ultra wideband (DS-UWB) communication systems over multipath fading channels. The first system is the classic DS-UWB system and the second is obta...

    Zhiquan Bai, Shaoyi Xu, Weihua Zhang, Kyungsup Kwak in Embedded and Ubiquitous Computing (2006)

  6. No Access

    Chapter and Conference Paper

    Flexible ZCD-UWB with High QoS or High Capacity Using Variable ZCD Factor Code Sets

    In this paper, we propose a Variable ZCD(Zero Correlation Duration) Factor Code Sets. Additionaly, Flexible ZCD-UWB(Ultra Wide Band) with High QoS or High Capacity using Variable ZCD Factor Code Sets are prese...

    Jaesang Cha, Kyungsup Kwak, Changdae Yoon… in Computational Science and Its Applications… (2005)

  7. No Access

    Chapter and Conference Paper

    Interference-Free ZCD-UWB for Wireless Home Network Applications

    Interference-free ZCD-UWB for Wireless Home Network Applications(WHNA) are presented in this paper. Interference-free ZCD-UWB could be a very useful solution for an enhanced wireless home network applications ...

    Jaesang Cha, Kyungsup Kwak, Sangyule Choi… in Computational Science and Its Applications… (2005)