Figure 4 - uploaded by Mohammed Jalal AbdulRazzaq
Content may be subject to copyright.
CO-OFDM Receiver block diagram Table (3): Parameters of the LD Parameter Value Frequency 193.1 THz power 0 dBm Line width 0.1 MHz Initial phase 0
Source publication
Coherent optical orthogonal frequency division
multiplexing (CO-OFDM) system with dense wavelength
division multiplexing (WDM) was analyzed to reach high data
rates of 1.60 Tb/s over 4500 km single mode fiber (SMF).
1.60Tb/s signal was generated by multiplexing 16 OFDM
signals with 100 Gb/s for each signal. The system performance
has been studied b...
Similar publications
Four-wave mixing (FWM) is an important nonlinear phenomenon limiting the performance of optical fiber networks. In this paper, a comparative analysis of the FWM impact on the network performance of long-haul dense/ultra-dense wavelength division multiplexing
(DWDM/UDWDM) optical communication systems using standard single mode fibers (SSMFs) and no...
Citations
... The proposed system successes to transmit data up to 6600 km rather than that proposed by Alatawi [17]which was 6000 km, using 16-QAM compared to alatawei he had used 4-QAM.We achieve higher data rate up to 1.65 Tbps while in khaled alatwi the maximum rate was 1Tbps. Also, the proposed system outperforms the results conducted by Dr. Sinan M. Abdul [14]which was attained a data rate 1.6 Tbps but with shorter transmission length of 4500 km. ...
... The 8-WDM system's optimum input power was between -8dBm and -4dBm[13]. Sinan M. Abdul Satar, in 2015 investigate the use of a (CO-OFDM) system with (DWDM) and the achievement of 1.60 Tb/s data rates over a 4500 km SMF by multiplexing 16 CO-OFDM signals, each of 100 Gb/s[14]. According toPawar and Umbardand in 2016), a rate of 100Gb/s for fiber length of 360 km using (SMF), can be achieved when (CO-OFDM) combined with Dual -Polarization Quadrature Phase Shift Keying (DP-QPSK) modulation[15]. ...
Demanding extra Bandwidth and high data rates has been meet by the integration both of wired and wireless communication systems. For that the Radio over Fiber (RoF) technology has gained a traction. In this article a Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) is proposed as the main wired system for transmitting data at high rates suffers from the polarization mode dispersion and chromatic dispersion of the optical channel which mitigates the data rates. Thus, to combat these limitations a Desperation Compensation Fiber (DCF) which adds negative attenuation to the optical signals transmitted in optical fiber is suggested. Moreover, the addition of Wavelength- Division- Multiplexing (WDM) to the system of transmission provides better bandwidth saving, high data rates, and better spectral efficiency, and power utilization. The efficiency of high data rate CO-OFDM integrated with RoF for long haul transmission between 100km and 450km with data rates up to 10 Gbps have been investigated in this article with SMF-DCF with 16 DPSK and 16-QAM modulations schemes
respectively. The simulation results showed that the proposed system can achieve a high data rate up to 55 Gbps but when integrated with WDM, with a fiber link length can be increased to up to 6600 kilometers, with highest data rate up to 1.65 Tbps.
... Among all modulation methods, the preferred digital modulation technique is the binary ASK which also named on-off keying (OOK)) owing to simplicity. In the binary ASK, the power signal may be transferred between two levels [21], where the lower one characterizes a 0 bit whereas 1 bit represents a higher level. ...
The use of optical-OFDM systems is mainly restricted by their limited dynamic range as a result of a high peak to average power ratio (PAPR) and nonlinear distortion (NLD). Radio-over-Fiber (RoF) systems are mainly deployed for light modulation and mm-wave signals transmission over fiber links. This paper evaluated the performance of RoF links with respect to their external modulation in a bid to highlight the challenges attributable to the various optical system components. The Mach-Zehnder Modulator (MZM) have been used in external modulation; it is a tested modulation scheme for quadrature amplitude modulation QAM (a vector modulation format) where signal subcarriers are generated using an OFDM scheme. Simulation results based on Optisystem 13 software exposes that the receiver performance of the optimum system for achieving has a better Bit Error Rate (BER) and three longest distance as 10, 50, 100 km for 16 QAM-OFDM-RoF system are reached by using optimum receiver launch power.
