- 學位論文
Blind Maximum-Likelihood Detection of Distributed Orthogonal Space-time Coding for Cooperative Communications
合作式通訊下使用分散式正交空時編碼之盲蔽最大概似檢測器
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摘要
In the thesis, we consider the blind maximum-likelihood detection problem for distributed space-time block coded cooperative communication systems. The randomized space-time coding strategy proposed by Mergen & Scalione [8] is applied in the relay network, and the efficient semidefinite relaxation (SDR) based blind ML detector [13] is used in the destination receiver. Applying the blind detection techniques to the environment of distributed cooperative communications not only overcomes the fast fading channel effects but also provides robustness against the effective channel variations due to the changing in network topology (i.e., any termination of the collaborated relays). In the system, the source node transmits the information data to the destination receiver via a group of relays. By using the so-called nonintersecting subspace orthogonal space-time block codes (NIS-OSTBCs), the unique data identifiability can be guaranteed under the blind detection scenario. Besides, we proved that the blind ML detector obtain the maximum transmit diversity gain at the destination receiver. The final simulation results also demonstrate that the proposed system yields promising bit error performance. Extension of the proposed blind ML receiver to other distributed space-time coding strate- gies are also investigated in the remaining part of the thesis.
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延伸閱讀
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- Cheng, Y. T. (2008). 利用多天線系統積極干擾消除合併使用信號到達方向估測方法達成頻帶分享的目的 [master's thesis, National Tsing Hua University]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0016-2002201315050606
- 黃則維（2009）。在全光分裂節點的光波分割多工網路上群播網路疏導的權重集合覆蓋演算法〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-2705201013403392
- Huang, S. S. (2012). 在正交分頻多工系統下利用重覆使用重調接收區塊之盲通道估測與盲區塊同步 [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2012.02102