Now showing items 1-20 of 26

    • Adverse wireless communication environment impacts on AF wireless relay networks 

      Lee, Kanghee; Kwon, Hyuck M.; Kim, Deawon; Shim, Yeonggyu; Park, Hyuncheol; Lee, Yong H.; Hyun, Inha (IEEE, 2013)
      This paper proposes amplify-and-forward (AF) relay matrices for a one-source-one-destination pair and cooperative distributed N relay nodes under three adverse wireless relay communication environments: (1) broadband noise ...
    • AF MIMO wireless relay networks under received power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Kim, Hyunggi; Sawan, M. Edwin; Park, Hyuncheol; Lee, Yong H. (IEEE, 2012-09)
      This paper considers an amplify-and-forward (AF) relay scheme for M-source-M-destination pairs and N relay nodes. Cooperative minimum mean square error (MMSE) strategies for wireless relay networks under both a jamming ...
    • AF wireless relay network analysis under receiver power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Kim, Hyunggi; Lee, Sangku; Shim, Yeonggyu; Park, Hyuncheol; Lee, Yong H. (IEEE, 2013)
      This paper presents both cooperative and noncooperative amplify-and-forward (AF) relay networks consisting of a one-source-one-destination pair and N-relays under receiver power constraint (RPC) at the destination. The ...
    • Centralized two-way AF MIMO multiple dispersed relay network 

      Lee, Kanghee; Yang, Jie; Kwon, Hyuck M.; Park, Hyuncheol; Lee, Yong H. (IEEE, 2015-05-12)
      This paper considers a two-way amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay network consisting of two sources (each with multiple antennas) and multiple physically dispersed single-antenna relays. ...
    • Closed form of optimum cooperative distributed relay amplifying matrix 

      Lee, Kanghee; Yang, Jie; Kwon, Hyuck M.; Park, Hyuncheol; Lee, Yong H. (IEEE, 2014-05)
      This paper presents a closed form of an optimal cooperative amplify-and-forward (AF) relay amplifying matrix for a distributed relay network of M-source-M-destination pairs and N relays, called a cooperative distributed ...
    • Comments on "Distributed MMSE Relay Strategies for Wireless Sensor Networks" 

      Lee, Kanghee; Yang, Jie; Kwon, Hyuck M. (IEEE, 2014-07-15)
      Correction of a typographical error found in equation in the article “Distributed MMSE Relay Strategies for Wireless Sensor Networks.”
    • Cooperative AF MIMO wireless relay networks under relay power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Kim, Hyunggi; Park, Hyuncheol; Lee, Yong H. (IEEE, 2012-11)
      This paper presents an amplify-and-forward (AF) relay scheme for M-source-M-destination pairs and N relay nodes. Cooperative minimum mean square error (MMSE) and zero-forcing (ZF) strategies for wireless relay networks ...
    • Cooperative AF wireless relay strategy under relay power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Sawan, M. Edwin; Park, Hyuncheol (IEEE, 2013-11)
      This paper presents an optimal relay amplifying matrix based on various schemes, such as zero-forcing (ZF) and minimum mean square error (MMSE), for a cooperative amplify-and-forward (AF) wireless relay network consisting ...
    • Distributed AF beamforming relay networks under transmit power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Sawan, M. Edwin; Park, Hyuncheol (IEEE, 2013-11)
      This paper investigates minimum mean square error (MMSE)-based amplify-and-forward (AF) relay amplifying matrices and source/destination beamforming vectors under perfectly known channel state information by imposing ...
    • Distributed AF mobile relay networks in adverse wireless communication environments 

      Lee, Kanghee; Kwon, Hyuck M.; Yang, Jie; Sawan, M. Edwin; Park, Hyuncheol; Lee, Yong H. (IEEE, 2013)
      This paper addresses a more practical relay network consisting of a mobile source, multiple distributed mobile amplify-and-forward (AF) relays, and a mobile destination node. It considers an appropriate channel model between ...
    • MMSE relaying strategies under jamming, channel uncertainty, node geometry, and power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Yang, Jie; Sawan, M. Edwin; Park, Hyuncheol; Lee, Yong H. (IEEE, 2013)
      An amplify-and-forward (AF) relay network has been studied extensively, but a closed form of an optimal AF relaying matrix is not available yet for the distributed AF relay network with the destination power constraint ...
    • MMSE relaying strategy for two-way amplify-and-forward wireless networks 

