Influência dos formatos de modulação no desempenho dos sistemas ts-ocdma.

Abstract

The efficient use of a transmission channel can be achieved by means of Code Division Multiple Access (CDMA) technology. This multiplexing technique uses spectral spreading to allow multiple users to share the transmission medium asynchronously. CDMA systems applied to the optical medium are known as OCDMA systems and these can be classified as coherent or incoherent, depending on how the user code is applied to the optical signal. The present work performs a comprehensive analysis on the influence of digital modulation techniques on a coherent OCDMA system with Time-Spread (TS-OCDMA). In this context, the simulation variables were approximated to values of practical systems, so that the results of this work can be a reference for a real implementation. Thus, the performances of OCDMA systems with different digital modulations are compared in terms of bit error rate (BER).