Phase noise tolerant carrier recovery scheme for 28 Gbaud circular 16QAM

Navarro, Jaime Rodrigo; Olmedo, Miguel Iglesias; Kakkar, Aditya; Pang, Xiaodan; Ozoliņš, Oskars; Schatz, Richard; Jacobsen, Gunnar; Popov, Sergei; Zibar, Darko

doi:10.1109/ecoc.2015.7341657

Cited by 2 publications

(1 citation statement)

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“…Due to its particular shape, circular multilevel quadrature amplitude modulation (C-mQAM) constellations provide a higher phase noise tolerance compared to Sq-QAM constellations. The n-PSK partitioning CPR scheme for C-mQAM constellations proposed in [13,14] achieves a relatively high linewidth tolerance with a low computational complexity. However, the algorithm requires a priori amplitude discrimination for symbol classification, which undermines its performance at low optical signal-to-noise ratios (OSNRs).…”

Section: Two-stage N-psk Partitioning Scheme For C-mqammentioning

confidence: 99%

Two-Stage n-PSK Partitioning Carrier Phase Recovery Scheme for Circular mQAM Coherent Optical Systems

Navarro¹,

Kakkar

Pang³

et al. 2016

Photonics

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A novel two-stage n-PSK partitioning carrier phase recovery (CPR) scheme for circular multilevel quadrature amplitude modulation (C-mQAM) constellations is presented. The first stage of the algorithm provides an initial rough estimation of the received constellation, which is utilized in the second stage for CPR. The performance of the proposed algorithm is studied through extensive simulations at the forward error correction bit error rate targets of 3.8ˆ10´3 and 1ˆ10´2 and is compared with different CPR algorithms. A significant improvement in the combined linewidth symbol duration product (∆νT s ) tolerance is achieved compared to the single-stage n-PSK partitioning scheme. Superior performance in the ∆νT s tolerance compared to the blind phase search algorithm is also reported. The relative improvements with respect to other CPR schemes are also validated experimentally for a 28-Gbaud C-16QAM back-to-back transmission system. The computational complexity of the proposed CPR scheme is studied, and reduction factors of 24.5 | 30.1 and 59.1 | 63.3 are achieved for C-16QAM and C-64QAM, respectively, compared to single-stage BPS in the form of multipliers | adders.

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Section: Two-stage N-psk Partitioning Scheme For C-mqammentioning

confidence: 99%