一种适用于电力线通信系统的抗窄带噪声方法

针对现有的电力线通信方案在抗窄带噪声能力方面的不足,设计了一种基于OFDM技术实现的抗窄带噪声的方法。该方法通过对信道特性的分析,将有效子载波动态地划分成若干子带,形成独立的子带系统,将数据在子带间进行重复,并在子带间独立编码校验,从而增强了系统抗窄带噪声性能,降低了系统误码率,且编码方案简单有效,不需要接收端反馈和MAC层参与。仿真分析证明,该方法在抗窄带噪声方面明显优于现有系统。

Narrowband noise rejection for power line communication system

A scheme based on OFDM is designed to improve the narrowband noise rejection capability of existing power line communication system,which,based on the analysis of communication channel characteristics,divides dynamically the valid sub-carrier into several sub-bands to form independent sub-band system.The data are encoded,checked and repeated individually among sub-bands to reduce the error rate and enhance the anti-narrowband-noise capability of system.The encoding scheme is simple and effective,which does not need the response of receiver and the involvement of MAC layer.Simulative analysis verifies that the proposed scheme is distinctly better than existing ones in narrowband noise rejection.