Channel estimation for OFDM systems with transmitter diversity
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United States of America Patent
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Oct 29, 2002
Grant Date -
N/A
app pub date -
Dec 18, 1998
filing date -
Dec 18, 1998
priority date (Note) -
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Abstract
In a receiver that includes a plurality of receiving antennas that supply signals to associated OFDM receiving modules, and the receiving modules provide signals that are applied to a detector, channel parameters that are needed for proper detection are estimated during normal operation, in addition to an initial estimate based on a known training sequence. In computing the channel impulse response estimates between the signal received at that receiving antenna and the various transmitting antennas, an nK.sub.0.times.nK.sub.0 matrix of terms (q.sub.xy [l]) is developed. The inverse of the matrix is then computed, and the computed matrix inverse is multiplied by a vector of terms (p.sub.i [l]), to obtain a vector of nK.sub.0 -sample channel impulse response estimates.
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