Abstract
We propose two phase estimation methods for coherent optical orthogonal frequency-division multiplexing (OFDM) systems, the decision-aided (DA) plus pilot-aided (PA) scheme and DA plus decision feedback (DF) scheme. We further investigate the combinations of DA, PA, and DF in a simulated 40-Gb/s single polarization system. DA+PA helps to increase the phase noise tolerance of DA and reduce the overhead of PA, while DA+DF reduces the overhead to zero and achieves the best performance with one more step of estimation, compensation, and demodulation.
| Original language | English |
|---|---|
| Article number | 6316081 |
| Pages (from-to) | 2067-2069 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 24 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 26 Nov 2012 |
| Externally published | Yes |
Keywords
- Coherent
- laser phase noise
- orthogonal frequency-division multiplexing (OFDM)
- phase estimation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering