The interference of broadband power line carrier communication leads to an increase in frequency offset between carriers and a decrease in carrier anti-interference ability.Therefore,a power line broadband carrier anti-interference communication method based on PPDA technology is proposed.Simulate the background noise on the carrier communication channel,and combine it with an improved variational mode decomposition algorithm to preprocess the noise signal.Filter out broadband carrier interference by adjusting the amplitude of the sine wave.A PPDA carrier amplitude modulation framework is constructed to achieve intelligent modulation of carrier amplitude and avoid mutual interference between sub information flows.The experimental results show that the signal reception points of this method are relatively concentrated,and there is no significant signal frequency shift phenomenon.The final received signal strength reaches 360 dB,indicating that the communication anti-interference ability of this method under application is strong.
关键词
PPDA技术/载波抗扰通信/信号频率偏移/改进变分模态分解
Key words
PPDA technology/carrier anti-interference communication/signal frequency offset/improved variational modal decomposition
维普
万方数据