单相配电网多用户通信中的频谱优化

提高配电网信道利用率、改善网络服务质量是配电网多用户通信系统的重要目标。讨论了在单相电力线条件下实现下行广播信道多用户频谱优化的方案，以及电力线多用户频谱优化问题的数学模型。给出了解决信号功率谱限制条件下的多用户频谱优化快速算法。在典型电力线信道环境下，比较了单用户和多用户传输性能。仿真结果表明，利用频谱优化的多用户传输能明显提高通信传输速率，对提高配电网通信性能具有重要的实际意义。

Spectrum Optimization of Multi-user Communications over Single-phase Power Distribution Networks

The key objective for multi-user communications over a power distribution network is to improve the utilization ratio of the communication channel and enhance the service quality. A multi-user spectrum optimization scheme of the downlink broadcast channel in the single-phase power-line environment is discussed. First, a mathematical model for the power-line spectrum optimization is presented and a rapid algorithm for solving the optimization problem under the signal power transmission limitation is given. Comparisons between the single user and multi-user transmission schemes are made in the typical power-line channel environment. The simulation results show that the spectrum optimization for the multi user transmission scheme can remarkably enhance the transmission rate and is of importance in improving the communication performance over power distribution networks.