Aiming at the flicker problem in visible light communication,this paper proposes an adaptive puncturing method for dimming control through Manchester encoding cascaded polar codes.The polar code is cascaded with the Manchester code to provide 50 % dimming in the visible light communication system,and a dimming value not equal to 50 % can be achieved by puncturing and inserting compensation bits.The conventional puncturing scheme should puncture all the bits of the Manchester code symbol,and the method proposed in this paper can adaptively puncture the predetermined frozen bits of the selected polar code and insert the corresponding compensation bits.Therefore,compared with the conventional puncturing method,the proposed method can puncture fewer bits of Manchester coded symbols and requires fewer compensation bits.Simulation results show that the proposed method has better error performance than the reference method.