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Multiple Frequency Offsets Cancellation Scheme Based on Alamouti Coded OFDM for Distributed Antenna Systems in Selective Fading Channel
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 Title & Authors
Multiple Frequency Offsets Cancellation Scheme Based on Alamouti Coded OFDM for Distributed Antenna Systems in Selective Fading Channel
Kim, Bong-Seok; Choi, Kwonhue;
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 Abstract
We propose a cancellation algorithm based on Alamouti coded OFDM to mitigate ICI due to Frequency Offset (FO) between distributed antennas in the frequency selective fading channel. In the cancellation algorithm, the interference signal is estimated by using the initial detection symbol and then the estimated interference signal is subtracted from the received signal. As the accuracy of initial symbol increases, ICI cancellation becomes more significant. Therefore, the accuracy of the initial detection symbols is very important in the cancellation algorithm. The proposed scheme improves the accuracy of the initial detection symbol by employing an ICI self-cancellation scheme. The proposed cancellation scheme with only one iteration achieves better performance compared to the conventional cancellation schemes with many times iterations based on the conventional Alamouti coded OFDM.
 Keywords
Alamouti;OFDM;Frequency offset;DAS;ICI cancellation;Iterative;
 Language
Korean
 Cited by
 References
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