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Optical Line of Sight Communication (OLSC) is considered to be future wireless communication technology. OLSC may be used to replace the existing radio frequency communication system and to overcome demerits due to resembling data transmission speed, security and health hazards. OLSC uses high illuminating LEDs as a source of light as well as a communicating source at the same time. To achieve high speed communication in OLSC, using various modulation techniques such as Pulse Width Modulation (PWM), Pulse Position Modulation (PPM) and Orthogonal Frequency Division Multiplexing (OFDM) may be used. In this paper, we propose an optical light communication scheme (OLCS) data transfe using PWM technique for point to point (PC to PC) communication. To evaluate its performance, several tests were conducted based on the parameters such as data transmission (different baud rates), transmitter and receiver distance analysis using different wavelengths of LEDs based on the transmitter and receiver's angle of view. Additionally, we measured the PC to PC communication system performance which resulted the data transmission distance of 3.2 meters at 38400 baud rate and with less bit error rate (BER) 10 -4 without affecting the lighting function.

Design of PC to PC Data Transfer System Using Optical Line of Sight Wireless Communication (OLSWC) Technology