We developed a wireless infrared digital transmission system that uses a data rate of 150 Mbps. The advantage of this system is not to interfere with the infrared remote control unit, wireless headphone, and other infrared communications. The target is low cost. Therefore, this system uses a high speed LED transmitting part and a PIN p hotodiode of the receiving part. The modulation method is 64QAM and its used frequency band is 30MHz. An UP/Down conversion, a modulator part and a demodulation part all use digital signal processing. Therefore, it is possible to make hardware deterioration at a minimum. The wireless infrared transmission distance reached over 20 m. This is sufficient enough for consumer use.
