Research on Channel Estimation Algorithm of Visible Light ACO-OFDM System

Aiming at the problem that the Communication error rate of Visible Light Communication (VLC) system is very high under NLOS (Non-Line of Sight) link, this paper improves the channel estimation algorithm based on compressed sensing technology to reduce the Communication error rate. A channel estimation algorithm based on Modified-Sparsity Adaptive Multipath Matching Pursuit (M-SAMMP) was proposed to accurately obtain the impulse response of the transmission channel, The transmitting signal can be demodulated accurately at the receiving end so as to improve the communication performance of the system.