Title page for ETD etd-10282005-154037

Type of Document Master's Thesis
Author Goparaju, Anil Kumar
Author's Email Address anil.goparaju@gmail.com
URN etd-10282005-154037
Title Superposition Coding Based Co-Operative Diversity Schemes
Degree Master of Science (M.S.)
Department Electrical & Computer Engineering
Advisory Committee
Advisor Name Title
Shuangqing Wei Committee Chair
Guoxiang Gu Committee Member
Xue-Bin Liang Committee Member
  • multi-rates
  • relay channels
  • co-operative diversity
  • superposition coding
  • multi-access channels
  • broadcast channels
Date of Defense 2005-10-13
Availability unrestricted
With a prefixed decoding order at receiver end, superposition coding approach intended for degraded broadcast channels was proposed to improve the average throughput in a point-to-point wireless channel. In this thesis, we first rigorously show the optimal decoding strategy when two Gaussian codebooks are superposed together to send source information to its receiver. Our results rigorously prove the optimality of performing successive interference cancellation at receiver end. Decoding failure at relays imposes a bottle neck to improving overall throughput in relay channels with decode-and-forward relaying strategy. We then extend this framework for a single link to relay channels to optimize the overall throughput using superposition coding and joint decoding at transmitters and receivers, respectively. Numerical results reveal considerable gains of our proposed schemes compared against traditional approach.
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