电力线载波通信中减小PAPR的预编码方法  

Precoding method for PLC system of reducing PAPR

作　　者：胡博 宫庆申 赵宇东 康丽雁 

机构地区：[1]辽宁省供电公司,辽宁沈阳110000

出　　处：《电力系统保护与控制》2014年第16期108-111,共4页Power System Protection and Control

摘　　要：为了提高电力线载波通信的可靠性和有效性,提出一种在发送设备端进行的信号处理方法,即相位调整预编码方法。利用了发送多个载波信号相位改变的不同,可以改变多个载波信号叠加功率和,从而减少电力线载波通信的峰均比。分析了峰均比形成的原因,提出了以最小化发送功率为目标函数,求解每个载波发送相位的优化问题。仿真结果表明,该预编码方法能够有效抑制电力线载波通信中过高的峰均比问题,在不增加复杂度的前提下,有效提高了通信的可靠性,证明了该方法的正确性和有效性。In order to improve the reliability and effectiveness of the power line carrier communication, this paper proposes a signal processing method conducted at sending device terminal, i.e. phase adjustment precoding method. By using that the phase change of sending multiple carrier signal is different, it can change the superposition power of multiple carrier signal, thus reduce the peak-to-average ratio （PAR） of power line carrier communication. It analyzes the causes of the formation of PAR, and puts forward an optimization problem to solve each carrier sending phase by minimizing sending power as the objective function. Simulation results show that the precoding method can effectively restrain the high PAR problem of power line carrier communication and improve the reliability of the communication without any increase of complexity, which proves the correctness and effectiveness of the proposed method.

关 键 词：电力线载波 相位调整 预编码 峰均比 

分 类 号：TN913.6[电子电信—通信与信息系统]