How to resist interference caused by power line carrier signal attenuation in PLC?

Enhancing the anti-interference capability of power line carrier PLC signals requires improving signal strength and receiver sensitivity. The transmitter employs a power amplifier with adjustable output power, up to a maximum of 10W. The receiver uses a low-noise amplifier with a noise figure of less than 3dB. Bandpass filters are deployed along the signal path to suppress out-of-band interference. Spread spectrum communication technology, such as FHSS, is used to distribute signal energy across a wider frequency band. Adaptive gain control (AGC) dynamically adjusts the receiver gain. In actual testing, with a signal-to-noise ratio (SNR) of 10dB, the bit error rate should be below 10^-5. This anti-interference design can increase communication distance by 30% and ensure stable operation in harsh power line environments.