Application of digital signal processing in coherent optical communication systems
In this thesis, we study the application of DSP techniques in optical coherent communication systems and propose a few algorithms to improve receiver performance. An accurate two-stage frequency offset estimation (FOE) algorithm is introduced, whose mean square error (MSE) is two orders less tha...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/55449 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In this thesis, we study the application of DSP techniques in optical coherent communication systems and propose a few algorithms to improve receiver performance.
An accurate two-stage frequency offset estimation (FOE) algorithm is introduced, whose mean square error (MSE) is two orders less than that of the conventional phase difference-based FOE.
A low complexity phase interpolation filter is proposed for block-averaging carrier phase estimation (CPE) algorithms. The performance of block estimation with proposed filter is similar to that of the sliding-window estimation.
An adaptive joint-polarization carrier phase recovery algorithm is proposed to estimate FO and carrier phase in one block to reduce complexity. Signals from both polarizations are jointly processed for better noise immunity.
A decision-aided CPE with selective averaging is introduced. Symbols with significantly large noise are identified and excluded to reduce estimation distortion.
Finally, a DSP-based receiver for coherent long-reach optical access network is studied. Issues such as Burst-mode clock data recovery and frequency chirp mitigation are addressed. |
|---|