Cyclic delay diversity for mitigating intersymbol interference in OFDM systems
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United States of America Patent
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Jan 11, 2005
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app pub date -
Sep 22, 2000
filing date -
Sep 22, 2000
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Abstract
A method and/or an apparatus for mitigating intersymbol interference. In systems which employ transmission diversity when transmitting symbols which have a guard interval, the multiple versions of the transmitted symbols have the samples of the transmitted symbols shifted relative to each version transmitted. The shifted samples of the transmitted symbol are shifted from the end of the transmitted symbol into the beginning of the transmitted symbol. A last number of samples of the transmitted symbol are copied and placed in the guard interval which precedes the symbol. The guard interval and the symbol are transmitted to a receiver.
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