With the invention of the white LED and its rapid development,visible light wireless communication has become the new wireless communications technology in the spotlight.LED lighting with excellent capabilities and modulatable characteristics not only meet the ordinary indoor lighting,but can also function as the means for data communications.This paper briefly describes the interior white LED communication system,provide a general comparison of the LED communication system and the RF communications,an analysis of the indoor lighting layout is also included.After contrast the differences between various modulation methods,it continues to the most basic wireless technology OOK modulation simulation.Finally,design and conduct experiments on the basis of the existing LED visible light communication system,and achieve appropriate data accordingly.