Archivio Istituzionale della RicercaIn this letter, a novel two-stage digital feed forward carrier recovery algorithm for 64-ary quadrature amplitude modulation (QAM) is proposed and analyzed. Due to the absence of any feedback loop, the approach shows a high tolerance toward laser phase noise. Different steps involving partition, selection, and rotation of symbols are also discussed. For an OSNR penalty of 1 dB at bit error rate of 10-3, the proposed scheme can tolerate linewidth times symbol duration product equal to 3.3×10-5 and hence can be used with the commercially available state-of-the-art tunable lasers for 64-QAM transmission at 400 Gb/s.
Dual Stage CPE for 64-QAM Optical Systems Based on a Modified QPSK-Partitioning Algorithm / Syed Muhammad, Bilal; Carena, Andrea; Chris, Fludger; Bosco, Gabriella. - In: IEEE PHOTONICS TECHNOLOGY LETTERS. - ISSN 1041-1135. - STAMPA. - 26:3(2014), pp. 267-270. [10.1109/LPT.2013.2292553]
Dual Stage CPE for 64-QAM Optical Systems Based on a Modified QPSK-Partitioning Algorithm
CARENA, Andrea;BOSCO, GABRIELLA
2014
Abstract
In this letter, a novel two-stage digital feed forward carrier recovery algorithm for 64-ary quadrature amplitude modulation (QAM) is proposed and analyzed. Due to the absence of any feedback loop, the approach shows a high tolerance toward laser phase noise. Different steps involving partition, selection, and rotation of symbols are also discussed. For an OSNR penalty of 1 dB at bit error rate of 10-3, the proposed scheme can tolerate linewidth times symbol duration product equal to 3.3×10-5 and hence can be used with the commercially available state-of-the-art tunable lasers for 64-QAM transmission at 400 Gb/s.
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https://hdl.handle.net/11583/2541911
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