面向MIMO-PLC系统的PC-STBC方案  

PC-STBC scheme for MIMO-PLC system

作　　者：王鑫 彭小峰 高会翔 李小双 WANG Xin;PENG Xiaofeng;GAO Huixiang;LI Xiaoshuang(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2023年第5期244-252,共9页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市基础与前沿研究计划项目(cstc2015jcyjA40051);重庆市研究生科研创新项目(CYS18311);重庆市教委基金项目(KJ120827);重庆市教委科学技术项目(KJ1500934,KJ1709205);重庆市教委青年科技研究项目(KJQN202101124)。

摘　　要：针对电力线通信信道衰弱强以及噪声干扰大导致系统误码性能差的问题,提出了一种适用于多输入多输出电力线通信系统的极化码级联空时编码的方案。信息源通过高斯构造为极化码,然后把极化码调制为符号与空时编码进行级联。仿真结果表明:在电力线脉冲噪声环境中,多输入多输出电力线通信系统误码率为10-4时,极化码级联空时编码方案相比空时编码方案系统误码性能更好,增益约为7.2 dB,在系统误码率为5×10-4时,极化码级联空时编码方案相比Turbo码级联空时编码方案系统增益约为0.2 dB。减少衰弱路径数和脉冲噪声强度,级联编码方案表现出更好的抗干扰能力,在系统误码率低于10-3时,系统编码增益可多提升0.2~0.5 dB。此外,由于极化码特性,级联编码降低码率、增加码长可以进一步改善系统误码性能。A polarization code cascade space-time coding scheme for multiple-input and multiple-output power line communication systems is proposed to address the problem of poor system BER performance due to strong channel fading and great noise interference in power line communication.The information source is constructed as a polarization code by Gaussian,and then the polarization code is modulated into a symbolic and space-time block code for cascading.The simulation results show that the system BER performance of the polarization code cascade space-time block coding scheme is better than that of the space-time coding scheme,with a gain of about 7.2 dB in a power line impulse noise environment with a BER of 10-4 in the multi-input and multi-output power line communication system.When the system BER is 5×10-4,the system gain of the polarization code cascade space-time block coding scheme is about 0.2 dB,compared with the Turbo code cascade space-time coding scheme.By reducing the number of weak paths and pulse noise intensity,the cascade coding scheme shows a better anti-interference ability,and the system coding gain increases by a range of 0.2 dB to 0.5 dB more when the BER is below 10-3.In addition,due to the characteristics of polarization codes,the system BER performance can be further improved by decreasing the code rate or increasing the code length of the cascade coding.

关 键 词：电力线通信 多输入多输出 极化码 级联 空时编码 

分 类 号：TN913.6[电子电信—通信与信息系统]