基于放大转发模式的配电监测传感网的功率分配优化  

Optimization of Power Allocation of Power Distribution Monitoring Sensor Network Based on Amplify and Forward

作　　者：于宝明[1] 汤滟[1] 刘磊[1] 顾斌[1] 

机构地区：[1]南京信息职业技术学院电子信息学院,江苏南京210046

出　　处：《低压电器》2011年第20期35-39,共5页Low Voltage Apparatus

摘　　要：建立了一个基于放大转发中继模式的功率优化分配数学模型,比较了功率优化分配和均等分配两种方案下网络的单位带宽吞吐率。解算过程和结果表明,逐次二次规划算法具有优越的收敛速度和精度;在总功率不变的前提下,优化功率分配相对均等功率分配而言,能取得一定的信道容量正增益,在信道恶劣环境下表现更为明显,对电网干扰环境下的无线通信极为有利;根据香农定理,信道容量正增益可等效于一定的功率负增益,为困扰无线传感网的能耗受限问题提供了一条解决途径。A mathematical model on optimized power allocation based on amplify and forward （AF） on relay mode was built,and it was solved numerically using sequential quadratic programming（SQP） algorithm. Based on these, a comparison between tWO schemes, namely power＇ s optimized allocation and equalized allocation, was made. The results indicate that the SQP algorithm features an excellent speed and precision of convergence ,the op- timized allocation of power outperforms equalized allocation in the positive gain of channel capacity under the prem- ise that the total power keeps invariant. The positive gain in the capacity of channel can be equivalent to some nega- tive gain of power according Shannon＇ s theorem, thus the scheme proposed guides a way to the solution of the limit- ed energy consumption which often puzzles wireless sensor network.

关 键 词：配电 无线传感网 放大转发 逐次二次规划 功率分配优化 

分 类 号：TN925[电子电信—通信与信息系统]