Elektrik - Elektronik Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12469/47

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Browsing Elektrik - Elektronik Mühendisliği Bölümü Koleksiyonu by Journal "2010 IEEE 18th Signal Processing and Communications Applications Conference"

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    Effects Of Channel Models And Optional Data Rates On The Ieee 802.15.4a System Performance [kanal Modellerinin ve Seçime Bağli Veri Hızlarının Ieee 802.15.4a Sistem Başarımına Etkileri]
    (2010) Findikli, Çağlar; Erküçük, Serhat
    The wireless personal area network standard IEEE 802.15.4a uses ultra wideband impulse radios (UWB-IRs) for precise ranging and location and as well as for communications at low data rates (about 1 Mb/s). In addition to low data rates there are optional data rates defined in the standard that can support up to 27 Mb/s. In this paper the IEEE 802.15.4a system performance is studied for optional data rates in addition to considering the effect of channel models at the mandatory data rate. For the considered channel models system performances are evaluated for different numbers of Rake fingers and the error correction capability of channel encoding is tested at various data rates. The results of this study are important for the implementation of the IEEE 802.15.4a standard. ©2010 IEEE.
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    Joint Phase Noise Estimation And Source Detection [ortak Faz Gürültüsü Kestirimi ve Kaynak Sezimlemesi]
    (2010) Kaleli, Burç Arslan; Şenol, Habib; Panayırcı, Erdal
    Rapidly time-varying and random disturbing effects on the phase of a signal waveform are known as phase noise. In this paper we consider the problem of joint detection of continuous-valued information source output and estimation of a phase noise by using expectation maximization (EM) algorithm. In order to estimate phase noise initial phase noise values are determined by cubic interpolation that utilizes pilot symbols. Computer simulations are performed for the proposed algorithm and the average mean square error (MSE) - signal to noise ratio (SNR) performance of source detector and phase noise estimator is presented for each iteration of the algorithm. Moreover average MSE - pilot spacing performance curves of phase noise estimator are given for various SNR values. ©2010 IEEE.