A NONDIRECTIVE INFRARED TRANSCEIVER FOR INDOOR HIGH-SPEED WIRELESS DATA COMMUNICATION

A prototype of the IM bps non-directive infrared wireless transmission system was designed, and tested. System design considerations about c hannel property, optoelectronics devices characteristics, modulation s chemes are discussed, and issues about the circuit design and the impl ementation are described. In this system, the pulse position modulatio n (PPM) with short pulse duration and the analog-multiplier type demod ulator were used. The feasibility of nondirective transmission is full y demonstrated and can support successful data communication in a typi cal room. The system architecture can be upgraded to data rates such a s 2M bps or higher by only changing circuit parameters.