配电网多用户通信中的动态频谱管理

充分利用配电网的自身潜在资源，合理优化利用配电网信道的特性使配电网通信系统的整体性能达到最优是提高配电网多用，、通信系统性能的有效途径。该文定义了间时利用配电网三相电路进行通信的典型多用户矢量信道-MA、BC和IC信道。给出了矢量信道的描述模型和将其化为标量信道的方法。给出了一种以平均比特率之和最人为优化目标的矢量信道动态频谱优化分配算法。基于信道测量的归一化模型，应用该算法计算了MA、BC信道采用OFDM通信时的比特率和输入功率分配。利用三相电力线同时传输多用户信号的思想和矢量信道动态频谱分配算法为配电网多用户通信提供了一种新的解决方案。

DYNAMIC SPECTRUM MANAGEMENT OF MULTI-USER COMMUNICATIONS OVER POWER DISTRIBUTION NETWORKS

It is an effective approach to enhance theperformances of multi-user communication systems overpower distribution networks if the potential resources of thenetwork are fully utilized and the characteristics of the channel are optimized. We firstly define the typical multi-user communications over the three-phased power distributionnetworks-Multi-access (MA), Broadcast (BC) and Interference (IC) channels. Then the vector channel models as well as thedecomposing vector channel into the scalar channel are described. A novel algorithm to calculate the optimaldistribution of input power and bit rate for the vector channel is presented in which the optimal destination is set to get themaximum bit-sum rate of every scalar channel. Based on thenormalized measurement channel model, the bit rate and input power distribution of MA and BC are calculated using thealgorithm, the results show that multi-user communicationutilizing the three-phase power lines and the vector dynamicspectrum management provide a new solution to the powerdistribution network communications.