Abstract
Frequency offset estimation is a key function in carrier phase recovery to enable digital coherent reception. We propose a novel, feed-forward, dual-stage frequency offset estimator, and demonstrate its performance through both simulation and experiment. Our simulation results show that the estimation range can be as large as ±9 GHz for a 10.7-GBaud polarization-multiplexed (PolMux) quadrature phase-shift keying (QPSK) system. In addition, the widest range of ±0.5 times the system symbol rate is achieved for the first time in an experimental 42.8-Gb/s coherent PolMux QPSK receiver.
Original language | English (US) |
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Article number | 5401069 |
Pages (from-to) | 401-403 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 22 |
Issue number | 6 |
DOIs | |
State | Published - Mar 15 2010 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Keywords
- Coherent optical communication
- Frequency offset
- Timing recovery