標題: | 用於協調式多點收發系統之非正交預編碼的功率分配 Power Allocation for Non-orthogonal Precoded Coordinated Multi-point Systems |
作者: | 趙翊荃 蔡尚澕 Chao, Yi-Chuan Tsai, Shang-Ho 電控工程研究所 |
關鍵字: | 非正交;CoMP;BD;MRT;non-orthogonal |
公開日期: | 2017 |
摘要: | 在本論文中,我們對CoMP系統提出一套混合的預編碼方法,藉由同時使用BD與MRT兩種預編碼方法,進而降低backhaul負擔。我們針對其中兩個問題並將其列為最佳化問題,1) 在使用者傳輸量限制下最小化backhaul負擔,2) 在使用者傳輸量限制下最大化傳輸量總和。由此推得的解析解也經由Matlab的CVX來驗證相去無幾,並且能夠大幅降低運算量。模擬結果也驗證我們所提出的方案明顯降低了backhaul負擔且相較傳統方法在達成率上有著更好的效能。 We propose a mixed precoding strategy for CoMP systems, which allows that the orthogonal Block Diagonalization (BD) and the non-orthogonal Maximum Ratio Transmission (MRT) techniques can be simultaneously used for reducing network backhaul loading. We formulated the issues into two optimization problems. Namely, 1) minimizing the backhaul loading under a minimum target rate constraint and 2) maximizing the sum rate under a minimum target rate constraint. We derive closed-form solutions for these two problems and verify them by the Matlab CVX tool box. The de- rived closed-form solutions can signicantly reduce the computational time compared to the CVX. Simulation results show that the proposed precoding schemes can signicantly reduce the backhaul loading and outperform con- ventional schemes in terms of outage probability in achieving the minimum rate constraint. |
URI: | http://etd.lib.nctu.edu.tw/cdrfb3/record/nctu/#GT070460010 http://hdl.handle.net/11536/142727 |
顯示於類別: | 畢業論文 |