... Wireless network based on radio over-fiber technologies is a very beneficial solution. It acts as a back-end technology for the transportation of microwave and millimeter waves [9]. Integration of WDM with RoF leads to significant increase in the coverage area and the overall capacity of the current optical network, also to exploit the benefits of high data rate and increase mobility. ...
span>The optical communication and wireless networks can be integrated to increase the capacity and mobility with decrease the costs in the access networks. Optical communication is considered a Fiber optic communication that can be used for wired and wireless communication. The problems of Fiber optic communication have a solution represented by Radio over fiber (RoF) which can control many base stations (BSs) that connect to a central station (CS) with an optical fiber. The Coherent optical OFDM (CO-OFDM) have concerned a great interest due to the high spectral efficiency and strength to the fiber dispersion, also it can be considered as a promising candidate when used in long haul optical fiber transmission systems. The integration of the wavelength division multiplexing system (WDM) with (CO-OFDM) system for increasing the system performance as well as achieving high data rates. The simulation of WDM-ROF and (WDM-CO-OFDM) with an optisystem simulator to analyze the RF spectrum, spectrum signal visualizers, and constellation diagrams. The proposed of integration of WDM and RoF-OFDM system is to achieve 100 km fiber length using 4QAM sequence bit, and the received power with electrical and optical amplifications by using 10 Gbps data signal.</span
... Optical OFDM was recommended as a remarkable modulation scheme for high data systems either in Direct Detection (DD) [4,5] or coherent detection [6]. The ''Coherent optical orthogonal frequency-division multiplexing (CO-OFDM)'' has been broadly examined due to its favorable circumstances such as flexible bandwidth scalability and allocation, low required sampling rates and high spectral efficiencies [7]. Rend THEORY The propagation of the fundamental mode in single one polarization state is called the single polarization. ...
... Optical OFDM (O-OFDM) was proposed as an striking modulation scheme for long-haul transmission either in or in direct detection or coherent detection [4]. The Coherent optical (CO-OFDM) has been widely studied because of its advantages such as low required sampling rates, high spectral efficiencies, and flexible bandwidth allocation and scalability [5]. ...
... In this work the cyclic prefix of 1/4 has best effective area at 140 µm 2 as it has the lower value of BER, at the cyclic prefix of 1/8 the best value of E.A. is 150 µm 2 , at 1/16 the best value is 120 µm 2 and at 1/32 is 150 µm 2 , as shown in figure (4). The same process is repeated for the values of cyclic prefix of 1/64, 1/128, 1/256 where the best is 150 µm 2 , as in figure (5). All these results are shown in Table (2). ...
... The effects of varying effective area of the optical fiber were observed through the BER (Bit Error rate) factor for a Dual polarization optical OFDM system. Figures (4,5) presents the BER in terms of cyclic prefix for the Optical OFDM with different size of CP. According to Figure (4,d), our results by using higher value of effective area of 150 µm 2 achieves sufficiently lower BER, this means when the effective area increased, it was seen that the Bit Error Rate decreases with increasing signal to noise ratio. ...
BACKGROUND: The internet traffic growth led to increase in demand for high data rates and bandwidth. The Optical Orthogonal Frequency Division Multiplexing (O-OFDM) has been considered as an enthusiastic topic of research today. OFDM is a multi-carrier-modulation (MCM) which is considered as a special case of FDM technology. OBJECTIVE: Dual polarization Optical OFDM system is computer-generated with Optisystem V14.0 program. This paper provides an investigation of dual polarization O-OFDM system using different values of effective area of the optical fiber and observes its effect on the bit error rate of the system, on the other hand using cyclic prefix length to eliminate the effect of ICI and ISI. RESULTS: The best transmission performance (best BER) at a length of 1000Km of optical fiber of the system is at an effective area of 150 µm 2 and at a cyclic prefix of 1/32 (3.125%). CONCLUSION: As the effective area increased the system achieves the best BER.
... Optical OFDM was recommended as a remarkable modulation scheme for high data systems either in Direct Detection (DD) [4,5] or coherent detection [6]. The ''Coherent optical orthogonal frequency-division multiplexing (CO-OFDM)'' has been broadly examined due to its favorable circumstances such as flexible bandwidth scalability and allocation, low required sampling rates and high spectral efficiencies [7]. Rend THEORY The propagation of the fundamental mode in single one polarization state is called the single polarization. ...
OFDM is a multi-carrier-modulation (MCM) which is deliberated as a special case of FDM technology. Single polarization fibers means that the fundamental mode propagate in only one polarization state. Single polarization Optical OFDM system is simulated with Opti-system V14.0 program. ''Coherent optical orthogonal frequency division multiplexing (CO-OFDM)'' system with different effective area and cyclic prefix length was investigated to reach high data rates with long distance by using single mode fiber (SMF). The performance of the system has been deliberated by calculating signal to noise ratio (SNR), bit error rate (BER) and optical signal to noise ratio (OSNR), it was found that as the effective area increase, the BER decreases. The optimal value is at a BER of 75*10-6 where the cyclic prefix is at 1/16 (6.25%) and the used effective area is 150 µm 2 .
