Data Packet Interception Tool Design Based On PLC

Based on the analysis of low voltage power line communication channel characteristics and discussion of spread spectrum communication technology,we had been completed mainly data packet interception tool design on PLC and then improved it by FIR filter of FPGA.After a detailed theoretical analysis, we had investigated the demestic market of PLC chips and choosed five common PLC chips and one MCU with rich resource to finish all of the design.This article mainly introduce the design process on hardware and software.Based on the design,we had improved the bandpass filter on peripheral circuit of two PLC chips with multiple carrier frequencies and mainly used FIR filter of FPGA to achieve the switch of multiple carrier frequencies.