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1.05 Tb/s Optical-OFDM Using ROF over 3600 km

Optics and Photonics Journal 2013年第5期3卷 318-323页

作者： fahad almasoudi Khaled Alatawi Mohammad A. Matin Department of Electrical and Computer Engineering University of Denver Denver USA

In this paper, an effort is made to analyze the integration of direct detection optical orthogonal frequency division multiplexing (DDO-OFDM) with wavelength division multiplexing (WDM) to reach high data rates of 1.050 Tb/s over 3600 km single mode fiber (SMF). The 1.050 Tb/s signal is generated by multiplexing 30 OFDM signals with 35 Gb/s for each OFDM. The performance of the system is studied by measuring the optical signal to noise ratio (OSNR) of each WDM channel;signal to noise ratio (SNR);and bit error rate (BER);while analyzing the constellation diagram of all users. Also, the relationship between the OSNR and BER is studied and it is noticed that as the OSNR increased, the BER decreased. As can be seen form the results, as the transmission distance increased the BER increases and to keep the BER less than 10-3 we need to increase the OSNR.

关键词： BER O-OFDM DCF ICI ISI

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Performance Study of 1 Tbits/s WDM Coherent Optical OFDM System

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Optics and Photonics Journal 2013年第5期3卷 330-335页

作者： Khaled Alatawi fahad almasoudi Mohammad A. Matin Department of Electrical and Computer Engineering University of Denver Denver USA

This paper investigates the architecture of Tbits/s Wavelength Division Multiplexing (WDM) system by using a Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) with 4-QAM for long haul transmissions of 1800 Km SM. A simulation of 20 WDM channels spaced at 50 GHz, and 20 OFDM signals each with 50 Gbits/s bitrate to produce data rate of 1 Tbits/s is built. The system performance is studied by observing the constellation diagram of the signal and the relationship of BER and OSNR with regard to transmission distance. The results show that the BER increases as the transmission distance increases. Also, as the transmission distance increases, the OSNR needs to be increased to maintain BER in less than 10-3.

关键词： WDM QAM CO-OFDM BER OSNR

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Study of OFDM Technique on RoF Passive Optical Network

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Optics and Photonics Journal 2013年第2期3卷 217-224页

作者： fahad almasoudi Khaled Alatawi Mohammad A. Matin Department Electrical and Computer Engineering University of Denver Denver USA

The combination of radio over fiber (RoF) and orthogonal frequency division multiplexing (OFDM) techniques has resulted in a high-data-rate at lower cost in the last mile of wireless networks. This paper investigates the use of the OFDM as a modulation technique for radio over fiber (RoF) in passive optical network (PON). A laser source of 1550 nm wavelength was used with 100 km, 140 km and 288 km single mode fiber. In the OFDM-PON a passive optical splitter of ratio 1:2 is used to connect two optical network units (ONUs). A 10 Gbits/sec transmission bit rate is used to simulate the RoF-OFDM-PON system. The proposed system can provide a flexible, cost effective and significant high data rate.

关键词： OFDM RoF PON ONU RoF-OFDM ISI ICI QAM

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Design of Broadband RoF PON for the Last Mile

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Communications and Network 2012年第4期4卷 269-277页

作者： Ayoob Alateeq Khaled Alatawi fahad almasoudi Mohammad A. Matin Department Electrical and Computer Engineering University of Denver Denver USA

An increase in the demand of broadband service has encouraged research and study to find a solution to offer an adequate amount of service. Living in this digital world with downloading video, voice or data leads us occasionally to have a shortage of bandwidth in the provided data. One of the solutions to cover the huge expected demand in the future is improving the communication systems by adding optical passive components to the Radio over Fiber (RoF) system. This work is mainly to increase the bandwidth that allows the small and single consumer at the last mile. We have shown that by adding the 40-GHz mm-wave to the system, Bit-Error-Rate (BER) has increased while Q-factor has decreased.

关键词： WDM-PON MM-Wave Radio RoF Q-Factor BER

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