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Title: Study on phase interpolation filters for coherent optical communications
Authors: Huang, D.
Cheng, T.-H.
Yu, C. 
Keywords: Carrier phase recovery
coherent optical communication
low complexity
Phase interpolation
Issue Date: 2013
Citation: Huang, D., Cheng, T.-H., Yu, C. (2013). Study on phase interpolation filters for coherent optical communications. IEEE Photonics Technology Letters 25 (17) : 1731-1733. ScholarBank@NUS Repository.
Abstract: In most of the carrier phase estimation (CPE) algorithms, there is a need to average a block of symbols to mitigate the noise effect. The symbols within a block may share the same derived phase (block estimation), or alternatively, a symbol by symbol sliding-window filter can be used to get each symbol a unique phase (sliding-window estimation). It is well-known that block estimation has lower estimation accuracy but consumes less computational power compared with sliding-window estimation. To improve the performance of CPE employing block estimation, we study and propose a phase interpolation filter that is simpler than the sliding-window filter, and show analytically that linear phase interpolation yields the best performance. Simulation and experimental results show that the phase interpolation filter effectively improves the performance of block estimation to the level similar to that of the sliding-window estimation. © 2013 IEEE.
Source Title: IEEE Photonics Technology Letters
ISSN: 10411135
DOI: 10.1109/LPT.2013.2274998
Appears in Collections:Staff Publications

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