Improving Optical-Wireless CDMA System Performance in Industrial Environment with Timing Jitters

Abstract

In this paper, a novel analytical model is proposed and formulated to quantify the timing jitters, introduced by environmental changes, in optical-wireless code-division multiple access systems. The model divides every chip in an optical codeword into multiple equal intervals, and each pulse in the codeword can be randomly shifted to one of these sub-chip positions in order to account for the effect of the timing jitters. Our study shows that the new model can make a good use of the time skew of pulses in optical codewords and unconventionally improve O-CDMA performance under a certain condition.