How to suppress power line carrier modulation interference in PLCs?

Suppressing modulation interference on power line carriers (PLCs) requires optimizing the modulation scheme and filter design. Anti-interference modulation methods, such as OFDM (Orthogonal Frequency Division Multiplexing), are employed to distribute the signal across multiple subcarriers. At the transmitter, digital predistortion (DPD) technology is used to reduce harmonics and intermodulation components. An adaptive equalizer is deployed at the receiver to compensate for channel distortion. High-Q bandpass filters are used to suppress adjacent channel interference. Through simulation analysis of the modulation spectrum, parameters are optimized to ensure out-of-band radiation is below -40 dBc. In actual testing, under conditions of modulation interference, the system bit error rate should be below 10^-6. Suppressing modulation interference improves spectral efficiency and supports higher data rates.