Method for OFDM and OFDMA channel estimation

This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation. For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and o...

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Bibliographic Details
Main Authors LIN, DAVID W, HUNG, KUNIEN
Format Patent
LanguageChinese
English
Published 16.09.2009
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation. For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) systems, in which the simplest choice is linear inter/extra-polation. But the performance of the method depends on the accuracy of symbol timing estimate as well as the channel delay spread. The invention considers mitigating the problem by adding a linear phase factor to the polynomial inter/extra-polator, which corresponds to adding a delay (called delay shift) in the time domain.
Bibliography:Application Number: TW20080108535