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Power Allocation and Partner Selection in Reciprocal Cooperative Networks

Janzamin, Majid | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40455 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Pakravan, Mohammad Reza
  7. Abstract:
  8. Diversity is utilized to mitigate the undesirable fading effect in wireless networks. Cooperative diversity or cooperative communication is one diversity method that is shown to reduce data transmission power consumption as well as obtaining diversity. Therefore, power allocation method has a significant impact on cooperative system performance. In this thesis, we consider reciprocal cooperation between selfish users. In reciprocal cooperation, both users act as each other’s relay. First we introduce a game theoretic-based algorithm for power allocation in a reciprocal cooperation communication. When the proposed algorithm is performed in a distributed manner between two sources, it reaches the final result in the first step. Simulation results show that nearer nodes gain more profit from cooperation. In addition, proposed solution is very close to Nash equilibrium which is a very precious achievement in scenarios considering selfish nodes. Moreover, it will be shown that algorithm result is fair and farther nodes should spend more power for cooperation. Next, we exploit the proposed power allocation algorithm and introduce a method for partner selection in reciprocal cooperative networks. This algorithm is executed in a centralized approach and its final result determines cooperative couples. Users are considered to be selfish. Based on users’ condition, the couples are determined as optimum or sub-optimum. Simulation results demonstrate that most couples are chosen optimally.
  9. Keywords:
  10. Cooperation Communication ; Power Allocation ; Portner Selection ; Game Theory ; Reciprocal Cooperation

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