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Linewidth-Tolerant and Low-Complexity Two-Stage Carrier Phase Estimation Using QPSK Constellation Transformation for 112 Gb/s PM 16-QAM Systems

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The performance of QPSK constellation transformation based two-stage carrier phase estimation algorithms is assessed for 16-ary quadrature-amplitude-modulation. Experimentally the linewidth tolerance of the algorithms is shown to be comparable to the blind phase search algorithm, but with a reduction in the hardware complexity by factors of about 3-8.

© 2012 Optical Society of America

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