Quadrature amplitude modulation based radio over fiber orthogonal frequency division multiplexing (RoF-OFDM) performance optimization using OptiSystem simulation for spectral efficiency enhancement

Abstract

Abstract This paper has demonstrated the quadrature amplitude modulation (QAM) based radio over fiber orthogonal frequency division multiplexing (RoF-OFDM) performance optimization using OptiSystem simulation for spectral efficiency enhancement. The spectral system efficiency can be enhanced through the different modulation schemes such as quadrature phase shift keying (QPSK) and 8, 16, 32, 64, 256 level based quadrature amplitude modulation (QAM). The optical signal per noise ratio is studied through the fiber link against the transmission distance and data transmission bit rate based various QAM modulation schemes. The output received power is demonstrated and measured at receiver versus the different modulation schemes and data rate transmission at the presence of different transmission distance ranges from 50 km to 150 km. The spectral efficiency, signal per noise ratio, and bit error rate are clarified clearly against the transmission distance with different transmission data rates based on high modulation level QAM modulation scheme.