Thorsten Petermann

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Finite-Alphabet-based blind channel estimation in OFDM systems is known to be extremely complex due to an exhaustive search to be performed over a tremendous number of channel coefficient combinations. In this paper, we present a novel blind channel estimator which dramatically reduces this number of coefficient combinations to be checked without a(More)
We investigate in this paper whether the HOS-based blind channel estimation method EVI (EigenVector approach to blind Identification) can compete with the nonblind cross-correlation-based scheme used in state-of-theart GSM receivers (Global System for Mobile comm.). For blind, non-blind, and ideal estimates of COST-2072 mobile radio channels, we give(More)
Channel estimation plays a leading role in wireless communication systems such as GSM (Global System for Mobile communications). Putting the main emphasis on investigating the application of non-blind and blind channel estimation approaches to the identification of a full rate data Traffic CHannel (TCH/F9.6), we present in this paper a new idea of an(More)
BACKGROUND The aim of this study was to evaluate the effect of a single dose of leuprolide acetate on gonadotrophin and gonadal steroid secretion in brothers of women with polycystic ovary syndrome (PCOS), in order to assess P450c17alpha activity. An oral glucose tolerance test (OGTT) and a lipid profile were also performed. METHODS Twenty-two unrelated(More)
In this paper, we present two novel blind channel estimation algorithms for OFDM systems based upon the knowledge that the modulated and transmitted data are confined to a finite alphabet set. The Minimum Impulse Length (MIL) method exploits the correlations between adjacent subcarrier coefficients caused by time limited impulse responses and shows a very(More)
Die Kanalschätzung spielt eine sehr wichtige Rolle in kohärenten Funkübertragungssystemen wie z.B. GSM (GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS). In diesem Beitrag wird ein neues Verfahren zur iterativen Kanalschätzung basierend auf den Fähigkeiten der Kanalkodierung vorgestellt. Dabei konzentriert sich die Anwendung der nichtblinden und blinden Kanalsch(More)
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