Name
Title | ||
|---|---|---|
New metric for <Emphasis Type="Italic">IQ</Emphasis> imbalance compensation in optical QPSK coherent systems |
Abstract | ||
|---|---|---|
We report on a simple alternative method for the compensation of quadrature imbalance in optical quadrature phase-shift-keying (QPSK) coherent systems. By introducing a new metric, the phase imbalance can be determined and compensated. The proposed method is theoretically and numerically analyzed. In particular, it is shown that the method exhibits a small bias of estimated phase imbalance value. Thanks to its deterministic property, this bias can be simply compensated by incorporating at the receiver a phase rotator (or phase shift) whose value can be determined based on an analytical analysis. Moreover, the algorithm is also experimentally validated through bit-error-rate and error vector magnitude (EVM) measurements. A good agreement on the performance of the proposed method with that of the Gram–Schmidt orthogonalization procedure is shown in a 20-Gbit/s optical QPSK experiment. The robustness of both methods was verified with up to \(30^\circ \) phase imbalance by comparing the signal with and without phase imbalance compensation. A 10% reduction in EVM is achieved with our method for a high phase imbalance of \(30^\circ \), while the implementation complexity can be reduced owing to the suppression of the use of square-root operators. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1007/s11107-018-0783-7 | Photonic Network Communications |
Keywords | Field | DocType |
Coherent communications, Fiber optical communications, IQ imbalance, Modulation | IQ imbalance,Computer science,Algorithm,Robustness (computer science),Modulation,Operator (computer programming),Quadrature (mathematics),Orthogonalization,Phase (waves),Distributed computing,Phase-shift keying | Journal |
Volume | Issue | ISSN |
36 | 3 | 1572-8188 |
Citations | PageRank | References |
0 | 0.34 | 7 |
Authors | ||
9 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Trung-Hien Nguyen | 1 | 0 | 0.68 |
| Pascal Scalart | 2 | 925 | 283.73 |
| Mathilde Gay | 3 | 1 | 1.16 |
| Laurent Bramerie | 4 | 3 | 4.51 |
| Christophe Peucheret | 5 | 5 | 8.02 |
| Fausto Gomez-Agis | 6 | 0 | 1.01 |
| Olivier Sentieys | 7 | 597 | 73.35 |
| Jean-claude Simon | 8 | 30 | 4.89 |
| Michel Joindot | 9 | 26 | 8.30 |