Generation and Detection of 28 Gbaud Polarization Switched-QPSK in WDM Long-Haul Transmission Systems

Renaudier, Jérémie; Serena, Paolo; Bononi, A.; Salsi, M.; Bertran-Pardo, O.; Mardoyan, H.; Tran, P.; Dutisseuil, E.; Charlet, G.; Bigo, S.

doi:10.1109/jlt.2012.2185682

Cited by 22 publications

(17 citation statements)

References 18 publications

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“…Three of the bit streams were driven by uncorrelated (delayed) pseudo-random sequences, and the fourth was formed as a parity (exclusive OR, XOR) bit from these three sequences. This transmitter was also used by Renaudier et al [92], who also introduced a timing offset between the two polarizations to facilitate the receiver DSP, as will be discussed in section 2.5.2 below.…”

Section: Ps-qpskmentioning

confidence: 99%

“…M -SP-QAM According to predictions and simulations in, e.g., [57,59,61,92], the SP-QAM formats emerged as an interesting 4d format generalization with increased spectral efficiency over PM-QPSK. In 2013, 128-SP-QAM was demonstrated by three independent groups [104][105][106].…”

Section: Ps-qpskmentioning

confidence: 99%

“…However, for PS-QPSK it fails, due to an ambiguity making the cost function minimum nonunique. In addition, it requires the polarizations to be independently phase-tracked by two separate VV algorithms [92]. A number of ways to resolve this issue have been reported.…”

mentioning

confidence: 99%

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Multidimensional Optimized Optical Modulation Formats

Karlsson

Agrell

2016

Enabling Technologies for High Spectral‐Efficiency Coherent Optical Communication Networks

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Notice: Changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published source. Please note that access to the published version might require a subscription. Chalmers Publication Library (CPL) offers the possibility of retrieving research publications produced at Chalmers University of Technology. It covers all types of publications: articles, dissertations, licentiate theses, masters theses, conference papers, reports etc. Since 2006 it is the official tool for Chalmers official publication statistics. To ensure that Chalmers research results are disseminated as widely as possible, an Open Access Policy has been adopted. The CPL service is administrated and maintained by Chalmers Library.

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Section: Ps-qpskmentioning

confidence: 99%

Section: Ps-qpskmentioning

confidence: 99%

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Multidimensional Optimized Optical Modulation Formats

Karlsson

Agrell

2016

Enabling Technologies for High Spectral‐Efficiency Coherent Optical Communication Networks

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“…A short known header (448 bits) is looked for in the received sample sequence, and then used for an initial rough estimation of the frequency offset, in case of cold acquisition, i.e., at transmission start-up. 3 Once the first frequency estimation is available, it is possible to identify the transmitted symbol sequence and exploit the first transmitted code word to perform a fine frequency estimation (as concerns the simulated system). Both estimation steps are based on the algorithm in [31].…”

Section: Detailed Descriptionmentioning

confidence: 99%

Signal Overlap for Elastic Optical Networks

Foggi¹,

Cugini²

2016

J. Lightwave Technol.

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In Elastic Optical Networks (EONs), advanced transmission techniques based on coherent detection strategies have been proposed and exploited to provide high flexibility in resource allocation. So far, these techniques have assumed the constraint of each optical signal being transmitted along a dedicated frequency slot, by carefully avoiding frequency overlap with other optical signals.In this study, an overlap technique, that enables uncorrelated optical signals to be superimposed along the same spectrum resources, is designed and validated through simulations, both in terms of performance bounds and bit-error rate (BER) in coded transmissions. In particular, it is demonstrated how this technique allows each overlapped signal to be correctly received and detected. The proposed technique is less spectrally efficient and more complex to implement than increasing the constellation size and using non overlapping frequency slots, but it warrants consideration for flexible networking.The proposed technique is first theoretically detailed and justified. Then, networking scenarios and implementation schemes suitable for its effective utilization are identified and applied in the case of two overlapped 112 Gb/s polarization-multiplexed quadrature phase shift keying (PM-QPSK) signals. Simulation results show that, applying 3-dB optical signal-to-noise ratio margin on the achieved bounds, optical reaches of around 800 km can be successfully supported by the proposed overlap technique.

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“…Another option to achieve a finer granularity is the application of alternative modulation formats in four-dimensional (4D) signal space, which have recently received a lot of attention due to their interesting features. For instance, polarization-switched QPSK (PS-QPSK) was identified as the most power-efficient modulation format [7] in four dimensions and can be derived from PM-QPSK by using Ungerboeck's set-partitioning scheme [8] in four dimensions, where the minimum Euclidean distance between the constellation points is increased by 2 E1.76 dB after one partition [9,10]. Similarly, another popular four dimensional format 128-SP-QAM can be derived from PM-16QAM by set partitioning, i.e., a subset of M¼ 128 points out of 256 are chosen from the PM-16QAM constellation by increasing the minimum Euclidean distance [11].…”

Section: Introductionmentioning

confidence: 99%