电力线通信系统中的子载波组分配

研究电力线通信系统在各种约束下的速率自适应子载波分配模型,提出一种基于层次分析法的动态子载波组分配算法。为了对比还提出以一种不含决策者偏好信息和比特功率比最大化的逐子载波分配算法。在典型电力线信道环境下还仿真以一个子载波为一组的子载波组分配算法,结果表明一子载波一组的子载波组分配算法性能最优,但其复杂度最大,而动态子载波组分配算法的性能与逐子载波分配对比算法的性能相当,且接近于一子载波一组的分配算法,复杂度大大减少。

Subcarrier-band Allocation for Power-line Communication System

A dynamic subcarrier-band allocation algorithm based on analytic hierarchy process is proposed by researching a rate adaptive subcarrier allocation model for power-line communication systems under the various restrictions.A subcarrier by subcarrier allocation algorithm without the determinist′s preferential information and with the maximal bit to power ratio is also proposed for the comparison.The proposed algorithms and the subcarrier-band algorithm with only one subcarrier are tested in typical power-line channel scenarios,and the simulation results show that the performances of subcarrier-band algorithm with only one subcarrier are best but for its maximum complication,the performances of proposed subcarrier-band dynamic allocation algorithm with lowest complication are similar to the subcarrier by subcarrier algorithm and adjacent to the sub-carrier-band algorithm with only one subcarrier.