Direct-detection polarization division multiplexed orthogonal frequency-division multiplexing transmission systems without polarization tracking

2012 ◽  
Vol 37 (24) ◽  
pp. 5070 ◽  
Author(s):  
Chih-Yun Wang ◽  
Chia-Chien Wei ◽  
Chun-Ting Lin ◽  
Sien Chi
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Transmission Systems

Modeling and spectral analysis of high speed optical fiber communication with orthogonal frequency division multiplexing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Demissie Jobir Galmecha ◽  
Bekele Tesema Hora ◽  
Ram Sewak Singh
Keyword(s):  
Optical Fiber ◽  
Optical Communication ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Direct Detection ◽  
Coherent Detection ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Transmission Systems ◽  
Data Rates

Abstract Optical communication has emerged as the best solution to high-speed transmission systems due to its higher bandwidth and higher data rates. The higher data rates with simple transmitter and receiver modeling are one of the best solutions to design the spectrally efficient high-speed optical transmission system using different modulation techniques. In the recent past, optical communication networks have been specifically designed and optimized to support different communication standards increasing the capabilities of optic fiber, integrated waveguides, and related optical fiber hardware, and signal conditioning circuits. So, this research paper presents a study, modeling, simulation, and analysis of optical performance under different transmission systems which are considered in a practical high-speed design using orthogonal frequency division multiplexing (OFDM). This can be done by using both coherent detection OFDM and direct detection OFDM to minimize dispersion effects in optical communication because OFDM is basic for modern technology to increase the data rate and increase the requirement of bandwidth in broadband services. Many optical fiber problems, such as chromatic dispersion (CD) and polarization mode dispersion (PMD) are solved using OFDM. The performance analyses made in this work by using different parameters such as bit error rate (BER), optical signal-to-noise ratio (OSNR), quality (Q) factor at different distance transmission by using different quadrature modulation such as 4-QAM, 16-QAM, 32-QAM, and 64-QAM to maintain the OSNR value, spectral efficiency, and the required data rates. The simulated results have shown that the coherent detection OFDM and direct detection OFDM with considered QAM provides the best value of BER and quality of the signal at a specific distance.

Key Technologies for Optical OFDM in Optical Long-Haul System Using Direct-Detection

2015 ◽  
Vol 719-720 ◽  
pp. 845-850
Author(s):  
Yi Tang ◽  
Ping Xing Feng
Keyword(s):  
Theoretical Model ◽  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Single Sideband ◽  
Key Technologies ◽  
Optical Single Sideband ◽  
Optical Ofdm

A comprehensive theoretical model of direct detection (DD) optical orthogonal frequency division multiplexing (OOFDM) system is described in general. The principle of OOFDM is introduced in detail. Several key technologies in DD-OOFDM system have been discussed. The advantages and methods for optical single sideband (OSSB) and channel estimation are analyzed completely. Other key technologies are introduced briefly.

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