Numerical Investigation of Long-Haul Coherent Optical Generalized Frequency Division Multiplexing Signal

Abstract

Generalized frequency division multiplexing (GFDM) is a recent physical layer scheme proposed for next-generation cellular systems. Like orthogonal frequency division multiplexing (OFDM), it is based on multicarrier modulation, but the filter shape is no longer rectangular (roll off ࣔ 0) and the orthogonality between subcarriers is lost. With higher flexibility, low peak to average power ratio (PAPR) and reduced out-of-band emissions compared with OFDM, GFDM modulation is an attractive candidate for 5G application scenarios. This paper explores the performance of 10 Gb/s GFDM system over the optical link in terms of PAPR, quality factor (Q factor), and mean squared error using a third-order adaptive Volterra filter with 3 and 5 taps. The impact of linear impairments (chromatic dispersion, polarization mode dispersion), laser line width, and Mach-Zehnder non-linearity have been addressed. The results of our simulations indicate that the transmitted 10 Gb/s GFDM signal through an optical fiber can reach 930 Km and Q = 11.9 dB after 700 Km at-8 dBm of launch power using 5 taps third-order adaptive Volterra equalizer with an improvement of approximately 210 Km and 1.25 dB compared with the same equalizer with 3 taps.

Globalization in Photonics Research and Development

“…Among these is the contribution made by Professor Rabah Attia and his research group at the SERCOM Laboratory, Tunisia Polytechnic School [https://ept.tn/sercom]. Their focus included work in photonic crystal components [45], the development of electro-optic modulators tailored for advanced optical communication systems, and in optical Code Division Multiple Access (OCDMA) [46].…”

Cross-phase modulation compensation in multichannel system based on filter bank multicarrier modulation

“…The goal of this method is to minimize the error function given as the sum of the difference between the desired signal and the estimated output for all the samples. 27 The structure of the adaptive TOV equalizer with a memory of two (M ¼ 2) is depicted in Fig. 5.…”