Time and Frequency Synchronization with Channel Estimation for SC-FDMA Systems Over Time-Varying Channels


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Dogan H., Odabasioglu N., Karakaya B.

WIRELESS PERSONAL COMMUNICATIONS, cilt.96, ss.163-181, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 96 Konu: 1
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1007/s11277-017-4160-0
  • Dergi Adı: WIRELESS PERSONAL COMMUNICATIONS
  • Sayfa Sayıları: ss.163-181

Özet

The constant amplitude zero autocorrelation sequence based synchronization and its usage in the block-type channel estimation for the single carrier frequency division multiple access (SC-FDMA) systems are vulnerable to the time-varying channels. Therefore, the channel estimation errors limit the performance of SC-FDMA systems in fast fading environments and result an irreducible error floor. In this paper, cyclic prefix based maximum likelihood estimator of time/frequency synchronization with comb-type channel estimation for the SC-FDMA systems are proposed to track the channel variations. Moreover, the residual time/frequency offsets calculations are derived for SC-FDMA systems. Simulation results confirm and illustrate that the proposed receiver is capable of tracking fast fading channel parameters and improving the overall performance as compared with the conventional receiver.

The constant amplitude zero autocorrelation sequence based synchronization and its usage in the block-type channel estimation for the single carrier frequency division multiple access (SC-FDMA) systems are vulnerable to the time-varying channels. Therefore, the channel estimation errors limit the performance of SC-FDMA systems in fast fading environments and result an irreducible error floor. In this paper, cyclic prefix based maximum likelihood estimator of time/frequency synchronization with comb-type channel estimation for the SC-FDMA systems are proposed to track the channel variations. Moreover, the residual time/frequency offsets calculations are derived for SC-FDMA systems. Simulation results confirm and illustrate that the proposed receiver is capable of tracking fast fading channel parameters and improving the overall performance as compared with the conventional receiver.