Time-variant channel estimation using discrete prolate spheroidal sequences

@article{Zemen2005TimevariantCE,
  title={Time-variant channel estimation using discrete prolate spheroidal sequences},
  author={Thomas Zemen and Christoph F. Mecklenbr{\"a}uker},
  journal={IEEE Transactions on Signal Processing},
  year={2005},
  volume={53},
  pages={3597-3607}
}
We propose and analyze a low-complexity channel estimator for a multiuser multicarrier code division multiple access (MC-CDMA) downlink in a time-variant frequency-selective channel. MC-CDMA is based on orthogonal frequency division multiplexing (OFDM). The time-variant channel is estimated individually for every flat-fading subcarrier, assuming small intercarrier interference. The temporal variation of every subcarrier over the duration of a data block is upper bounded by the Doppler bandwidth… 
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