Coherent Optical OFDM-PON Using Phase Diversity Receiver and Phase Estimation

2013 ◽  
Vol 475-476 ◽  
pp. 1697-1700
Author(s):  
Yu Feng Shao ◽  
Jiang Jun Wang ◽  
Shi Kui Wang ◽  
Lian Dong Wang ◽  
Yin Xiang Luo ◽  
...  
Keyword(s):  
Phase Estimation ◽  
Ofdm System ◽  
Phase Diversity ◽  
Optical Ofdm ◽  
Simulation Results ◽  
Diversity Receiver ◽  
Ofdm Signals

In this paper, a novel CO-OFDM system using phase diversity receiver and phase estimating is proposed, theoretically analyzed, and demonstrated by simulation results. 10Gb/s C0-OFDM signals can travel in this system for at least 320km.

Data-aided linear fitting blind phase estimation method for coherent optical OFDM system

2015 ◽  
Vol 31 (2) ◽  
pp. 316-320
Author(s):  
Man Pan ◽  
Xuebing Zhang ◽  
Jianping Li ◽  
Zhaohui Li
Keyword(s):  
Estimation Method ◽  
Phase Estimation ◽  
Ofdm System ◽  
Linear Fitting ◽  
Optical Ofdm

Flipping PTS-OFDM System without Side Information

2011 ◽  
Vol 128-129 ◽  
pp. 874-877
Author(s):  
Ya Zhen Li ◽  
Jing Guan ◽  
Li Qun Huang ◽  
Jie Zhang
Keyword(s):  
Channel Estimation ◽  
Frequency Response ◽  
Side Information ◽  
Data Rate ◽  
Ofdm System ◽  
Channel Frequency Response ◽  
Simulation Results ◽  
Ofdm Signals

In this letter, we propose a novel scheme to reduce the PAPR of OFDM signals. It combined the channel estimation in OFDM system based on comb-type pilots and Flipping PTS algorithm. At the sender we insert comb pilot independently and evenly into every partitioned sub-blocks after partition. The side information of Flipping PTS algorithm as one part of the channel frequency response is transmitted. We can achieve Flipping PTS algorithm without SI. Simulation results show that performance of the new algorithm without SI is worse than the algorithm with SI. However, it reduced PAPR, increased of the data rate.

Design of Optical I/Q Modulator Using Dual-drive Mach-Zehnder Modulators in Coherent Optical-OFDM System

2018 ◽  
Vol 39 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Monika Nehra ◽  
Deepak Kedia
Keyword(s):  
High Speed ◽  
Dispersion Compensation ◽  
Optical Power ◽  
Optical Spectra ◽  
Coherent Detection ◽  
High Rate ◽  
Q Factor ◽  
Ofdm System ◽  
Optical Ofdm ◽  
Simulation Results

AbstractA CO-OFDM system combines the advantages of both coherent detection and OFDM modulation for future high speed fiber transmission. In this paper, we propose an I/Q modulation technique using dual-drive MZMs for high rate 10 Gb/s CO-OFDM system. The proposed modulator provides 10.63 dBm improved optical spectra compared to a single dual-drive MZM. The simulation results in terms of BER and Q factor are quite satisfactory upto a transmission reach of 3,000 km and that to without making use of any dispersion compensation. A BER of about 8.03×10−10and 15.06 dB Q factor have been achieved at −10.43 dBm received optical power.

Research on Timing Synchronization Method for DC-Biased Optical OFDM Communication System

2013 ◽  
Vol 441 ◽  
pp. 911-914 ◽  
Author(s):  
Yong Wang ◽  
Yan Ling Jing
Keyword(s):  
Communication System ◽  
Direct Detection ◽  
Intensity Modulation ◽  
Timing Synchronization ◽  
Ofdm System ◽  
Synchronization Method ◽  
System Use ◽  
Optical Ofdm ◽  
Simulation Results

The timing synchronization methods for dc-biased optical OFDM system are different from wireless OFDM system because dc-biased optical OFDM system use intensity modulation/direct detection. Existing synchronization methods cant be used directly in dc-biased optical OFDM system. Therefore, the new timing synchronization method for dc-biased optical OFDM system is presented. The simulation results show that this timing synchronization method increasingly improves the estimated accuracy of dc-biased optical OFDM system.

Simulative Effect of Cyclic Prefix in Optical OFDM

2014 ◽  
Vol 661 ◽  
pp. 190-194
Author(s):  
A.O. Aldhaibani ◽  
S.A. Aljunid ◽  
Mohd Shamsul Anuar ◽  
A.R. Arief ◽  
H.Y. Ahmed
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Signal To Noise Ratio ◽  
Transmission Efficiency ◽  
Cyclic Prefix ◽  
Frequency Division ◽  
Interference Effects ◽  
Ofdm System ◽  
Guard Interval ◽  
Optical Ofdm ◽  
Simulation Results

Orthogonal frequency division multiplexing (OFDM) is one of the Multi-Carrier Modulation (MCM) techniques that transmit signals through multiple carriers. These carriers (subcarriers) have different frequencies and they are orthogonal to each other. There are different parameters which alter the performance of OFDM system. In this paper, the effect of cyclic prefix length (CP) on optical (OFDM) system is investigated. Although employing a CP as the guard interval is a simple way to combat inter-symbol interference (ISI) and inter-carrier interference (ICI), it reduces the transmission efficiency of the system. The simulation results show the effect of CP length in power receiver, penalty of power and improved the performance based on signal to noise ratio (SNR). In addition, a tradeoff is needed between reduced interference effects and transmission efficiency.

scholarly journals Pilot-based blind phase estimation for coherent optical OFDM system

2014 ◽  
Vol 22 (19) ◽  
pp. 22888 ◽  
Author(s):  
Xuebing Zhang ◽  
Jianping Li ◽  
Chao Li ◽  
Ming Luo ◽  
Haibo Li ◽  
...  
Keyword(s):  
Phase Estimation ◽  
Ofdm System ◽  
Optical Ofdm
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