Power lines broadband carrier anti-interference communication method based on PPDA technology
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.
PPDA technologycarrier anti-interference communicationsignal frequency offsetimproved variational modal decomposition