CEMD Solar Noise Suppression for OFDM based Visible Light Vehicular Communication

This paper proposes a solar shot noise suppression algorithm using the complex empirical mode decomposition (CEMD) for the orthogonal frequency division multiplexing (OFDM) based visible light vehicular communication. The primary empirical mode decomposition can be used only for real-valued signals. In this work, it is extended to use in the complex realm signals. After the desired signal is broken down into its intrinsic mode functions (IMF), the noisy frequencies are easily eliminated. The performance results show that this CEMD - based noise suppression algorithm is a good alternative for mitigating intense background radiation.