Title page for etd-0601113-174052


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URN etd-0601113-174052
Author Lei-chieh Tseng
Author's Email Address No Public.
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Department Communications Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Channel Estimation for Robust Cooperative Communication Systems
Date of Defense 2013-06-07
Page Count 35
Keyword
  • least square estimation
  • amplify-and-forward
  • mean square error
  • misbehaving
  • selfish-relay
  • likelihood ratio
  • Abstract In the cooperative communication systems, in order to achieve the same spatial diversity gains in multiple input multiple output, different users will share their antennas to transmit their signals through the relay to the destination. In this thesis, we investigate the problem of channel estimation in the amplify-and-forward cooperative communication systems, in which the information is received and detected at the destination. The existing studies almost assumed that the relays normally behave, and thus, the destination can receive complete and correct information from relays. However, in real situation, the relays may not normally participate, and the misbehavior will affect the performance of channel estimation. In order to solve this problem, this thesis proposes a robust channel estimation method for applying in a cooperative communication system with a direct transmission path. In the proposed method, when performing channel estimation of the source-relay-destination link, the destination will use additional information from the direct path. Specifically, the destination will fuse the symbols received from both the relay and direct paths using likelihood ratio combining rule, after which the fused symbols will be used for channel estimation of the source-relay-destination link. The simulation results conducted in this thesis show that the proposed method is indeed able to achieve the robust channel estimation.
    Advisory Committee
  • Chao-Tang Yu - chair
  • Fan-Shuo Tseng - co-chair
  • Chao-Kai Wen - co-chair
  • Wan-Jen Huang - co-chair
  • Tsang-Yi Wang - advisor
  • Files
  • etd-0601113-174052.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-07-02

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