| 摘要: |
| 针对多信道认知用户能量效率问题，提出认知用户能量效率优化模型，进而优化传输功率和感知帧长。首先，多信道认知用户基于多带宽联合能量检测方案，在一定传输功率和干扰功率限制下，建立了以单位数据能耗为目标的最优化问题；其次，通过非线性分式规划的对偶优化将目标函数转换为内点法求解形式；然后，结合内点法和二分法给出算法流程，进而配置最优功率和感知时间。仿真结果表明，对应不同通信环境采用该优化方法都能通过配置最优功率和感知时间达到能量效率最优。 |
| 关键词: 认知无线电 能量效率 功率分配 非线性分式规划 |
| DOI： |
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| 基金项目: |
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| Optimal power allocation of energy efficiency for multi-channel cognitive users |
| JIANG Zhi,SHI Zhi-ping |
| () |
| Abstract: |
| For the energy efficiency problem of cognitive user with multi-channel,the energy efficiency optimization model is proposed and transmission power and perception time are optimized. Firstly,based on the multi-bandwidth joint energy detection scheme,the multi-channel cognitive user establishes the optimization problem for the target of energy consumption per unit data under certain transmission power and interference power limits. Secondly,the objective function is converted to the form which can be solved by the interior-point method through the dual optimization of the non-linear fractional programming. Thirdly,the algorithm is given by the combination of the interior-point method and the binary search method,and then the optimal power and perception time can be configured. Simulation results show that the proposed optimization method is able to achieve energy efficiency through the optimal configurations of transmission power and perception time corresponding to different communication environment. |
| Key words: cognitive radio energy efficiency power allocation nonlinear fractional programming |
《电讯技术》编辑部 