Performance Evaluation of OFDM and Impulse-Radio Ultra-Wideband over Fiber Distribution for In-Building Networks

摘要

This paper reports the compared performance of the two main ultra-wideband (UWB) implementations, OFDM-based (OFDM-UWB) and impulse-radio UWB, when transmitted over optical fiber for in-building communications employing external electro-optic modulation. Both UWB implementations providing similar spectral efficiency, 0.378bit/s/Hz and 0.392bit/s/Hz respectively, are analyzed when transmitted over 300m of standard single mode fiber (SSMF) or multimode fiber (MMF) link. The experimental results indicate that OFDM-UWB transmission is feasible for optical launch power levels of 2dBm for both SSMF and MMF distribution. The impulse-radio UWB implementation achieves error-free SSMF transmission from -4dBm launched power. The experimental results indicate that successful MMF transmission can be only achieved for impulse-radio UWB at 3dBm launched power level.