电力线通信系统中基于动态规划的自适应资源分配

Adaptive Resource Allocation Based on Dynamic Programming for Power-line Communication Systems

分析了电力线通信OFDM系统在多种约束下,多用户多业务在多子载波上自适应的比特和功率分配模型,提出了一种新的基于动态规划的速率和功率自适应相结合的动态资源分配算法,其先给实时用户分配资源以满足固定速率下总功率最小,再利用剩余功率和未用子载波给非实时用户分配资源以满足最小速率下总速率最大.在典型电力线信道环境下的仿真结果表明,该算法的性能优于已有的多用户资源分配优化算法,且其能更好的满足电力线通信系统中多用户资源分配的多目标要求.

The adaptive bit and power allocation model for multiuser and multiserver in power - line communication OFDM systems is analyzed with the multifarious restrictions. A novel resource dynamic allocation algorithm with rate and power adaptation based on dynamic programming is proposed, which firstly assigns resource for every real time user so as to satisfy their fixed rates and minimize the total used power, then assigns the remainder power and non - used subcarriers for every non - real time user so as to satisfy their minimal rates and then maximize the total assigned bit number. The algorithm is tested in the typical power-line channel environment and the simulation results indicate that the algorithm has the better performances than the known multiuser resource optimization allocation algorithms and it realizes better the multiple aims of multiuser resource allocation for power -line communication systems.