基于非正交多址接入中繼通信系統(tǒng)的功率優(yōu)化
doi: 10.11999/JEIT180842
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梧州學院廣西高校圖像處理與智能信息系統(tǒng)重點實驗室? ?梧州? ?543002
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仲愷農(nóng)業(yè)工程學院信息科學與技術學院? ?廣州? ?510225
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95795部隊教研部裝備維修教研室? ?桂林? ?541003
基金項目: 國家自然科學基金(61501531)；梧州學院2012校級科研項目(2012C001)
Power Allocation Optimization of Cooperative Relaying Systems Using Non-orthogonal Multiple Access
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Guangxi Colleges and Universities Key Laboratory of Image Processing and Intelligent Information System, Wuzhou University, Wuzhou 543002, China
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College of Information Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
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Department of Equipment Maintenance of 95795 Troop of the PLA, Guilin 541003, China
Funds: The National Natural Science Foundation of China (61501531), The Scientific Research Project of Wuzhou University 2012 (2012C001)
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摘要: 針對基于非正交多址接入(NOMA)技術的中繼通信系統(tǒng)，在兼顧系統(tǒng)性能與計算復雜度的基礎上，該文提出一種結合統(tǒng)計信道信息(S-CSI)和瞬時信道信息(I-CSI)的混合功率分配策略(H-PAS)來有效實現(xiàn)上述折中。仿真結果表明，NOMA方案在H-PAS策略下，一方面比單純利用S-CSI時的傳統(tǒng)正交多址接入技術具有更高的頻譜效率；另一方面在和速率差別不大的情況下，又比單純利用I-CSI時的NOMA方案具有更低的信令開銷和計算復雜度。Abstract: A novel scheme termed Hybrid Power Allocation Strategy (H-PAS), which is integrated with Statistical Channel State Information (S-CSI) and Instantaneous Channel State Information (I-CSI), is proposed for Non-Orthogonal Multiple Access (NOMA) based on cooperative relaying systems to achieve a better performance-complexity tradeoff. Simulation results demonstrate that, with the proposed H-PAS, on the one hand, NOMA shows distinct advantage on the sum-rate compared with conventional orthogonal multiple access techniques in which only the knowledge of S-CSI is available; On the other hand, NOMA reduces the signaling overhead and computational complexity at the expense of marginal sum rate degradation when compared with the cases in which only the knowledge of I-CSI is available for it.
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Key words:
- Non-Orthogonal Multiple Access (NOMA) /
- Sum-rate /
- Power Allocation (PA)
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