考虑功率谱限制的电力线通信比特分配算法  

A Novel Bit-loading Algorithm for Energy Spectrum Limited Power-line Communication Systems

作　　者：赵宇明[1] 王赞基[1] 郭静波[1] 于歆杰[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京市海淀区100084

出　　处：《中国电机工程学报》2006年第5期143-148,共6页Proceedings of the CSEE

基　　金：国家自然科学基金资助项目(50177016)。~~

摘　　要：为了减小电力线通信的电磁干扰,提高通信系统的服务质量,提出一种功率谱限制条件下的比特分配算法。该算法将复杂的非线性优化问题根据不同的优化约束条件,分解为三个求解阶段。在分析最优分配条件的基础上,利用贪婪法原理设计分配算法,从而降低了算法的运算量。为了进一步提高算法的运算速度,在分析比特分配损失上限的基础上,提出一种快速的次优分配算法。相比于已有算法,该算法在保证系统通信性能的同时,提高了运算速度。在典型电力线信道环境下的仿真分析表明,该算法适合于功率谱限制条件下的高速电力线通信。For debasing the electromagnetic interference （EMI） level of power-line communication systems and improving the quality of services, a novel bit-loading algorithm is presented for energy spectrum limited power-line communication （PLC） systems. The algorithm decomposes the complex non-linear optimal problem into three courses, according to the different constraints. On the basis of the optimal bit-loading conditions, the algorithm is designed by the greedy method, and the running time of algorithm is decreased. In order to further speed the algorithm, a rapid sub-optimal loading algorithm is also presented based on analyzing the bit loss superior limit of the method. The algorithm is tested in the typical power line channel environment, and the simulation results indicate that the algorithm is suitable to apply in the energy spectrum limited PLC systems.

关 键 词：比特分配 功率谱限制 电力线通信 

分 类 号：TM734[电气工程—电力系统及自动化]