Inthispaper,ablindequalizationschemebasedontheconstantnormalgorithm(CNA)isproposedforasymmetricallyclippedopticalorthogonalfrequencydivisionmultiplexing(ACO-OFDM)invisiblelightcommunication(VLC)system.Atthereceiver,theCNAcanbeusedtoimprovesystemspect