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Updated: May 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
The robustness of subcarrier-index modulation in 16-QAM CO-OFDM system with 1024-point FFT
Omar H A Jan1, David Sandel, Kidsanapong Puntsri
1University of Paderborn, EIM-E, Warburger Str. 100, 33098 Paderborn, Germany. omar@ont.upb.de
Abstract:
We present in numerical simulations the robustness of subcarrier index modulation (SIM) OFDM to combat laser phase noise. The ability of using DFB lasers with SIM-OFDM in 16-QAM CO-OFDM system with 1024-point FFT has been verified. Although SIM-OFDM has lower spectral efficiency compared to the conventional CO-OFDM system, it is a good candidate for 16-QAM CO-OFDM system with 1024-point FFT which uses a DFB laser of 1 MHz linewidth. In addition, we show the tolerance of SIM-OFDM for mitigation of fiber nonlinearities in long-haul CO-OFDM system. The simulation results show a significant penalty reduction, essentially that due to SPM.
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