Open AccessDesign of new digital blind feedforward timing recovery algorithm for linear modulations in digital communication receivers
Author(s) -
Ayat Mehdi,
Mirzakuchaki Sattar,
BeheshtiShirazi Ali Asghar
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.2015.0950
Subject(s) - computer science , feed forward , algorithm , modulation (music) , control theory (sociology) , artificial intelligence , acoustics , control engineering , engineering , physics , control (management)
Synchronisers are a significant part of digital communication receivers since they are used to estimate the received signal timing. Among these synchronisers, non‐data‐aided (NDA) or blind synchronisers are even more important due to bandwidth efficiency. In this study, a different approach is investigated to derive new feedforward NDA timing estimators based on Newton algorithm. Two novel estimators with four and two samples per symbol are presented and compared with traditional timing estimators, respectively. One of the main advantages of the second proposed estimator is the ability to control the loop gain automatically. This ability improves the convergence speed and robustness of the design. Simulation results show that the presented estimators outperform the conventional estimators over a noisy channel, especially at small excess bandwidth and low signal to noise ratio.