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Volume 33 Issue 4
May  2011
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Wang Lei, Xu Da-Zhuan. The Application of Gardner Algorithm to Sampling Rate Synchronization in OFDM Systems[J]. Journal of Electronics & Information Technology, 2011, 33(4): 864-868. doi: 10.3724/SP.J.1146.2010.00134
Citation: Wang Lei, Xu Da-Zhuan. The Application of Gardner Algorithm to Sampling Rate Synchronization in OFDM Systems[J]. Journal of Electronics & Information Technology, 2011, 33(4): 864-868. doi: 10.3724/SP.J.1146.2010.00134

The Application of Gardner Algorithm to Sampling Rate Synchronization in OFDM Systems

doi: 10.3724/SP.J.1146.2010.00134
  • Received Date: 2010-02-05
  • Rev Recd Date: 2011-02-28
  • Publish Date: 2011-04-19
  • Gardner bit synchronization method in single carrier is applied to OFDM system, to complete sampling rate synchronization. Gardner loop is composed of timing error estimator, loop filter and interpolation. The loop filter is replaced by linear least-square fitting which is achieved by recursion in order to reduce computational complexity. The estimation error of sampling rate can be reduced in cubic law. But there are two problems in practice when using least-square fitting. First, the sampling rate is not constant, which will change slowly by the temperature. Second, the intermediate variables will overflow in recursion. So the intermediate variables are modified periodically to limiting the time span and change the coordinate to solve the two problems.
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