Abstract:In order to simplify the structure of short distance wireless laser communication system and audio signal processing of the encoding/decoding problem, the principle of the Σ-Δ modulation technology and on off keying (OOK) modulation is analyzed, and the frequency response curves and the hardware design of optical transmitter and receiver are presented. We investigate the system′s performance through the audio signal wireless transmission, and the test data is given. The experimental results show that the data bandwidth of 400 kHz can be achieved, and communication distance can reach above 200 meters at least.