Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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Institution Author: search.filters.institutionAuthor.Baştürk, İlhanSubject: search.filters.subject.Channel estimation

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  • Conference Object
    Ofdm Sistemler için Pilot Tabanlı Yinelemeli Kanal Kestirimi
    (IEEE, 2008) Baştürk, İlhan; Özbek, Berna
    In this study, pilot-based iterative channel estimation, which use virtual pilots, is proposed for OFDM systems In order to find final channel estimates, instead of averaging the group estimates, which are found by virtual pilots, it is proposed to combine them by taking into account their reliabilities that are calculated by using probability density function. Then the proposed method is compared to Expectation-Maximization (EM) algorithm with respect to performance and computational complexity. The performance results are given in terms of Bit Error Rate (BER) and Mean Squared Error (MSE). ©2008 IEEE.
  • Conference Object
    Citation - WoS: 1
    Citation - Scopus: 3
    Iterative Em-Based Channel Estimation for Stbc-Ofdm
    (Institute of Electrical and Electronics Engineers Inc., 2009) Baştürk, İlhan; Özbek, Berna
    In this paper, an iterative EM based channel estimation algorithm is studied for STBC-OFDM systems. Compared to the time domain EM based channel estimation algorithm which needs matrix inversion, a frequency domain EM based channel estimation algorithm is proposed by estimating the channel coefficients for each subcarrier. The proposed channel estimation algorithm decreased the complexity without sacrificing the performance. The time domain and proposed frequency domain EM based channel estimation algorithms are compared in terms of bit error rate (BER), mean square error (MSE) and the number of iterations used in the EM algorithm.