Evaluation of an optical communication system using QPSK, 8PSK and 16PSK phase shift modulation using the FDM technique

Abstract

This article presents the approach of an optical communication system; starting from the signal source, modulation generationand data sending through the channel. The data is modulated using phase shift keying (PSK), using the frequency division multiplexing (FDM) technique. The performance of the optical communications system is analyzed by comparing the Q-PSK, 8-PSK and 16-PSK modulation formats. The following evaluation tools are used: modulation error rate(MER) and vector magnitude error measurement (EVM). It is concluded that the average value in MER for 16-PSK is 41% higher than in Q-PSK and 8-PSK. Likewise, the EVM error is 49% lower compared to Q-PSK and 8-PSK, showing that the 16-PSK format generates a higher performance and quality in the transmission of information for this type of systems.