On Modeling and Analysis of Optimum Diversity Combining in Cooperative Relay Networks

• Author / Creator

  Suraweera, Navod D

• The cancellation of co-channel interference (CCI) is extremely vital in the nextgeneration
  wireless systems, where universal frequency reuse is commonly used to maximize the capacity. The implementation of CCI cancellation at the receivers instead of the transmitters minimizes the additional overhead associated with CCI cancellation. Optimum combining (OC) enables the cancellation of CCI in multiple-antenna
  receivers. Cooperative relaying creates a virtual antenna array, which enables the cancellation of CCI using OC in single antenna receivers.
  The cancellation of CCI in cooperative relay networks using OC is the main focus of this thesis. More specifically, 1) the modeling and the application of optimum combining for cooperative relay networks 2) carrying out the performance analyses in different system and channel models to obtain performance metrics and 3) the evaluation of the robustness and the feasibility of practical implementation of OC in cooperative relaying, are carried out. The performance of OC in decode-and-forward and amplify-and-forward relay protocols, and in opportunistic relay selection is studied. The deterministic interference model, which can be used to model conventionally planned networks, and the random interference model, which can be
  applied for fourth-generation ad hoc and heterogeneous networks, are considered in
  the performance analysis. The impact of imperfect estimations of the desired and
  interferer channels on OC in cooperative relaying is analyzed.
  Optimum combining improves the performance of cooperative relay networks
  significantly with a minimum additional overhead, which allows the capacity to be
  maximized using universal frequency reuse at each transmitter.

• Subjects / Keywords

  • Cooperative Relay
  • Optimum Combining
  • Co-channel Interference

• Graduation date

  Fall 2015

• Type of Item

  Thesis

• Degree

  Doctor of Philosophy

• DOI

  https://doi.org/10.7939/R3PV6BC6X

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.