Diversity and Error Probability Analysis and Determining the Effect of Non-Ideal Phase Estimation in Amplify-and-Forward and Beamforming Techniques

Safavi, Ebrahim | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40325 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Hossein Khalaj, Babak
  7. Abstract:
  8. In this study we investigate the performance of amplify-and-forward (AF) and beamforming schemes in wireless networks. In our study we consider a general cooperative network consisting one transmit-receive pair and an arbitrary number of relays in which each relay has a separate power constraint. A two-step master-slave protocol is deployed in which at the first stage, relays listen to the transmitter and at the second stage, relays forward the recently received signal coherently. Main contributions of this dissertation are providing the exact closed-form of bit error rate analysis in the case of general AF networks, providing an integral-form upper bound of error probability of network beamforming with fixed complexity for an arbitrary number of relays, presenting a signal to noise equivalent term in the case of AF distributed network and providing the asymptotic analysis of diversity and outage capacity of general AF networks. Finally, considering the effect of imperfect synchronization and error of channel phase estimation, this thesis introduces a network beamforming scheme to minimize the mean square error at the receive side.

  9. Keywords:
  10. Diversity Theory ; Amplify-and-Forward ; Beamforming ; Minimum Mean Square Error Filters ; Outage Capacity ; Distributed Signal to Noise ; Error Probability

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