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shadowing factor
相关语句
  遮蔽因子
    Inserting a random variable distance estimation error into the "distance-loss" model results in solvable equations with maximum-likelihood algorithm. The estimation error is too small to change the distribution of log-normal shadowing factor in the model.
    首先对现有的"路径—损耗"模型进行了修正,引入距离估计误差随机变量,由于其一般误差较小,不足以改变现有的模型中遮蔽因子的概率密度函数,所以遮蔽因子仍然满足正态分布.
短句来源
    Based on the indoor propagation loss model, the algorithm uses the Maximum-Likelihood (ML) method , takes advantage of an iterative method to get the distances between the user and each receiver and the corresponding estimation of the shadowing factor in the propagation loss model, and gets the location estimation.
    基于对数正态分布的室内传播损耗模型,本文利用最大似然估计算法,通过迭代估计得到用户与各个接收机之间的距离和相应的传播损耗模型中的遮蔽因子,并由此估计得到室内用户的位置。
短句来源
  “shadowing factor”译为未确定词的双语例句
    However, it is a continuous time model, and the log-normal distribution and the shadowing factor render this model less tractable for theoretical performance analysis and quantification of the channel-induced diversity and coding gains.
    该模型与测量数据吻合的比较好,但是模型中引入的多径幅度的对数正态分布和表征阴影效应的因子使得从理论角度分析系统的性能有很大的困难。 而且该模型为连续时间模型,在评估基带系统的性能时,必须按照系统的采样间隔对其进行离散化。
短句来源
    With the derived general SER formula,the influences of Multipath Intensity Profile(MIP)′s decaying factor,spatial and temporal diversity order,number of user and the shadowing factor are analyzed.
    利用推导出的平均误符号率表达式,分析了多径密度函数(M ultipath IntensityProfile-M IP)衰减因子、空时分集维数、活动用户数以及阴影衰落因子对平均误符号率性能的影响.
短句来源
    With the outage probability formula, the influences of multipath intensity profile (MIP)'s decaying factor, spatial and temporal diversity order, number of users and shadowing factor is analyzed.
    针对中断概率性能,分析了多径密度函数(MultipathIntensityProfileMIP)衰减因子、空时分集维数、活动用户数、每比特平均接收信噪比以及衰落因子对系统性能的影响。
短句来源
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  shadowing factor
The estimation error is very small; thus, it does not change the log-normal distribution of the shadowing factor in the model.
      
To improve the current extraction a copper grid, having a shadowing factor of 11%, is evaporated through a mask on the top contact.
      


Inserting a random variable distance estimation error into the "distance-loss" model results in solvable equations with maximum-likelihood algorithm. The estimation error is too small to change the distribution of log-normal shadowing factor in the model. Therefore an iterative method is introduced to reduce the influence of shadowing and the location estimation based on the received signal strength will be improved. Simulations show that this algorithm is effective.

首先对现有的"路径—损耗"模型进行了修正,引入距离估计误差随机变量,由于其一般误差较小,不足以改变现有的模型中遮蔽因子的概率密度函数,所以遮蔽因子仍然满足正态分布.然后,推导了一种迭代最大似然估计算法,通过有限次的迭代,可以将由遮蔽因子导入的误差减小到一定程度,并得到令人满意的用户位置的估计结果.模拟表明,该方法可以提供较高的精度.

Based on the indoor propagation loss model, the algorithm uses the Maximum-Likelihood (ML) method , takes advantage of an iterative method to get the distances between the user and each receiver and the corresponding estimation of the shadowing factor in the propagation loss model, and gets the location estimation. The simulation show that the algorithm can converge at the final estimation quickly and accurately.

基于对数正态分布的室内传播损耗模型,本文利用最大似然估计算法,通过迭代估计得到用户与各个接收机之间的距离和相应的传播损耗模型中的遮蔽因子,并由此估计得到室内用户的位置。仿真结果表明,本算法收敛速度快,并有较高估计精度。

A general SER performance analysis framework of Cascade Distributed Antenna System(CDAS) in CDMA system with hybrid SC/MRC diversity receiver is presented.The channel model assumes frequency-selective channel with Nakagami/lognormal composite fading statistics.With the derived general SER formula,the influences of Multipath Intensity Profile(MIP)′s decaying factor,spatial and temporal diversity order,number of user and the shadowing factor are analyzed.Numerical results show that the CDAS can effectively...

A general SER performance analysis framework of Cascade Distributed Antenna System(CDAS) in CDMA system with hybrid SC/MRC diversity receiver is presented.The channel model assumes frequency-selective channel with Nakagami/lognormal composite fading statistics.With the derived general SER formula,the influences of Multipath Intensity Profile(MIP)′s decaying factor,spatial and temporal diversity order,number of user and the shadowing factor are analyzed.Numerical results show that the CDAS can effectively combat fading,and improve the system capacity.It can also impair the impact of lognormal shadowing fading.

针对Nakagam i/lognorm al复合衰落信道,研究了层叠分布式天线系统(Cascade D istributed Anten-na System-CDAS)在CDMA网络中的平均误符号率性能.推导出了采用混合SC/MRC分集接收机的层叠分布式天线系统平均误符号率性能公式.利用推导出的平均误符号率表达式,分析了多径密度函数(M ultipath IntensityProfile-M IP)衰减因子、空时分集维数、活动用户数以及阴影衰落因子对平均误符号率性能的影响.仿真表明层叠分布式天线系统可以有效对抗衰落,提高系统容量以及削弱对数正态阴影衰落的影响.

 
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