Orthogonal frequency-division multiplexing in wireless communication systems with multimode fiber feeds

Dixon, Barbara; Pollard, R.D.; Iezekiel, Stavros

doi:10.1109/22.939920

Cited by 60 publications

(24 citation statements)

References 11 publications

(9 reference statements)

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“…The problem of dispersion can be compensated by inserting an element that imposes dispersion on the optical signal that is opposite (negative) to that imposed by optical fiber [1,[21][22]. Most common is the use of Dispersion Compensation Fiber (DCF) having strong negative dispersion placed at regular intervals along the link [8]. It can actually reverse the effects of dispersion suffered by 1550 nm signals that traverse standard single-mode fiber.…”

Section: B Dispersion Compensation Techniquesmentioning

confidence: 99%

Performance Analysis of Optical Communication Systems using OFDM by Employing QPSK Modulation

K.¹

2015

IJRITCC

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-The high data rate along with good Quality of Service (QoS) requirements of Next Generation Network (NGN) can be fulfilled by using the optical fiber communication networks. At high data rate, dispersion will be the limiting factor which needs to be suitably compensated. Many efforts have been drawn to the development of dispersion compensating devices / techniques to recover or prevent the broadening signal pulse. The Orthogonal Frequency Division Multiplexing (OFDM) is very attractive because of its capacity to handle the dispersion causing pulse broadening at the receiver without changing the internal architecture of the system. Thus Integration of Optical Communication Systems with OFDM system appears to be the most suitable technology for the NGN. The work presented here consist of the design, simulation and performance evaluation for the dispersion compensation in optical fiber communication systems using OFDM for high data rate transmission by utilizing the capacity of the optical fiber channel efficiently. The system performance has been analyzed and compared it with the single carrier optical communication systems. Various simulation results show that systems using OFDM can give dynamically tunable compensation of the dispersion by changing the various parameters of the OFDM systems. The work presented here reveals that the use of OFDM can be used to construct cost effective, high data capacity optical communication systems with extended transmission distance by employing dispersion compensation. These systems have the ability of supporting data rate up to 40 Gbps per optical channel and are appropriate for implementation as upgraded long haul high data rate optical Communication systems.

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Section: B Dispersion Compensation Techniquesmentioning

confidence: 99%

Performance Analysis of Optical Communication Systems using OFDM by Employing QPSK Modulation

K.¹

2015

IJRITCC

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“…Because of the different restriction it was not executed for the different utilities, even though got patent in 1070.In 1990 Cioffi et al [33][34][35] at Stanford University implemented the same in the wire line protocol ADSL. Latter, Dixon et al suggested its utility for mitigating dispersion in optical fiber [8]. The OFDM resilience to the dispersionpermits high data rate transmission;thereby it is recommended for the next generation networks in dispersive environments [14].…”

Section: Orthogonal Frequency Division Multiplexingmentioning

confidence: 99%

“…It is a simple way to compensate for dispersion to cancel the accumulated dispersion after a certain distance by mean of the dispersion compensating fibre. In this scheme a suitable length of the dispersion compensation fiber having strong negative dispersion [8], placed at regular intervals along the link usually at the optical amplifier points, typically at 80-130 km. Mcnicol and Killey [21,22] suggested that interest in electronic dispersion compensationis rising due to its adaptability to any optical fiber communication system, including dynamically-switched optical networks, so reduces engineering and inventory costs.…”

Section: Dispersion Compensation Techniquesmentioning

confidence: 99%

Critical Analysis of Dispersion Compensated Optical Communication System

Sethi¹,

Goel²

2015

IJCA

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Next generation communication systems need to dispense higher data rate in the efficient manner with capability to customize according to the dynamic data transfer framework in an economically dominant approach. The optical fiber communication networks fulfill these requirements along with small attenuation loss and better quality of services. In the last a few years the rapid progress of the data rate transmission over the existing optical transmission networks accentuated the need of more worthwhile usage of the transmission capacity of the prevailing networks. The forthcoming optical communication systems needs to support 10 Gbps and above over the single wavelength in the optical fiber channel.The Inter-Symbol Interference (ISI) due to dispersion limits the repeater less maximum transmission data rate and maximum transmission distance for the optical fiber channel [1]. Various endeavors have been taken for the advancement of the schemes and dispersion compensation devices to mitigate the effect of the dispersion causing inter-symbol interference.The primary instrument to achieve this objective is to use an equalizer. Orthogonal Frequency Division Multiplexing (OFDM) is a very favorable scheme for the high data rate data transmission because of its ability to overcome the effect of the dispersion, tolerance to the dispersive channel, high spectrum efficiency and better flexibility of operation. For mitigating dispersion impact OFDM transmits a large number of modulated sub-carriers at the same time operating at low data rate. These cause the symbol period relatively longer than the channel impulse response, hence mitigating the impact of inter-symbol interference. OFDM is a multicarrier modulation scheme, extensively investigated and deployed in wireless as well as wire line communication. It is getting increased interest in the fiber optic research community for its robustness against dispersion causing inter-symbol interference. It utilizes the spectrum efficiently and dynamically controls the dispersion. This suggest that OFDM can be the best method for the mitigating the dispersion for the long distance high data rate optical fiber communication systems. Therefore, the integration of OFDM with the optical fiber can be the excellent scheme for providing long distance high data rate efficiently. A comparative performance analysis of the dispersion compensated optical system carried out for examining the impact of the OFDM to mitigate the dispersion at 10 Gbps and above. The systems with and without using OFDM has been configured and its performance has been investigated,various results obtained exhibited that transmission performance is entirely dependent upon a proper selection of data rate, transmission length, and modulation schemes etc. For evaluating the systems performance, constellation and bit error rate are evaluated for system with and without using OFDM and subsequently compared.The various results of the investigation depicts that for high data capacity transmission for the long distance...

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“…In ROF, COFDM impact has been demonstrated with MMF as a promising modulation scheme for mitigating the modal dispersion penalty [6]. By implementing coding and interleaving across sub-carriers, the effect of multipath fading is minimised since interleaving reorganises the number of bits in a way so as to avoid the effects of fading.…”

Section: Introductionmentioning

confidence: 99%