High data rate MIMO-OFDM system with orthogonal delay diversity realization

2004 ◽  
Author(s):  
Yao Chen ◽  
U. Tureli ◽  
E. Aktas
Keyword(s):  
Data Rate ◽  
High Data Rate ◽  
Ofdm System ◽  
High Data ◽  
Mimo Ofdm ◽  
Delay Diversity

Incorporating SDC Module for ISI Compensation for a Long-Haul Co-OFDM System

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Anu Chauhan ◽  
Arti Vaish
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Dispersion Compensation ◽  
Data Rate ◽  
High Data Rate ◽  
Error Vector Magnitude ◽  
Ofdm System ◽  
Rate System ◽  
High Data ◽  
Ofdm Signal ◽  
Compensation Technique

AbstractWith the increase in demand of bandwidth hungry applications, it is recommended to develop a high data rate system for long-haul coherent optical orthogonal frequency division multiplexing (CO-OFDM). At a very high data rate, CO-OFDM signal experiences deterioration. At 50 Gbps, the signal experiences ISI effect and in order to overcome this ISI effect, a prolonged system has been developed to reach optimal ISI compensation technique. One of the prominent and competent techniques to enhance system performance is (SDCM) symmetrical dispersion compensation module. In order to make system more bandwidth efficient 4-QAM (Quadrature Amplitude Modulation) with gray coding is applied and manual adjustments are done at receiver phase to decrease error vector magnitude (EVM). OFDM data stream is successfully transmitted over a distance of 4,000 km to compete the demand of long-haul CO-OFDM system. With different launch powers and laser linewidths, the performance of the system is enhanced in terms of Q-factor, SNR and EVM.

scholarly journals Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations

2021 ◽  
Vol 72 (3) ◽  
pp. 192-197
Author(s):  
Necmi Taspınar ◽  
Mahmoud Alhalabi
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Dispersion Compensation ◽  
Data Rate ◽  
High Data Rate ◽  
Ofdm System ◽  
Propagation Length ◽  
Eye Diagram ◽  
High Data ◽  
Transmission Distance

Abstract In this paper and as a first time, we have designed and simulated 100 Gbps long haul intensity modulation and direct detection (IM/DD) optical orthogonal frequency division multiplexing (OFDM) system with high order modulation techniques by using optisystem software QAM IM/DD OFDM system was analyzed and simulated to provide high data rate for downstream signal by using dispersion compensation fiber (DCF) inside fiber link. 4-QAM OFDM system demonstrated the best BER performance compared to other simulated systems for long haul transmission distance. For comparison and investigation, important results as eye diagram, Q factor, Eb/No and BER are explained against propagation length for every simulated system.

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