A soft maximum likelihood technique for time delay recovery A Soft Maximum Likelihood Technique for Time Delay Recovery

Imen Nasr, Leila Atallah, Sofiane Cherif, Benoit Geller, Jianxiao Yang, Imen Nasr, Le¨ıla Le¨ıla, Najjar Atallah, Sofiane Cherif, Benoˆıt Geller, Jianxiao Yang
2014 2014 International Conference on Communications and Networking (ComNet)   unpublished
1 Time delay synchronization is crucial for the reception quality in digital transmission systems. In this contribution, we consider a maximum likelihood approach and incorporate a soft-demapper to improve the synchronization performance. In particular, the proposed scheme allows to update the time delay at each symbol with an adaptive loop using the Log-Likelihood Ratio (LLR) of each bit provided by the demapper. Simulation results show that the proposed approach provides improvements compared
more » ... provements compared to non data aided approach while avoiding data aided approach overhead.