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16‐ QAM all‐optical OFDM system performance evaluation with time and frequency offsets
Author(s) -
Ali Mumtaz,
Dai Bo,
Wang Xu
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29172
Subject(s) - orthogonal frequency division multiplexing , subcarrier , transmitter , cyclic prefix , frequency offset , electronic engineering , intersymbol interference , bit error rate , quadrature amplitude modulation , qam , interference (communication) , utc offset , computer science , telecommunications , engineering , channel (broadcasting) , global positioning system
In an all‐optical orthogonal frequency division multiplexing (AO‐OFDM) system, symbol time misalignment (STM) and subcarrier frequency offset (ScFO) between transmitter and receiver result in intercarrier interference (ICI) and intersymbol interference, leading to a degradation of the system performance. In this article, an analytical study of the impacts of STM and ScFO on the bit error rate (BER) performance of superchannel based on 16‐QAM modulated all‐optical OFDM transmitter with coherent detection is conducted. Under the condition BER = 10 −3 , maximum acceptable relative deviations for the STM and ScFO are 3.2 and 5.5% in AO‐OFDM system. A delay line interferometer (DLI)‐based ICI suppression method is proposed, and the results demonstrate that the tolerances to relative deviations for the STM and ScFO increase to 29 and 10% without cyclic prefix. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1593–1597, 2015