Next Generation UWOC System Based on MIMO and QAM - OFDM Modulation Techniques

2018 ◽  
Author(s):  
Alaa H. Ali ◽  
Shehab A. Kadhim ◽  
Hasan M. Azzawi
Keyword(s):  
Next Generation ◽  
Ofdm Modulation ◽  
Modulation Techniques

scholarly journals Using adaptive four-band OFDM modulation with 40 Gb/s downstream and 10 Gb/s upstream signals for next generation long-reach PON

2011 ◽  
Vol 19 (27) ◽  
pp. 26150 ◽  
Author(s):  
C. H. Yeh ◽  
C. W. Chow ◽  
H. Y. Chen ◽  
B. W. Chen
Keyword(s):  
Next Generation ◽  
Ofdm Modulation

LTE Quality of Service Enhancement Under OFDM Modulation Techniques

2020 ◽  
Vol 113 (2) ◽  
pp. 995-1008 ◽  
Author(s):  
Gebrehiwet Gebrekrstos Lema ◽  
Teklehaymanot Baweke Reda ◽  
Dawit Hadush Hailu
Keyword(s):  
Quality Of Service ◽  
Ofdm Modulation ◽  
Modulation Techniques

Reconfigurable Antenna Systems for the Next Generation Devices Based on 4G/5G Standard

2017 ◽  
Vol 7 (2) ◽  
pp. 53-71
Author(s):  
Massimo Donelli
Keyword(s):  
Microwave Antenna ◽  
Reconfigurable Antenna ◽  
Next Generation ◽  
Adaptive Arrays ◽  
Mimo Antennas ◽  
Fully Adaptive ◽  
Multiple Input ◽  
Modulation Techniques ◽  
High Bandwidth ◽  
Antenna Systems

This article is devoted to showing the applications of innovative reconfigurable antenna systems suitable for the next generation 4G/5G devices. Microwave antenna technology can be very useful for next generation devices based on 4G/5G standards. Next generation tablets and smartphones based on 4G/5G standards will require high bandwidth and high velocity channels with respect to conventional devices. This work tries to present a complete overview of possible applications of advanced antenna technologies for 4G/5G devices and systems. Methodologies, such as phased and fully adaptive arrays, multiple-input and multiple-output (MIMO) antennas based on compact Rotman lenses or butler matrices, development of innovate reconfigurable antennas based on reconfigurable parasitic structures or new materials such as graphene, and unconventional modulation techniques have been investigated in this work. The work ends with some conclusions and considerations related to ideas for future works.

scholarly journals Performance Evaluation of symmetric 8×10 Gbps TWDM-PON incorporating Polarization Division Multiplexed Modulation Techniques under fiber-impairments

2021 ◽  
Author(s):  
Meet Kumari ◽  
Reecha Sharma ◽  
Anu Sheetal
Keyword(s):  
Wavelength Division Multiplexing ◽  
Rural Areas ◽  
Transmission Rate ◽  
Access Network ◽  
High Capacity ◽  
Optical Power ◽  
Passive Optical Network ◽  
Next Generation ◽  
Power Budget ◽  
Modulation Techniques

Abstract Today’s access networks are in high demand to fulfill the high bandwidth requirement because of extensive improvement in high transmission rate applications for cloud computing, big data analytics, and other next-generation 5G smart applications. This exponential growth of high capacity and broadband access technologies comprise an essential trend in the development of a passive optical network (PON) access network. In this paper, 80/80 Gbps time wavelength division multiplexing PON (TWDM-PON) incorporating polarization division multiplexing (PDM) based Mach-Zehnder modulator (MZM) and electroabsorption modulator (EAM) techniques have been proposed. The performance of the system consisting of different polarized multiplexed modulation techniques is investigated in both downstream and upstream data transmission for variable transmission distance and received optical power in terms of bit error rate (BER), eye diagrams, power budget (PB) and receiver sensitivity (RS). The results show that the 4×20/20 Gbps PDM-EAM modulated signals over 100 km fiber distance at -60 dBm RS and 70 dB PB are successfully transmitted under fiber non-linearities. The proposed TWDM-PON system provides a next-generation long-reach access network from urban to rural areas.

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