摘要
论文在分析电力线通信的比特交织编码宽带脉冲调制系统的基础上,将脉冲调制与直接序列码分多址(DS-CDMA)相结合来获取正交调制的形式并实现用户复用,设计了频域(FD)接收器信号处理算法并推导出最大似然频域接收器,该接收器可抑制脉冲噪声以及由频率生成的码间干扰(ICI)和多址干扰(MAI)。采用来自信道解码器的简单硬反馈来提高信道频率响应以及ICI、MAI和噪声相关的估计性能。仿真结果表明,该方案通过宽带脉冲以及扩频码和比特交织卷积码可稳健的扩展符号能量。
Based on the analysis of bit interleaved coding broadband pulse modulation system in power line communication,this paper combines pulse modulation with direct sequence code division multiple access(DS-CDMA)to obtain orthogonal modula tion and realize user multiplexing.The FD receiver signal processing algorithm is designed and the maximum likelihood frequency domain detector is deduced.The detector combines impulse noise with inter-symbol interference(ICI)and multiple access interfer ence(MAI)generated by frequency.Simple hard feedback from channel decoder is used to improve channel frequency response and ICI-MAI noise-related estimation performance.The simulation results show that the scheme can expand symbol energy robustly through broadband pulse,spread spectrum code and bit interleaved convolutional code.
作者
王晓峰
张之栋
WANG Xiaofeng;ZHANG Zhidong(Northeast Branch of State Grid,Northeast Power Control Subcenter of State Grid,Shenyang 110180)
出处
《舰船电子工程》
2019年第10期106-112,共7页
Ship Electronic Engineering
关键词
电力线通信
接收器
信号处理
脉冲调制
接序列码分多址
power line communication
receiver
signal processing
pulse modulation
sequence code division multiple access
