Browsing by Author "Nguyen, Dinh Thong"

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Browsing by Author "Nguyen, Dinh Thong"

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  • Quoc-Tuan, Nguyen; Nguyen, Dinh Thong; Cong, Lam Sinh (Hindawi Publishing Corporation, 2013)
    In modern broadband wireless access systems such as mobile worldwide interoperability for microwave access (WiMAX) and others, repetition coding is recommended for the lowest modulation level, in addition to the mandatory ...
  • Vu, Thang; Nguyen, Dinh Thong; 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 ...
  • Nguyen, Tuan; Nguyen, Dinh Thong (IEEE Computer Society, 2010)
    Dual feedback control algorithm has proved to allow the base station to respond quickly and efficiently to the uplink bandwidth request in broadband wireless access (BWA) networks [2][3]. In this algorithm the bandwidth ...
  • Trang, Chung; Nguyen, Dinh Thong; 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 ...
  • Vu, Thang; Nguyen, Dinh Thong; 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 ...
  • Nguyen, Dinh Thong; 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 ...
  • Dinh, Mai; Trang, Chung; Nguyen, Tuan; Nguyen, Dinh Thong (IEEE Computer Society, 2010)
    It is well known that exploiting spatial diversity via cooperation of many cognitive radios leads to an increase in energy detection reliability. This is because the probability that many radio channels concurrently ...
  • Van Khang, Vu; Nguyen, Dinh Thong (IEEE, 2007)
    This paper points out in an analytical way that rankdeficiency in indoor MIMO is typically due to the small size of scattering windows in the NLOS propagation path between the transmitter and the receiver.
  • Nguyen, Tuan; Nguyen, Dinh Thong (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 ...
  • Nguyen, Tuan; Nguyen, Dinh Thong (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 ...
  • Nguyen, Tuan; Nguyen, Dinh Thong (IEEE, 2005)
    The authors consider the viability of a wavelet-based multicarrier modulation (MCM) scheme as an alternative to the current FFT-based system used in an asymmetrical digital subscriber line (ADSL). Current work tends to ...