在傳統感知無線電網路中，借由主要使用者和次要使用者合作來增加頻譜使用的效率。在本篇論文中，主要使用者接收端因配備能量採集裝置，除了可以增加頻譜使用效率外，主要使用者還可以採集能量，也就是充電。由於有各種感知無線電網路架構，於交織模式中，吾人採用搭配時間切換能量採集裝置，設計次要使用者傳送端之預編碼以及時間切換因子。於覆蓋模式內，吾人採用功率分離能量採集裝置，此架構中，使用者傳送端利用放大轉發轉傳主要使用者的訊號，同時也傳送自己的訊號，因此我們設計主要使用者和次要使用者傳送端之預編碼以及功率分離因子。兩個系統的最佳化設計皆非凸優化。因此，為了簡化設計問題，我們首先找出預編碼之最佳結構，簡化設計變數量與等效問題成半定規劃。由模擬的結果可以顯示出，由於功率分離可以更靈活地調整能量採集和訊號解調的比例，功率分離的效能比時間切換還要好。

In the traditional cognitive radio networks (CRNs), the primary users (PU) and the secondary users (SU) cooperate to explore the spectrum more efficiency. In this paper, we further apply an energy harvest (EH) devise at the primary receiver (PR) in CRNs, which creates new strategy to efficiently utilize the spectrum for information delivering and energy harvested. Since the PU and SU can coexist in many structures and each structure has its own limitation, we adopt the time-splitting EH devise for the interweave CNRs and use the power-splitting EH devise for the overlay CRNs. In the interweave CRNs, we jointly design the beamformer at the secondary transmitter (ST) and the time-splitting factor. In the overlay CRNs, the ST can help PU delivering its signals by amplify-and-forward (AF) protocol, and meanwhile SU transmits its own signals. Thus, we jointly devise the precoders for the PU and SU at the ST and the power-splitting factor. In each design, the optimization is originally formulated as non-convex formulation. We then derive the optimum precoding structure to facilitate the optimization process. The resultant optimization can then be equivalently solved with semidefinite relaxation (SDR). Numerical results show the promising performance resulted from the information and the energy cooperation strategy. The results also exhibit the overlay CRNs outperform the interweave CRNs since the power splitting is more flexible in transferring the information and the harvested energy.

論文審定書……………………………………………………………..………………..i
誌謝……..………………..………………………………………….…………...……..ii
中文摘要………………………………………………………………..…….………...iii
英文摘要…………………………………………………………………….……….....iv
目錄……………………………………………………………….……………………..v
圖次……………………………………………………………….…………………….vi
第1章 序言……………………………………………………………………………..1
第2章 系統模型………………………………………………………..……………....7
第2.1節 交織式感知無線電網路與具能量採集之主要使用者接收機……...……7
第2.2節 覆蓋式感知無線電網路與具能量採集之主要使用者接收機……...……9
第3章 交織模式搭配能量採集接收端之傳接收設計………………………………14
第3.1節 最佳化問題描述………………………………………………………….14
第3.2節 交織模式感知無線電設計………………………………………………15
第4章 覆蓋模式搭配能量採集接收端之傳接收設計………………………………17
第4.1節 最佳化問題描述………………………………………………………….17
第4.2節 覆蓋模式感知無線電設計……………………….………………………18
第5章 系統模擬及探討………………………………………………………………22
第6章 結論與未來展望………………………………………………………………28
參考文獻……………………………………………………………………………….29
附錄A…………………………………………………………………………………..32
附錄B…………………………………………………………………………………..34
附錄C…………………………………………………………………………………..37
附錄D…………………………………………………………………………………..39
附錄E…………………………………………………………………………………..41

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