The design and realization of APD receiving circuit used in M-ary VLC

Visible-light wireless communication is an optical communication technology rising with the development of white LED lighting technology. Based on the analysis of current visible light communication technology, the paper aims at the application requirement of m-ary modulation communication system, and designs the component of APD receiving circuit. Firstly, this article specifies the operating principle of APD detection circuit, secondly, the paper designs and analyzes circuit structure and function of each part of the system of high voltage circuit, lastly, the detection module of m-ary visible light communication (VLC) receiving circuit´s relevant test is carried out. The results show that the design is valid and feasible and the APD receiving circuit has the advantages of high gain, wide bandwidth, good stability, which has good application value on m-ary visible light communication and provide the basis for the further studies of m-ary VLC.