Abstract

In this paper, we focus on a well-known optical fronthauling architecture based on frequency division multiplexed digital signal processing (DSP)-assisted channel aggregation, and we present new results related to the optimization of the optical setup, proposing an efficient technique for the optimization of the transmission. In particular, we report an original pre-emphasis technique to equalize the performance of the radio channels, especially focusing on the upstream (US) link that has more critical characteristics but has not typically been treated in detail in previous works on this topic. The effects of both radio and optical impairments on the error vector magnitude (EVM) are taken into account. An analytical description of our approach is provided, and then it is applied on an experimental setup (able to aggregate up to 96 20-MHz radio signals), showing the possibility of minimizing the maximum EVM at the output of the fronthauling link, for both downstream and US transmission. Additionally, a low complexity technique to practically estimate the EVM per channel by taking advantage of only the DSP-aggregation/deaggregation functionalities is proposed and, again, experimentally demonstrated.

© 2017 Optical Society of America

Digital Mobile Fronthaul Based on Delta–Sigma Modulation for 32 LTE Carrier Aggregation and FBMC Signals

Jing Wang, Zhenhua Yu, Kai Ying, Junwen Zhang, Feng Lu, Mu Xu, Lin Cheng, Xiaoli Ma, and Gee-Kung Chang
J. Opt. Commun. Netw. 9(2) A233-A244 (2017)

Analog fiber-wireless downlink transmission of IFoF/mmWave over in-field deployed legacy PON infrastructure for 5G fronthauling

K. Kanta, A. Pagano, E. Ruggeri, M. Agus, I. Stratakos, R. Mercinelli, C. Vagionas, P. Toumasis, G. Kalfas, G. Giannoulis, A. Miliou, G. Lentaris, D. Apostolopoulos, N. Pleros, D. Soudris, and H. Avramopoulos
J. Opt. Commun. Netw. 12(10) D57-D65 (2020)

Performance Analysis of Analog IF Over Fiber Fronthaul Link With 4G and 5G Coexistence

Amol Delmade, Colm Browning, Arman Farhang, Nicola Marchetti, Linda E. Doyle, R. David Koilpillai, Liam P. Barry, and Deepa Venkitesh
J. Opt. Commun. Netw. 10(3) 174-182 (2018)

Comparison of digital signal processing approaches for subcarrier multiplexed 5G and beyond analog fronthaul

Shabnam Noor, Philippos Assimakopoulos, Minqi Wang, Hazim A. Abdulsada, Naveena Genay, Luiz Anet Neto, Philippe Chanclou, and Nathan J. Gomes
J. Opt. Commun. Netw. 12(3) 62-71 (2020)

Digital mobile fronthaul employing differential pulse code modulation with suppressed quantization noise

Lu Zhang, Xiaodan Pang, Oskars Ozolins, Aleksejs Udalcovs, Richard Schatz, Urban Westergren, Gunnar Jacobsen, Sergei Popov, Lena Wosinska, Shilin Xiao, Weisheng Hu, and Jiajia Chen
Opt. Express 25(25) 31921-31936 (2017)