Impact of estimation and tracking of time varying channel on performance of mobile communications
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Mobile communications, Time varying channel estimation, Kalman filter.
Abstract
This study has carried out to evaluate impact of estimation and tracking of time varying channel on communications quality in mobile systems. Channel estimation and tracking are important in many wireless communication applications. The mobile system environment can be considered sub urban area where users speed between (20-140Km/h). In order to achieve high quality, the receiver needs complex channel coefficients which can be estimated by using training symbols during less than 10% of channel coherence time. Then channel tracking can be performed by using Kalman filter which allows post estimate as well as symbols detection. The results can be compared to show that the tracking lead to high quality communication with near optimum performance as well as expected.
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