Performance analysis of blind timing phase estimators for digital coherent receivers

Huang, Lingchen; Wang, Dawei; Lau, Alan Pak Tao; Lu, Chao; He, Sailing

doi:10.1364/oe.22.006749

Cited by 29 publications

(23 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Next, the signals are match-filtered and resampled to 20 GS/s. After clock recovery with Godard's method [11], the signals are launched into the proposed MFI block for modulation format recognition. The modulation format information extracted from the received signal is then used to select the proper subsequent DSP blocks.…”

Section: Resultsmentioning

confidence: 99%

Blind modulation format identification using nonlinear power transformation

et al. 2017

View full text Add to dashboard Cite

This paper proposes and experimentally demonstrates a blind modulation format identification (MFI) method delivering high accuracy (> 99%) even in a low OSNR regime (< 10 dB). By using nonlinear power transformation and peak detection, the proposed MFI can recognize whether the signal modulation format is BPSK, QPSK, 8-PSK or 16-QAM. Experimental results demonstrate that the proposed MFI can achieve a successful identification rate as high as 99% when the incoming signal OSNR is 7 dB. Key parameters, such as FFT length and laser phase noise tolerance of the proposed method, have been characterized.

show abstract

Section: Resultsmentioning

confidence: 99%

Blind modulation format identification using nonlinear power transformation

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Our approach allows operators to take advantage of the margin to increase the capacity of their links and improve their return on investment (ROI). The method is generic and can be applied to other detectors, shown in [30], where edge frequencies are used as part of clock recovery.…”

Section: Discussionmentioning

confidence: 99%

Adaptive Coherent Receiver Settings for Optimum Channel Spacing in Gridless Optical Networks

et al. 2019

View full text Add to dashboard Cite

In this paper, we propose a novel circuit and system to optimize the spacing between optical channels in gridless (also called flexible-grid or elastic) networking. The method will exploit the beginning-of-life link margin by enabling the channel to operate in super-Nyquist dense wavelength division multiplexing mode. We present the work in the context of software-defined networking and high-speed optical flexible-rate transponders. The clock recovery scheme allows the mitigation of jitter by decoupling the contribution of high-jitter noise sources from the clock recovery loop. The method and associated algorithm are experimentally verified where a spectrum gain of up to 2 GHz in spacing between two channels in the Media Channel (MC) is obtained compared to conventional clocking strategies. We showed that the improvement is equivalent to increasing throughput, in a data-center interconnect scenario, by up to 300 giga-bits per second per route.

show abstract

“…Timing jitter can be calculated from the statistics of the zero crossing of the s-curve (see Figure 7) [7,18]. This can be achieved in four steps.…”

Section: Comparison Of the Modified Godard Algorithm To The Gardner Amentioning

confidence: 99%

Modified Godard Timing Recovery for Non Integer Oversampling Receivers

et al. 2017

View full text Add to dashboard Cite

Abstract:A timing recovery algorithm is introduced that operates with less than two samples per symbol and provides an enormous complexity reduction. The complexity reduction is due to a synergy with the already existing Fourier transforms in a coherent receiver, an avoidance of terms that are dominated by noise, and a complete elimination of multiplications. A simulation and an experiment with a single carrier modulation format show that the inherent timing jitter is, despite of the significant complexity reduction, comparable with the state of the art, and in particular outperforms the Godard algorithm for low roll-off factors. In addition, it is one of the few algorithms that operates with less than two samples per symbol in the frequency domain, and thus enables the lowest complexity in a receiver.

show abstract

Performance analysis of blind timing phase estimators for digital coherent receivers

Cited by 29 publications

References 17 publications

Blind modulation format identification using nonlinear power transformation

Blind modulation format identification using nonlinear power transformation

Adaptive Coherent Receiver Settings for Optimum Channel Spacing in Gridless Optical Networks

Modified Godard Timing Recovery for Non Integer Oversampling Receivers

Contact Info

Product

Resources

About