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Estimation of Synchronization Parameters in AF Cooperative Networks
2012 IEEE International Conference on Communications (2012)
  • Ali A. Nasir
  • Hani Mehrpouyan
  • Steven D. Blostein
  • Salman Durrani
  • Rodney A. Kennedy
In cooperative networks, multiple carrier frequency offsets (MCFOs) and multiple timing offsets (MTOs) originate due to multiple distributed nodes. In this paper, algorithms for joint estimation of these parameters and channels in amplify-and-forward (AF) relaying networks are proposed. A new training model and transceiver structure at the relays for achieving synchronization throughout the network is devised. New exact closed-form expressions for the Cramér-Rao lower bounds (CRLBs) for the multiparameter estimation problem are derived. An estimation method is proposed for jointly estimating MCFOs, MTOs, and channel gains at the destination based on space-alternating generalized expectation maximization (SAGE) and compared to a computationally-intensive least squares (LS) approach. The proposed estimator’s performance is shown to be close to the CRLB at mid-to-high signal-to-noise ratio (SNR) resulting in significant cooperative performance gains in the presence of practical impairments.
  • channel estimation,
  • cooperative systems,
  • estimation,
  • relays,
  • signal to noise ratio,
  • timing
Publication Date
Publisher Statement
© 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. doi: 10.1109/ICC.2012.6363669
Citation Information
Ali A. Nasir, Hani Mehrpouyan, Steven D. Blostein, Salman Durrani, et al.. "Estimation of Synchronization Parameters in AF Cooperative Networks" 2012 IEEE International Conference on Communications (2012)
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