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Quadrature Duobinary Modulation and Detection

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Abstract

We investigate the performance of quadrature-duobinary (QDB) modulation with both maximum-likelihood-sequence-estimation and symbol-by-symbol detection and show that QDB can achieve better performance than 8-ary quadrature-amplitude modulation (8QAM) and 16QAM at a 4-b/s/Hz spectral efficiency.

© 2015 Optical Society of America

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