LMMSE Receivers in Uplink Massive MIMO Systems with Correlated Rician Fading
Type
ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Date
2018-09-13Online Publication Date
2018-09-13Print Publication Date
2019-01Permanent link to this record
http://hdl.handle.net/10754/628783
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Show full item recordAbstract
We carry out a theoretical analysis of the uplink (UL) of a massive MIMO system with per-user channel correlation and Rician fading, using two processing approaches. Firstly, we examine the linear-minimum-mean-square-error receiver under training-based imperfect channel estimates. Secondly, we propose a statistical combining technique that is more suitable in environments with strong Line-of-Sight (LoS) components.We derive closed-form asymptotic approximations of the UL spectral efficiency (SE) attained by each combining scheme in single and multi-cell settings, as a function of the system parameters. These expressions are insightful in how different factors such as LoS propagation conditions and pilot contamination impact the overall system performance. Furthermore, they are exploited to determine the optimal number of training symbols which is shown to be of significant interest at low Rician factors. The study and numerical results substantiate that stronger LoS signals lead to better performances, and under such conditions, the statistical combining entails higher SE gains than the conventional receiver.Citation
Boukhedimi I, Kammoun A, Alouini M-S (2018) LMMSE Receivers in Uplink Massive MIMO Systems with Correlated Rician Fading. IEEE Transactions on Communications: 1–1. Available: http://dx.doi.org/10.1109/TCOMM.2018.2869586.arXiv
1809.01872Additional Links
https://ieeexplore.ieee.org/document/8458431/ae974a485f413a2113503eed53cd6c53
10.1109/TCOMM.2018.2869586