LUO Wu, LIU An, LIANG Qinglin. Three-Step Carrier Frequency O®set EstimationAlgorithm for Burst-Mode Communications[J]. Chinese Journal of Electronics, 2010, 19(1): 165-169.
Citation: LUO Wu, LIU An, LIANG Qinglin. Three-Step Carrier Frequency O®set EstimationAlgorithm for Burst-Mode Communications[J]. Chinese Journal of Electronics, 2010, 19(1): 165-169.

Three-Step Carrier Frequency O®set EstimationAlgorithm for Burst-Mode Communications

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-01-05
  • A data-aided frequency o®set estimation
    algorithm suited for burst-mode communications is de-
    scribed and analyzed. The proposed algorithm is based on
    a Pilot symbol assisted modulation (PSAM) frame struc-
    ture, which consists of regularly spaced pilot symbols and
    a group of consecutive pilot symbols embedded in. Firstly,
    an initial estimate based on consecutive pilot symbols is
    generated for reducing the phase ambiguity. Secondly,
    based on both spaced and consecutive pilot symbols, ¯ne
    preliminary estimates are generated to improve estima-
    tion accuracy. Lastly, the ¯nal estimate is obtained by
    combining the ¯ne preliminary estimates with the initial.
    This three-step algorithm is shown to provide high estima-
    tion accuracy close to those of FFT-based algorithm at low
    Signal-to-noise ratio (SNR). In addition, it is suitable for
    high carrier frequency o®set cases.
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