      Lee, Kanghee; Kwon, Hyuck M.; Yang, Jie; Sawan, M. Edwin; Park, Hyuncheol; Lee, Yong H. (IEEE, 2013)
      This paper studies amplify-and-forward (AF) relay strategies for two-way wireless relay networks consisting of two sources with a single antenna and multiple relays with a single antenna. The closed form of relay amplifying ...
    • MMSE-Based amplifying relay matrix for noncooperative AF wireless relay network under power constraints 

      Lee, Kanghee; Kwon, Hyuck M.; Wang, Zuojun (IEEE, 2011-06-28)
      This paper derives analytically an optimum amplifying relay matrix using the minimum mean square error (MMSE) criteria for a noncooperative amplify-and-forward (AF) distributed relay network. Global and local power constraints ...
    • MMSE-based optimal design of full-duplex relay system 

      Lee, Kanghee; Kwon, Hyuck M.; Jo, Mansik; Park, Hyuncheol; Lee, Yong H. (IEEE, 2012-09)
      This paper studies minimum mean square error (MMSE)-based full-duplex relay processing matrices and source/destination beamforming vectors under perfect channel state information by imposing constraints on the transmit ...
    • Mobile relay amplifying matrix design of the cooperative distributed MMSE relaying for AF wireless mobile networks 

      Lee, Kanghee; Kwon, Hyuck M.; Ibdah, Yazan; Xiong, Wenhao; Sawan, M. Edwin (IEEE, 2012-05)
      This paper presents an optimal amplify-and-forward (AF) relay scheme for a multiple-input-multiple-output (MIMO) system consisting of M-mobile sources, M-mobile destinations, and N-cooperative distributed mobile relay ...
    • Noncooperative AF schemes for wireless mobile networks under jamming environment 

      Ibdah, Yazan; Kwon, Hyuck M.; Ding, Yanwu; Lee, Kanghee (IEEE, 2011-11-07)
      Communication between mobile relays has recently gained much attention. In this paper, a novel optimal diagonal relay amplifying matrix based on the minimum mean square error (MMSE) criterion is proposed for mobile nodes. ...
    • Noncooperative distributed wireless relay networks under channel uncertainty and power constraint 

      Lee, Kanghee; Kwon, Hyuck M.; Wang, Zuojun (IEEE, 2011-07-31)
      This paper derives an optimum relay amplifying matrix for a wireless relay network under channel uncertainty and received power constraints at the destination node. To achieve this objective, an amplify-and-forward strategy ...
    • A Note on "Amplify-and-Forward Relay Networks under Received Power Constraint" 

      Lee, Kanghee; Kwon, Hyuck M.; Behbahani, Alireza Shahan; Eltawil, Ahmed M. (IEEE, 2013-10)
      This letter is to correct the incorrect optimal relay coefficient at the k-th relay derived in [1] for an amplify-and-forward (AF) wireless relay network under received power constraints. While the trends remain the same, ...
    • On sequence design for relay networks with multipath 

      Yang, Jie; Lee, Kanghee; Sagar, Youvaraj T.; Kwon, Hyuck M. (IEEE, 2013)
      A method for a spreading sequence design based on signal-to-interference-plus-noise ratio (SINR) is presented in this paper. It considers the relay channel where sources communicate with the receiver via relays under ...
    • Optimal amplify-and-forward precode and relay amplifying matrices 

      Kim, Hyunggi; Kwon, Hyuck M.; Lee, Kanghee; Shim, Yeonggyu; Park, Hyuncheol; Lee, Yong H. (IEEE, 2013)
      A cooperative amplify-and-forward (AF) wireless relay scheme consisting of M sources, N relays, and L destinations all equipped with a single antenna is studied in this paper. The main objective is to design jointly and ...