【摘 要】
：
In this paper,a power allocation to maximize tradeoff between spectrum efficiency (SE) and energy efficiency (EE) is considered for the downlink non-orthogonal multiple access (NOMA) system with arbitrarily clusters and arbitrarily users,where the subcarr
【机 构】
：
School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 4540
论文部分内容阅读
In this paper,a power allocation to maximize tradeoff between spectrum efficiency (SE) and energy efficiency (EE) is considered for the downlink non-orthogonal multiple access (NOMA) system with arbitrarily clusters and arbitrarily users,where the subcarriers of clusters are mutually orthogonal to each other.Specifically,an optimization problem of maximizing SE-EE tradeoff is formulated by optimizing power allocation among users under the constraints of user rate requirements.Then,the optimization problem is decomposed into a group of subproblems with the aim of maximizing SE-EE tradeoff for each cluster,which is solved by using bisection method and monotonicity of function.Finally,the power allocation optimization problem among users is transformed into that between clusters,and a two steps inter-cluster power allocation algorithm is developed to solve this problem.Simulation results show that SE-EE tradeoff of the proposed scheme is better than that of the existing schemes.
其他文献
In recent years,with the development of smart devices,mobile users can use them to sense the environment.In order to improve the data quality and achieve maximum profits,incentive mechanism is needed to motivate users to participate.In this paper,reputati
In the traditional method,the software quality is measured by various metrics of the software,such as decoupling level (DL),which can be used to predict software defect.However,DL,which treats all the files equally,has not taken file importance into consi
As a special type of distributed denial of service (DDoS) attacks,the low-rate DDoS (LDDoS) attacks have characteristics of low average rate and strong concealment,thus,it is hard to detect such attacks by traditional approaches.Through signal analysis,a
Lithium-ion batteries are the main power supply equipment in many fields due to their advantages of no memory,high energy density,long cycle life and no pollution to the environment.Accurate prediction for the remaining useful life (RUL) of lithium-ion ba
To solve the problem of security and efficiency of anonymous authentication in the vehicle Ad-hoc network (VANET),a conditional privacy protection authentication scheme for vehicular networks is proposed based on bilinear pairings.In this scheme,the tampe
While solving unimodal function problems,conventional meta-heuristic algorithms often suffer from low accuracy and slow convergence.Therefore,in this paper,a novel meta-heuristic optimization algorithm,named protonelectron swarm (PES),is proposed based on
Network traffic classification,which matches network traffic for a specific class of different granularities,plays a vital role in the domain of network administration and cyber security.With the rapid development of network communication techniques,more
The bionics-based swarm intelligence optimization algorithm is a typical natural heuristic algorithm whose goal is to find the global optimal solution of the optimization problem.It simulates the group behavior of various animals and uses the information
A hybrid model for broadband multiple-input multiple-output (MIMO) relay-aided indoor power line communications (PLC) system was proposed in this paper.The proposed model combines the top-down and bottom-up approaches and extends to a two-hop relay-aided
In order to improve the learning speed and reduce computational complexity of twin support vector hypersphere (TSVH),this paper presents a smoothed twin support vector hypersphere (STSVH) based on the smoothing technique.STSVH can generate two hypersphere