【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。更多还原

【Abstract】 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.更多还原