基于矩生成函数近似的双媒质协作通信功率优化分配  

Power Optimization Allocation Based on Moment Generation Function Approximation in Dual Media Cooperative Communication

作　　者：陈智雄[1] 景一方 韩东升[1] 邱丽君 田新成[3] CHEN Zhixiong;JING Yifang;HAN Dongsheng;QIU Lijun;TIAN Xincheng(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;China Electric Power Research Institute,Beijing 100192,China;State Grid Tangshan Power Corporation,Tangshan 063000,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003 [2]中国电力科学研究院有限公司,北京市100192 [3]国网唐山供电公司,河北省唐山市063000

出　　处：《电力系统自动化》2018年第23期159-167,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(61601182);河北省自然科学基金资助项目(F2017502059);中央高校科研业务费专项资金资助项目(2017MS109)~~

摘　　要：针对通用无线接入和电力线中继传输的混合通信场景,首先采用通用Nakagami分布的无线衰落和对数正态(LogN)分布的电力线衰落混合衰落模型,综合应用基于矩生成函数(MGF)方程组的Gamma分布—LogN分布近似转化、LogN变量和近似等方法,推导了系统采用译码转发协议和选择式合并之后的中断概率和误码率理论公式。其中针对MGF方程组,提出了适用于瞬时信噪比概率密度近似转化的关键参数确定方法。接着利用理论性能公式分析了混合信道衰落因子、多维脉冲噪声参数和功率分配影响系统性能的规律,并利用黄金分割等数值算法确定最佳功率分配因子。最后采用蒙特卡洛仿真,验证了理论分析的有效性与可靠性。Aim at the hybrid communication scenarios combining universal wireless access and power line relay transmission,a mixed model of universal Nakagami wireless fading and lognormal(LogN)power line fading is first used to deduce the theoretical equations of outage probability and bit error rate performance after adopting decoding and forwarding protocol and selection combination,where the approximate transformation from Gamma distribution to LogN distribution based on moment generation function(MGF)equations and the sum approximation of LogN variables are employed integratedly.For the MGF equations,an algorithm is put forward to compute the key parameters of the probability density of instantaneous signal-to-noise ratio in approximation transformation.Then the theory expressions are used to analyze the effect of hybrid channel fading factor,multi-dimensional impulse noise parameters and power allocation on the system performance.The numerical algorithms such as golden section are used to determine the optimal power allocation factor.Finally,Monte-Carlo simulation is used to verify the validity and reliability of theoretical analysis.

关 键 词：双媒质协作通信 混合衰落 脉冲噪声 功率分配 

分 类 号：TN929.5[电子电信—通信与信息系统]