@inproceedings{462bd28ddb9f40fda3bbc74a970a00a2,
title = "ML time delay estimation for 5g links with DSSS multi-carrier multipath MIMO radio access",
abstract = "This paper presents two new implementations of the maximum likelihood (ML) time delay estimation (TDE) from multi-carrier (MC) Direct-Sequence Spread Spectrum (DSSS) in multipath MIMO transmissions that will characterize future 5G radio interface technologies (RITs). The first TDE, based on expectation maximization (EM), provides accurate estimates of the delays when a good initialisation of the parameters is . The second TDE returns the global maximum of the compressed likelihood function (CLF) using the importance sampling (IS) technique without requiring any initialization. Interestingly, in the non-data-aided (NDA) case, temporal, spatial (transmit and receive), and frequency samples have the same impact on estimation accuracy and performance bound which depends on the product of these dimensions regardless of the channel correlation type. Furthermore, we cope with such channel correlations that arise in practice and, hence, become very challenging both in estimation and CRLB derivation in the data-aided (DA) case, but that have been so far overlooked in previous works.",
keywords = "5G, CRLB, DA, DSSS, EM, Importance sampling (IS), ML, NDA, Post-correlation model (PCM), TDE",
author = "Ahmed Masmoudi and Faouzi Bellili and Sofi{\`e}ne Affes and Ali Ghrayeb",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2017 ; Conference date: 08-10-2017 Through 13-10-2017",
year = "2017",
month = jul,
day = "2",
doi = "10.1109/PIMRC.2017.8292640",
language = "English",
series = "IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1--6",
booktitle = "2017 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications",
address = "United States",
}