@inproceedings{ddd5125fb9d447daa3c752b24c95ba9c,
title = "Spectral and energy efficiency for multi-pair massive MIMO two-way relaying networks with imperfect CSI",
abstract = "A multi-pair two-way amplify-and-forward relaying system is considered in this paper, where the K-pair users exchange information within pairs, with the help of a shared relay station. Each user is equipped with a single antenna while the relay station is equipped with a very large number of antennas N, where N << 2K. The impact of imperfect channel state information (CSI) due to the channel estimation errors on spectral efficiency (SE) and energy efficiency (EE) is investigated. Asymptotic expressions for EE and SE are obtained in this paper for three power-scaling schemes when maximum-ratio combining/maximum-ratio transmission(MRC/MRT) is adopted. Our analytical results reveal that when the number of relay station antennas N → ∞, the effect of the small-scale fading can be averaged out; the residual self-interference and additional noise generated by channel estimation errors will completely vanish, and the inter-pair interference will disappear. However, the imperfect CSI deteriorates EE and SE. When there are no estimation errors, our analytical results reduce to the existing results. Simulation results confirm the validity of our analysis.",
keywords = "Energy efficiency, Imperfect CSI, Massive MIMO, Spectral efficiency, Two-way relaying",
author = "Hongyan Wang and Jie Ding and Jing Yang and Xiqi Gao and Zhiguo Ding",
note = "Funding Information: This work is financially supported by the National Natural Science Foundation of China (Grant No. 61301111,61472343,61401387,61301220) and by China Postdoctoral Science Foundation (Grant No. 2014M56074). J. Ding also acknowledges the support by SRF for ROCS, SEM, and Talent Project of New Century, Yangzhou University. Publisher Copyright: {\textcopyright} 2015 IEEE.; 82nd IEEE Vehicular Technology Conference, VTC Fall 2015 ; Conference date: 06-09-2015 Through 09-09-2015",
year = "2016",
month = jan,
day = "25",
doi = "10.1109/VTCFall.2015.7391151",
language = "British English",
series = "2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings",
address = "United States",
}