Rate-Adaptive Modulation and Coding for Optical Fiber Transmission Systems

Gho, Gwang-Hyun; Kahn, Joseph M.

doi:10.1109/jlt.2012.2189435

Cited by 50 publications

(40 citation statements)

References 15 publications

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“…More importantly, experimental demonstration showed the feasibility and verified the effectiveness of a coordinated application of signal power control strategies and WA algorithms in a testbed. At increased OSNR values, flexible transponder [10] can operate with more bandwidth-efficient modulation formats and achieve higher throughput. The improved OSNR can thus help increase spectrum efficiency, especially in elastic optical networks, where the transmission bandwidth can be flexible.…”

Section: Resultsmentioning

confidence: 99%

Effects of signal power control strategies and wavelength assignment algorithms on circuit OSNR in WDM networks

et al. 2016

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Software-defined networking is enabling wavelength-division multiplexed (WDM) networks to be programmable down to individual components. While taking into account typical gain and noise figure profiles of erbium-doped fiber amplifier (EDFA) components, the authors consider a number of signal power control strategies and compare their performance in terms of achievable lightpath optical signal-to-noise ratio (OSNR). These strategies are applied network-wide to concurrently control the gain of each individual amplifier and the signal power equalization at each reconfigurable optical add/drop multiplexer. Simulation and (in part) experimental results show that the lightpath OSNR is affected by three factors: the EDFA gain control strategy, power equalization strategy and wavelength assignment (WA) algorithm. A trade-off between lightpath average OSNR and OSNR variance across the WDM channels is also noted. Experimental work is conducted using a five-node meshed WDM network testbed proving both feasibility and effectiveness of a coordinated use of signal power control strategies and WA algorithms.

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Section: Resultsmentioning

confidence: 99%

Effects of signal power control strategies and wavelength assignment algorithms on circuit OSNR in WDM networks

et al. 2016

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“…Beginning with a transceiver that exhibits a 3 dB SNR gap to the Shannon capacity that is improved to be an ideal Shannon capacity transceiver we calculate the data throughput of the three test topologies for the two coding gaps. In the case of the 3-node network and the DT network we calculate the upper bound for a fractional channel bandwidth assignment using the minimum cut technique, using equation (8) and also the actual maximum throughput based on an analytical solution for the 3-node linear network and an ILP multicommodity flow approach for the 9-node DT network. Figure 2 shows the maximum throughput for the three topologies as a function of the length scale.…”

Section: A Reduction Of Coding Gapmentioning

confidence: 99%

“…To maximize the data transmitted over a given light path the transceivers can use basic modulation format adaptation [2], 4D modulation schemes [3], time division hybrid formats [4], OFDM subcarrier modulation adaptation [5], probabilistic shaping [6], [7] and FEC overhead (OH) adaptation [8]- [11]. The adaptation of the optical launch power [12], [13] and mitigation of nonlinear interference using, for example digital back propagation (DBP) [14], [15], can improve the properties of the light path.…”

Section: Introductionmentioning

confidence: 99%

Throughput Gains From Adaptive Transceivers in Nonlinear Elastic Optical Networks

Ives

Alvarado

Savory

2017

J. Lightwave Technol.

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Abstract-In this paper we link the throughput gains, due to transceiver adaptation, in a point-to-point transmission link to the expected gains in a mesh network. We calculate the maximum network throughput for a given topology as we vary the length scale. We show that the expected gain in network throughput due to transceiver adaptation is equivalent to the gain in a point-to-point link with a length equal to the mean length of the optical paths across the minimum network cut. We also consider upper and lower bounds on the variation of the gain in network throughput due to transceiver adaptation where integer constrained channel bandwidth assignment and quantized adaptations are considered. This bounds the variability of results that can be expected and indicates why some networks can give apparently optimistic or pessimistic results. We confirm the results of previous authors that show finer quantization steps in the adaptive control lead to an increase in throughput since the mean loss of throughput per transceiver is reduced. Finally we consider the likely network advantage of digital nonlinear mitigation and show that a significant trade off occurs between the increase in SNR for larger mitigation bandwidths and the loss of throughput when routing fewer large bandwidth superchannels.

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“…In a more practical scenario, a rate-adaptive scheme [30] is proposed exploiting six combinations of binary LDPC and RS codes together with three modulation formats. This scheme was capable of operating within 2.9 and 3.9 dB from the AWGN capacity in long and short non-DM single-channel fiber-optic links, respectively, showing 50% increase in transparent reach compared to the rate-adaptive system introduced in [31] with hard-decision FEC.…”

Section: Introductionmentioning

confidence: 99%

Rate-Adaptive Coded Modulation for Fiber-Optic Communications

Beygi

Agrell

Kahn

et al. 2014

J. Lightwave Technol.

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Abstract-Rate-adaptive optical transceivers can play an important role in exploiting the available resources in dynamic optical networks, in which different links yield different signal qualities. We study rate-adaptive joint coding and modulation, often called coded modulation (CM), addressing non-dispersion-managed (non-DM) links, exploiting recent advances in channel modeling of these links. We introduce a four-dimensional CM scheme, which shows a better tradeoff between digital signal processing complexity and transparent reach than existing methods. We construct a rate-adaptive CM scheme combining a single low-density paritycheck code with a family of three signal constellations and using probabilistic signal shaping. We evaluate the performance of the proposed CM scheme for single-channel transmission through long-haul non-DM fiber-optic systems with electronic chromaticdispersion compensation. The numerical results demonstrate improvement of spectral efficiency over a wide range of transparent reaches, an improvement over 1 dB compared to existing methods.Index Terms-Fiber-optic communications, four-dimensional set partitioning, non-dispersion managed links, nonlinear channel model, probabilistic shaping, rate-adaptive coded modulation.

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Rate-Adaptive Modulation and Coding for Optical Fiber Transmission Systems

Cited by 50 publications

References 15 publications

Effects of signal power control strategies and wavelength assignment algorithms on circuit OSNR in WDM networks

Effects of signal power control strategies and wavelength assignment algorithms on circuit OSNR in WDM networks

Throughput Gains From Adaptive Transceivers in Nonlinear Elastic Optical Networks

Rate-Adaptive Coded Modulation for Fiber-Optic Communications

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