Browsing by Subject "Input sequence estimation"
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Item Open Access Input sequence estimation and blind channel identification in HF communication(IEEE, 2000) Khames, Mariam; Miled, B. H.; Arıkan, OrhanA new algorithm is proposed for reliable communication over HF tropospheric links in the presence of rapid channel variations. In the proposed approach, using fractionally space channel outputs, sequential estimation of channel characteristics and input sequence is performed by utilizing subspace tracking and Kalman filtering. Simulation based comparisons with the existing algorithms show that the proposed approaches significantly improve the performance of the communication system and enable us to utilize HF communication in bad conditions.Item Unknown Theoretical investigation on exact blind channel and input sequence estimation(IEEE, Piscataway, NJ, United States, 1999) Özdemir, A. K.; Arıkan, OrhanRecent work on fractionally spaced blind equalizers have shown that it is possible to exactly identify the channel and its input sequence from the noise-free channel outputs. However, the obtained results are based on a set of over-restrictive constrainst on the channel. In this paper it is shown that the exact identification can be achieved in a broader class of channels.