Pilot-based channel estimation for OFDM systems by tracking the delay-subspace

  title={Pilot-based channel estimation for OFDM systems by tracking the delay-subspace},
  author={Osvaldo Simeone and Yeheskel Bar-Ness and Umberto Spagnolini},
  journal={IEEE Transactions on Wireless Communications},
In orthogonal frequency division multiplexing (OFDM) systems over fast-varying fading channels, channel estimation and tracking is generally carried out by transmitting known pilot symbols in given positions of the frequency-time grid. The traditional approach consists of two steps. First, the least-squares (LS) estimate is obtained over the pilot subcarriers. Then, this preliminary estimate is interpolated/smoothed over the entire frequency-time grid. In this paper, we propose to add an… CONTINUE READING
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