The Design And Implement Of The Visible Light Communication Transceiver Modules

In recent years, the visible light communication(VLC) technology has shown great potential. By VLC the light-emitting diode is used and visible light source provide a-high-speed brightness variations which human eyes could not sense.Compared with the traditional radio frequency wireless communication as well as other spectrum of optical communication, VLC has more advantages such as high security, high transmission power, without spectrum, etc. To accelerate the research and development of optical communication industrial chain in the visible light communication technology, so it's necessary for us to improve and enhance the visible light communication on the various performance indicators of a breakthrough technology.In view of the present research situation of visible light communication technology designing and manufacturing visible light communication transceiver modules which have our own independent intellectual property rights has a long term to promote the development of optical technology in China.The signal transmission quality of the transceiver module which is in the physical part affects the performance of the whole VLC system. In order to improve the performance of the transceiver module, we need two parts of work--the design of physical circuit and the realization of signal modulation encoding.It describes the theoretical study of the photoelectric detection circuit, the weak signal amplification circuit, the low pass filter, and the input signal current amplifying circuit,and summarized the method to determine the important parameters of VLC system's transceiver module circuit design according to the results of the simulation. Design the transceiver module according to the theory results, and have a test of the maximum communication distance and the highest frequency of signal transmission. Eventually, after a transceiver module joint debugging, to achieve 1 MHZ signal transmission under the maximum 1m communication distance and top 5 MHZ signal transmission under 0.5m communication distance.