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Cooperative Communications Based on Jointly Network Coding and Rateless Coding Approach and Their Analysis

Mansourifard, Parisa | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41037 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Kenari, Masoumeh
  7. Abstract:
  8. In recent years, coded cooperation has been considered as one of the best methods to cope with fading and at the same time to achieve channel coding gain. On the other hand, the idea of network coding has been introduced for increasing the efficiency of cooperative networks. In addition, it has been shown that only by jointly designing of network coding and channel coding, the capacity will be achievable. Also, to adjust the rate to the channel capacity without requiring the channel state information at the transmitter, Rateless coding has been proposed. In this thesis above techniques are combined to gain their advantages and to improve system performance. To this end, first we consider a multiple-access-relay channel with two sources, one relay and one common destination in which the jointly network coding and Rateless coding is applied. The outage probability and the throughput of the proposed scheme are evaluated based on analysis and computer simulation, and the results are compared with those of the direct transmission and the conventional relaying. Then, we consider another cooperative scenario for multiple-access channel in which the users have messages with different priorities. In this scenario, each user is used as a relay for the users with higher priority and applies the jointly network coding and Rateless coding to encode its own message and their messages jointly. The outage probability and the throughput of the proposed scheme are evaluated based on analysis and computer simulation, and the results are compared with those of the direct transmission. At end, we consider a simple multiple-access-relay channel to compare the Raptor code (one type of Rateless codes) with Turbo code for fixed rates. We evaluate the bit error rates of the schemes by simulation. The results indicate that for fixed rates, Turbo code outperforms the suboptimum Raptor code
  9. Keywords:
  10. Cooperation Communication ; Network Coding ; Outage Probability ; Throughput ; Multiple Access Relay Channel (MARC) ; Rateless Coding

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