@inproceedings{c14a060273fe42c085dfce9f7a774a39,
title = "Superimposed pilots: An alternative pilot structure to mitigate pilot contamination in massive MIMO",
abstract = "Superimposed pilots are proposed as an alternative to time-multiplexed pilot and data symbols for mitigating pilot contamination in massive multiple-input multiple-output systems. Provided that the uplink duration is larger than the total number of users in the system, superimposed pilots enable each user to be assigned a unique pilot sequence, thereby allowing for a significant reduction in pilot contamination. Channel estimation performance in the uplink is further improved using an iterative data-aided algorithm. Based on approximate expressions for the uplink signal-to-interference-plus-noise ratio, it is shown that superimposed pilots provide a better performance when compared with methods that use time-multiplexed data and pilots. Numerical simulations are used to validate the approximations and the improved performance of the proposed method.",
keywords = "Massive MIMO, pilot decontamination, superimposed pilots",
author = "Karthik Upadhya and Vorobyov, {Sergiy A.} and Mikko Vehkapera",
year = "2016",
month = may,
day = "18",
doi = "10.1109/ICASSP.2016.7472301",
language = "English",
series = "Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing",
publisher = "IEEE Institute of Electrical and Electronic Engineers",
pages = "3366--3370",
booktitle = "2016 IEEE International Conference on Acoustics, Speech and Signal Processing",
address = "United States",
note = "41st IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 ; Conference date: 20-03-2016 Through 25-03-2016",
}