Browsing 10 Technology by Author "Nguyen Dinh"

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Browsing 10 Technology by Author "Nguyen Dinh"

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  • Antenna Selection in Rank-Deficient MIMO Systems 
    Vu Thang; Nguyen Dinh; Trinh Vu (IEEE, 2008)
    In a rank-deficient MIMt> system, the number of non-zero eigen-modes is smaller than min In such a system, it is desirable to be able to identify then eliminate the most 'inactive' antennas or equivalently to select the ...
  • Effects of Users Mobility on the Selection of Time Slot Size in TDMA Wireless Networks 
    Trang Chung; Nguyen Dinh; Nguyen Tuan (Vietnam National University Publisher, 2008)
    Users mobility in wireless networks has the obvious effect of increasing the channel fading fluctuation rate, hence the efficiency of opportunistic scheduling algorithms. In time-slotted wireless systems, the chosen slot ...
  • An finite-state Markov channel model for ACM scheme in WiMAX 
    Vu Thang; Nguyen Dinh; Trinh Vu (IEEE, 2009)
    The paper derives a more accurate upper bound for BER for M-QAM than is currently used in the literature. This allows a more thorough analysis of the power adaptation to fading conditions for optimization of spectral ...
  • An FSMC Model for the ACM Scheme with Repetition Coding in Mobile WiMAX 
    Nguyen Dinh; Vu Thang; Nguyen Tuan (IEEE, 2009)
    To protect vital control information from deep fades, repetition coding is recommended in mobile WiMAX. This paper considers repetition coding as a maximum ratio combining process and proposes an expression for the coding ...
  • Scale-Domain Equalizer for Wavelet-Based ADSL 
    Nguyen Tuan; Nguyen Dinh (IEEE, 2006)
    Current opinions vary on the question of suitability of wavelet-based multi-carrier modulation (MCM) systems for communication through dispersive time invariant channels such as digital subscriber line (DSL) and wireless ...
  • Stability of bandwidth request control based on dual feedback in BWA networks 
    Nguyen Tuan; Nguyen Dinh (IEEE, 2009)
    In order for the base station to respond quickly and efficiently to the uplink bandwidth request in broadband wireless access (BWA) networks using time-division duplex (TDD), a dual feedback control algorithm has recently ...