Open AccessPragmatic phase noise compensation for high‐order coded modulations
Author(s) -
Martalò Marco,
Ferrari Gianluigi,
Asim Muhammad,
Gambini Jonathan,
Mazzucco Christian,
Cannalire Giacomo,
Bianchi Sergio,
Raheli Riccardo
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0215
Subject(s) - demodulation , computer science , decoding methods , quadrature amplitude modulation , algorithm , computational complexity theory , maximum a posteriori estimation , phase noise , qam , a priori and a posteriori , theoretical computer science , electronic engineering , telecommunications , mathematics , maximum likelihood , bit error rate , channel (broadcasting) , statistics , philosophy , epistemology , engineering
This study discusses synchronisation in phase noise‐impaired spectrally efficient communication systems employing high‐order modulations. In particular, an iterative receiver, where demodulation and decoding are separate from maximum a posteriori probability (MAP) synchronisation, is presented. The authors’ separate approach is tailored to the design of pragmatic iterative receiver schemes employing ‘off‐the‐shelf’ demodulation and decoding blocks. This allows full compatibility with already existing systems, which is attractive from the implementation viewpoint. The proposed MAP synchronisation algorithm also requires very limited knowledge of the phase noise process and achieves near coherent performance with moderate computational complexity. Although the approach is very general, the authors discuss its performance for low‐density parity‐check‐coded pilot symbol‐aided quadrature amplitude modulation schemes, demonstrating that a significantly lower computational complexity can be achieved with respect to benchmark joint receivers.