Spectrally Efficient Long-Haul Optical Networking Using 112-Gb/s Polarization-Multiplexed 16-QAM

Winzer, Peter J.; Gnauck, A.H.; Doerr, C.R.; Magarini, Maurizio; Buhl, L.L.

doi:10.1109/jlt.2009.2031922

Cited by 323 publications

(123 citation statements)

References 24 publications

Supporting

Mentioning

119

Contrasting

Unclassified

Order By: Relevance

“…The non-data-aided frequency correction removed the frequency offset between the lasers [8] and a 20-symbol training sequence was employed to achieve symbol synchronization. Many algorithms have been developed for carrier phase recovery in digital coherent receiver including the least mean-squared (LMS) algorithm [1], decisiondirected phase-locked loop [9,10], decision-aided maximum likelihood phase estimation [11], blind phase search technique [12], and QPSK partitioning algorithm [13]. In this work, we developed a first order decision-directed phase-locked loop (DD-PLL) [9] as shown by the block diagram in Fig.…”

Section: Experiments Setupmentioning

confidence: 99%

Effects of phase noise of monolithic tunable laser on coherent communication systems

Huynh¹,

Smyth²,

Nguyen³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

Abstract:We investigate the effects of different phase noise processes of SGDBR laser on coherent systems. The SGDBR device operated well with QPSK modulation at 5 Gbaud, while the performance of 16-QAM was significantly degraded due to excess noise. The white FM noise mainly defines the ultimate performance of coherent reception, but the low frequency excess noise can potentially degrade the performance of systems that employ 16-QAM format at 5 Gbaud.

show abstract

Section: Experiments Setupmentioning

confidence: 99%

Effects of phase noise of monolithic tunable laser on coherent communication systems

Huynh¹,

Smyth²,

Nguyen³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

show abstract

“…This is particularly true for shorter links across the network, where the improved optical signal to noise ratio (OSNR) would allow the use of a higher capacity. One of the options to improve resource utilization in a static network is the deployment of spectrally efficient higher-order modulation formats enabled by digital coherent detection [2,3]. However, as attested by the rapid growth in reported constellation size [4][5][6], the optical hardware for a wide variety of coherently detected modulation formats is identical.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear penalties in long-haul optical networks employing dynamic transponders

Rafique¹,

Ellis²

2011

Opt. Express

View full text Add to dashboard Cite

Abstract:We report for the first time, the impact of cross phase modulation in WDM optical transport networks employing dynamic 28 Gbaud PMmQAM transponders (m = 4, 16, 64, 256). We demonstrate that if the order of QAM is adjusted to maximize the capacity of a given route, there may be a significant degradation in the transmission performance of existing traffic for a given dynamic network architecture. We further report that such degradations are correlated to the accumulated peak-to-average power ratio of the added traffic along a given path, and that managing this ratio through pre-distortion reduces the impact of adjusting the constellation size of neighboring channels.

show abstract

“…For QPSK, standard differential Viterbi-Viterbi and Viterbi-Viterbi fourth power law are applied for frequency offset and phase noise estimation, respectively [10]. While for 16-QAM, the frequency offset and phase noise estimation is based on the digital decision-directed phase locked loop [13].…”

Section: B Receiver's Dsp Proceduresmentioning

confidence: 99%

Nyquist-WDM With Low-Complexity Joint Matched Filtering and Adaptive Equalization

Zhu

Corcoran

Tran³

et al. 2014

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

Abstract-In this letter, we investigate the application of jointly processing the matched filtering and blind adaptive equalization functions in a receiver for a Nyquist wavelength division multiplexing (Nyquist-WDM) system employing a root-raised-cosine (RRC) pulse shaping filter. We show that blind equalization is able to also provide the matched filtering function, if the number of filter taps is increased. In addition, if implemented in the frequency domain, this form of blind equalization is more computationally efficient than when a separate RRC is used. It is also verified that this method is not sensitive to frequency offset. We demonstrate a 16-channel 19-GBd Nyquist-WDM system with QPSK and 16-quadrature-amplitude-modulation formats, and find the frequency domain blind equalizer can replace the RRC filter without adding a performance penalty.Index Terms-Coherent optical system, matched filtering, blind adaptive equalization, QPSK, 16-QAM.

show abstract

Spectrally Efficient Long-Haul Optical Networking Using 112-Gb/s Polarization-Multiplexed 16-QAM

Cited by 323 publications

References 24 publications

Effects of phase noise of monolithic tunable laser on coherent communication systems

Effects of phase noise of monolithic tunable laser on coherent communication systems

Nonlinear penalties in long-haul optical networks employing dynamic transponders

Nyquist-WDM With Low-Complexity Joint Matched Filtering and Adaptive Equalization

Contact Info

Product

Resources

About

Spectrally Efficient Long-Haul Optical Networking Using 112-Gb/s Polarization-Multiplexed 16-QAM

Cited by 323 publications

References 24 publications

Effects of phase noise of monolithic tunable laser on coherent communication systems

Effects of phase noise of monolithic tunable laser on coherent communication systems

Nonlinear penalties in long-haul optical networks employing dynamic transponders

Nyquist-WDM With Low-Complexity Joint Matched Filtering and Adaptive Equalization

Contact Info

Product

Resources

About

Nonlinear penalties in long-haul optical networks employing dynamic transponders