Answers are grounded in this paper and cite their sources.
The laser linewidth tolerance for 16-ary quadrature amplitude modulation (16-QAM) coherent optical systems is investigated using a quaternary phase-shift-keying (QPSK) partition scheme. The different stages needed to partition the square-16-QAM into QPSK constellations for carrier phase estimation are discussed. It is shown that at 1 dB above sensitivity at a bit-error rate of 10-3, a combined linewidths symbol duration product of 1 × 10-4is tolerable. The performance of the algorithm with different bits resolution in the analog-to-digital converter is also presented.
No takes yet. Share an insight, caveat, or question.
Fatadin et al. (2010) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: