| 感知无线电网络中考虑节点数据延时的分布式功率控制算法 |
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| 引用本文： | 孙顺乔,汪翔,倪卫明. 感知无线电网络中考虑节点数据延时的分布式功率控制算法[J]. 复旦学报(自然科学版), 2011, 0(4): 485-491 |
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| 作者姓名： | 孙顺乔 汪翔 倪卫明 |
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| 作者单位： | 复旦大学通信科学与工程系; |
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| 摘 要： | 研究感知无线电网络中分布式功率控制问题.为保证对主用户的干扰低于阈值,提出一种节点本地估计和信息交换的策略,不需要中心控制节点和辅助测量节点.优化目标是在满足数据传输延迟约束条件下最小化节点的发射功率,并证明此功率控制是凸优化问题.基于拉格朗日对偶分解原理,构造了次梯度迭代的分布式算法,并证明了分布式算法的收敛性.计算...
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| 关 键 词： | 感知无线电网络 传输延时 分布式功率控制 凸优化 次梯度 |
Distributed Power Control Algorithm Considering Node Data Delay in Cognitive Radio Networks |
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| SUN Shun-qiao,WANG Xiang,NI Wei-ming. Distributed Power Control Algorithm Considering Node Data Delay in Cognitive Radio Networks[J]. Journal of Fudan University(Natural Science), 2011, 0(4): 485-491 |
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| Authors: | SUN Shun-qiao WANG Xiang NI Wei-ming |
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| Affiliation: | SUN Shun-qiao,WANG Xiang,NI Wei-ming(Department of Communication Science and Engineering,Fudan University,Shanghai 200433,China) |
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| Abstract: | The distributed power control problem in cognitive radio network is studied.A strategy that based on each node local estimation and information exchange is proposed to keep the interference to primary user lower than pre-determined threshold without any central control nodes or assistant sensors.The optimal objective is to minimize the node transmission power under the data delay constraint and power control is proved to be a convex optimization problem.Based on Lagrange dual decomposition theory,a subgradi... |
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| Keywords: | cognitive radio network transmission delay distributed power control(DPC) convex optimization subgradient |
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