Optical Radio Channel Propagation in Wireless Communication Systems with LEDs

This paper analyzes optical radio channel propagation characteristics by means of experimental measurement. The channel with an LED and a PD provided by the outstanding technologies co. ltd., is defined as an optical radio channel, and its delay profile is measured by NI-USRPs. As a result, small delayed paths are detected due to the LED or the PD in use. The delay profile is evaluated in a system with single carrier modulation where the frequency domain equalization is applied, in terms of the bit error rate (BER). The transmission performance is about 2dB degraded due to the small delayed paths.