The channel estimation technique employs a set of pilot tones to determine
channel state information. Because some of the pilot tones contained in
the OFDM symbols may be missing after transmission, the disclosed
technique employs a set of known pilot tones to compute an estimate of
the channel impulse response, which may exhibit a level of distortion.
Non-zero terms of the estimated channel impulse response that fall
outside of a prescribed time window are regarded as artifacts of a set of
missing or unknown pilot tones. Information relating to the known pilot
tones and the artifacts of the unknown pilot tones are employed for
mathematically reconstructing and deriving values of the unknown tones.
Then, the values of the known pilot tones and the derived values of the
unknown pilot tones are employed to recompute the channel impulse
response, thereby obtaining the channel estimate with a reduced level of
distortion.