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Browsing by Author "Ali Al-Isawi, Ahmed Sami"

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    Master Thesis
    Effects of channel estimation on turbo equalizer performance
    (2014) Ali Al-Isawi, Ahmed Sami
    Equalizer design is an important concept for the wireless communication systems suffering from multipath effects such as ISI. Turbo equalizers are one of the most powerful equalizers introduced several decades ago. For the equalizers to be efficient in removing ISI reliable channel estimation is essential. In this thesis the performance of turbo equalizers for blind and non-blind channel estimators is inspected. For blind channel estimation per-survivor processing with least mean square method is employed. For non-blind channel estimation training sequences are used for channel estimation. An improved channel estimation approach for non-blind technique was suggested and via simulation results, it was seen that the proposed method shows better performance in turbo equalizer than the classical blind and nonblind channel estimation methods do.