How does poor grounding in a power line carrier PLC cause packet loss?

The mechanism by which poor grounding in power line carrier PLCs causes packet loss is mainly due to increased ground noise and common-mode interference leading to signal errors. Excessive grounding resistance (>1Ω) or inductance (>100nH) causes ground potential fluctuations, resulting in a drift in the receiver's reference signal level and misinterpretation. Common-mode noise couples to the signal line through ground loops, superimposing on the carrier signal and reducing the signal-to-noise ratio. The solution is to optimize the grounding system: use low-impedance grounding materials, reduce the grounding path length, and adopt a star grounding structure. Deploy a common-mode inductor CML3225A-510T and an ESD protection device ESDLC5V0D3B at the signal interface to suppress common-mode noise. Add error correction coding and retransmission mechanisms at the protocol layer. In actual testing, ground noise measured with an oscilloscope should be less than 100mVpp; using a bit error rate tester, the bit error rate after grounding optimization should be less than 10^-6, and the packet loss rate should be reduced to below 0.1%.