宽带电力线载波MIMO系统干扰消除预编码方法  

Precoding method for eliminating interference of broadband PLC MIMO system

作　　者：伍韵文 郭劲松 吴海东 王朝霞 宋巍 

机构地区：[1]国家电网四川省电力公司乐山供电公司,四川乐山614000 [2]国网冀北电力有限公司检修分公司,北京102488

出　　处：《电力系统保护与控制》2015年第3期123-126,共4页Power System Protection and Control

摘　　要：随着电力线载波通信在电力系统中的广泛应用,宽带多输入多输出系统会有共信道干扰,此干扰是除了异步脉冲噪声和周期脉冲外影响电力线载波宽带MIMO系统最大的因素。针对此问题,利用多输入多输出信道的状态信息,在发送端采用块对角化的方法消除信道间的干扰,从而提高宽带电力线载波系统的容量,同时降低了系统的误比特率。通过仿真结果和分析可以表明,所提的块对角化的预编码方法有效地消除了共信道干扰,提高了信干噪比,从而提高了系统的最大互信息并降低了系统的误比特性能。With the widespread application of power line carrier communication, broadband multi-input multi-output（MIMO） system will have a co-channel interference which is the largest factor influencing the MIMO system of broadband power line carrier in addition to asynchronous pulse noise and pulse cycle. Aiming at this problem, this paper, by using multiple input multiple output channel state information, the sender with the method of block diagonalization, eliminates the interference between the channel, so as to improve the capacity of broadband power line carrier system, at the same time reduces the bit error rate of the system. Through the simulation results and analysis can show that the proposed block diagonalization precoding method effectively eliminates the common channel interference, improves the drying ratio, thus enhances the maximum mutual information of the system and reduces the bit error performance of the system.

关 键 词：电力线载波 块对角化 预编码 多输入多输出 干扰消除 

分 类 号：TN919.3[电子电信—通信与信息系统]