Abstract
Optical communication networks (OCNs) provide promising and cost-effective support for the ultra-fast broadband solutions, thus enabling them to address the ever growing demands of telecommunication industry such as high capacity and end users’ data rate. OCNs are used in both wired and wireless access networks as they offer many advantages over conventional copper wire transmission such as low power consumption, low cost, ultra-high bandwidth, and high transmission rates. Channel effects caused by light propagation through the fiber limits the performance, hence the data rate of the overall transmission. To achieve the maximum performance gain in terms of transmission rate through the OCN, an optical downlink system is investigated in this paper using feed forward equalizer (FFE) along with decision feedback equalizer (DFE). The simulation results show that the proposed technique plays a key role in dispersion mitigation in multi-channel optical transmission to uphold multi-Gb/s transmission. Moreover, bit error rate (BER) and quality factor (Q-factor) below 10 − 5 and above 5, respectively, are achieved with electrical domain equalizers for the OCN in the presence of multiple distortion effects showing the effectiveness of the proposed adaptive equalization techniques.
Highlights
Multi-signal transmission over a single physical channel is considered a major breakthrough in telecommunications technologies [1], to transport multiple user signals with different modulation formats, data rate, and applications
Systems because different wavelengths travel through the same fiber, the long-haul transmission gives rise to the accumulated chromatic dispersion (CD) in a wavelength-dependent setup [4], which can be compensated by using slope compensation; it causes an increase in nonlinear distortions[5]
Due to inter symbol interference (ISI) and spectral extension in the transmitted optical pulses caused by the channel effects in Optical communication networks (OCNs), nullifying the effects of CD and PMD have been topics of great interest for the researchers
Summary
Multi-signal transmission over a single physical channel is considered a major breakthrough in telecommunications technologies [1], to transport multiple user signals with different modulation formats, data rate, and applications. Recent developments in mobile broadband services have resulted in a surge of users data traffic, which has, in turn, posed a challenge to provide a low-cost and ultra-high capacity solution for the backbone network [1,2]. For this reason, optical communication networks (OCNs) have been of great interest to the researchers for the past few decades, as optical fibers provide wide bandwidth and are cost effective. To mitigate the distortion effects caused due to the spectral extensions in the transmitted optical pulses from CD and PMD, various techniques such as optical compensation technique and electronic compensation procedure have been studied previously [5].
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