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Browsing Fakülteler by Journal "2009 IEEE 17th Signal Processing and Communications Applications Conference"

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    Linear Combination of Pulses for Coexistence in the Ieee 802.15.4a Standard
    (IEEE, 2009) Erküçük, Serhat; Kaleli, Burç Arslan; Electrical-Electronics Engineering; 05. Faculty of Engineering and Natural Sciences; 01. Kadir Has University
    The low data rate accurate location ranging Wireless Personal Area Network zWPAN standard IEEE which is based on ultra wideband zUWBg impulse radios suggests using linear combination of pulses to reduce interference to coexisting primary systems. In this paper we consider possible implementations of linear combination of pulses as suggested in the standard and study the generated notches in the resulting code spectrum. Using the zy transform approach we show that the number of these notches is limited and the notch locations are not flexible due to the limited number of pulses allowed by the standard. We also make some suggestions for increasing the number of notches at desired frequencies.
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    A Simple Iterative Equalizer for Space Time Coded Multiple Antenna Systems
    (IEEE, 2009) Güçlüoğlu, Tansal; 01. Kadir Has University
    In this paperg a simple low complexity iterative receiver for spacetime coded zSTCg transmission is proposed and the pen formance over frequencyyselective fast and quasistatic fading channels is investigatedF Simulation results show that the pery formance of the proposed structure improves with each iteraytionF Considering the practically prohibitive complexity of opytimal equalizersg the proposed iterative receiver can be more desirable in wireless systems with large number of antennasg big constellation sizes and with lenghty multipathsF