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A novel low-complexity power allocation algorithm based on the NOMA system in a low-speed environment

Digital Communications and Networks 2021年第4期7卷 580-588页

作者： Guangfu Wu Wenyi Zheng Wei Xiong Yun Li Hongcheng Zhuang Xin Tan School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China Chongqing Municipal Housing Provident Fund Administration Center Chongqing401121China Chongqing Key Laboratory of Mobile Communications Technology Chongqing University of Posts and TelecommunicationsChongqing400065China Huawei Technologies Co Ltd.Shenzhen518129China

For future wireless communication systems,Power Domain Non-Orthogonal Multiple Access(PD-NOMA)using an advanced receiver has been considered as a promising radio access technology *** allocation plays an important role in the PD-NOMA system because it considerably affects the total throughput and Geometric Mean User Throughput(GMUT)***,most existing studies have not completely accounted for the computational complexity of the power allocation process when the User Terminals(UTs)move in a slow fading channel *** resolve such problems,a power allocation method is proposed to considerably reduce the search space of a Full Search Power(FSP)allocation *** initial power reallocation coefficients will be set to start with former optimal values by the proposed Lemma before searching for optimal power reallocation coefficients based on total throughput *** size and correction granularity will be adjusted within a much narrower power search range while invalid power combinations may be reasonably discarded during the search *** simulation results show that the proposed power reallocation scheme can greatly reduce computational complexity while the total throughput and GMUT performance loss are not greater than 1.5%compared with the FSP algorithm.

关键词： NOMA Power allocation slow fading channel Low computational complexity

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Adaptive Transversal Multi-user Detector for DS/CDMA Systems

Adaptive Transversal Multi-user Detector for DS/CDMA Systems

引用

1998 International Conference on Communication Technology

作者： Pinyi Ren Shihua Zhu Xiaorong Liu Xian Jiaotong University

ISBN: (纸本)7800908275

＜正＞In this paper,by exploring the similarity between the multi-user detector and the transversal equalizer,we propose a new type of detector named adaptive transversal multi-user *** applies most achievements of equalizers to the new detector,making the design and analysis of the detector much more tractable. Analysis and simulations show that the detector can quickly converge to a small mean square error form most initial *** has a constant decision delay and enhanced performance of signal detection in the severe near-far detriments.

关键词： DS/CDMA Multi-user detection Least Square error slow fading channel

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