Abstract
In this letter, a return-to-zero 8-star quadrature amplitude modulation (QAM) signal is generated for the first time by using a parallel I/Q modulator followed by an amplitude modulator with binary drive signals. Our experimental results verify the theoretically derived approximate bit-error rate and ring ratio optimization algorithm of the 8-star QAM. Decision-aided maximum likelihood phase estimation (PE) shows comparable performance with V&V Mth-power PE, but with much less computational complexity.
| Original language | English |
|---|---|
| Article number | 6327393 |
| Pages (from-to) | 2139-2142 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 24 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 7 Dec 2012 |
| Externally published | Yes |
Keywords
- Coherent optical communications
- modulation format
- phase estimation
- phase noise
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
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