Pilot-aided channel estimation for OFDM in wireless systems
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United States of America Patent
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Nov 6, 2007
Grant Date -
May 6, 2004
app pub date -
Oct 16, 2003
filing date -
Dec 31, 1998
priority date (Note) -
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Abstract
A method and apparatus for pilot-symbol aided channel estimation in a wireless digital communication system which transmits packets of N OFDM data blocks, each data block comprising a set of K orthogonal carrier frequencies. At the transmitter, pilot symbols are inserted into each data packet at known positions so as to occupy predetermined positions in the time-frequency space. At the receiver, the received signal is subject to a two-dimensional inverse Fourier transform, two-dimensional filtering and a two-dimensional Fourier transform to recover the pilot symbols so as to estimate the channel response.
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