ACO–OFDM with Improved Bandwidth Efficiency over Long Haul and MIMO Optical Fiber Communication Systems

Abstract

Authors propose an improved orthogonal frequency division multiplexing (OFDM) scheme in which the information samples are transmitted in otherwise discarded negative frame of asymmetrically clipped OFDM (ACO–OFDM). ACO–OFDM has two similar positive and negative OFDM envelopes so that clipping does not result in loss of signal information. The flipped polarity negative samples are inserted at the zeros of positive frame or back to back with positive frame, in time-compressed frame such that composite signal has the same frame duration as ACO–OFDM but improved transmission power, bandwidth efficiency. Simulation results for bit error rate with respect to number of subcarriers and optical launch power show that the proposed time-compressed OFDM frames perform better in high-dispersion condition over long distance, high data rate, and high transmission power over single-mode fiber. It has been demonstrated that the proposed time-compressed frame structure also performs well with the 2*2 MIMO setup for multimode fiber link.

Keywords:

• ACO–OFDM
• Bandwidth
• Efficiency
• Dispersion
• Nonlinearity
• MIMO

Additional information

Notes on contributors

Usha Choudhary

Usha Choudhary is a research scholar at the Department of Electronics and Communication Engineering, Malaviya Institute of Technology, Jaipur, India. She received her BE degree (Hons) from Jai Narayan Vyas University, Jodhpur, India in 2001 in electronics and communication engineering. She received her M.Tech degree from Rajasthan Technical University, Kota, India in 2014 in digital communication. She has worked as an assistant professor at Govt College of Engineering and Technology (CET) Bikaner, Modi Institute of Technology (MIT), Kota and JECRC University, Jaipur, Rajasthan, India. Her areas of interest include optical communication, fiber optics, mobile and wireless communication. Corresponding author. Email: [email protected]

Vijay Janyani

Vijay Janyani is a professor with the Department of Electronics and Communication Engineering at Malaviya National Institute of Technology (MNIT), Jaipur, India. He obtained his bachelor's and master's degrees in engineering from Malaviya Regional Engineering College (now MNIT) Jaipur, and PhD from University of Nottinghan, UK under Commonwealth Scholorship Scheme. He is a recipient of various awards such as the Derrick Kirk Prize of University of Nottingham, UK for excellence in research and Career Award for Young Teachers of All India Council for Technical Education (AICTE), New Delhi. He has been a visiting faculty at the Asian Institute of Technology Bangkok under faculty secondment scheme of Government of India. His current research interests include optical communication, solar cells, photonic crystals, nonlinear optoelectronics, all-optical systems, and numerical modeling. Email: [email protected]