电力线高速通信中比特交换和功率调整算法  

Bit swap and power reallocation algorithm for power-line high-speed communication systems

作　　者：赵宇明[1] 郭静波[1] 王赞基[1] 唐博进[1] 

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及大型发电设备安全控制和仿真国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第10期1645-1648,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50177016)

摘　　要：为了抑制电力线信道特性的变化对电力线高速数据通信系统造成的影响,根据电力线信道的平稳特性和已有的分配结果,讨论了适用不同优化准则的电力线高速通信比特交换算法。通过比较子信道的功率增量,交换算法能够快速进行比特交换和功率调整。根据电力线高速通信的应用条件,进一步讨论了功率谱限制条件下的交换算法。仿真分析表明,交换算法在平稳信道环境中,运算速度快且能够保证分配结果的最优性。比特交换和功率调整算法可以作为带宽优化算法的重要组成部分,应用于电力线高速数据通信之中。A high speed bit swap and power reallocation algorithm was developed to reduce the impact of variation of power-line channel characteristics on high speed power-line communication systems. The stationary characteristics of the power-line channel and existing loading date were used to develop bit swap algorithms for various optimization constraints. The bit swap algorithm rapidly swap bits and reallocate power by comparing sub-carrier power increments. The signal power spectrum limit was analyzed to extend the algorithm＇s limits. The simulation results show that the bit swap algorithm rapidly and optimally reallocates the bits and power between sub-carriers for a time stationary power-line channel. The bit swap and power reallocation algorithm can be an important part of dynamic spectrum optimizations of high speed power-line communications.

关 键 词：电力线通信 比特交换 带宽优化 

分 类 号：TM734[电气工程—电力系统及自动化]