Enhancing the performance of 16384QAM based on delta-sigma modulation using geometric shaping in an IMDD system.
Opt Lett
; 48(20): 5253-5256, 2023 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-37831840
ABSTRACT
In this Letter, a new, to the best of our knowledge, geometric shaping method for an ultrahigh-order 16384-ary quadrature amplitude modulation (16384QAM) constellation based on the delta-sigma modulation technique is proposed. Based on the characteristics of delta-sigma modulation, the constellation was optimized to obtain greater constellation gain and improve the maximum performance of the system. Finally, the proposed scheme was demonstrated on an intensity-modulated direct detection (IMDD) system through a 25â
km single-mode fiber transmission. On performing experiments, it was found that the suggested approach increases the receiver sensitivity of ultrahigh-order QAM communication systems based on delta-sigma modulation by around 0.5â
dB and further enhances the error performance limit.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2023
Tipo de documento:
Article