Article (Scientific journals)
Secure Transmission in Cell-Free Massive MIMO With RF Impairments and Low-Resolution ADCs/DACs
Zhang, Xianyu; Liang, Tao; An, Kang et al.
2021In IEEE Transactions on Vehicular Technology, 70 (9, Sept. 2021), p. 8937 - 8949
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Abstract :
[en] This paper considers the secure transmission in a cell-free massive MIMO system with imperfect radio frequency (RF) chains and low-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) at both access points (APs) and legitimate users, where an active eavesdropper attempts to wiretap the confidential data. The Gaussian RF impairment model (GRFIM) and additive quantization noise model (AQNM) are used to evaluate the impacts of the RF impairments and low resolution ADCs/DACs, respectively. The analytical results of the linear minimum mean square error (MMSE) channel estimation show that there is nonzero floor on the estimation error with respect to the RF impairments, ADC/DAC precision and the pilot power of the eavesdropper which is different from the conventional case with perfect transceiver. Then, a tractable closed-form expression for the ergodic secrecy rate is obtained with respect to key system parameters, such as the antenna number per AP, the AP number, user number, quality factors of the ADC/DAC and the RF chain, pilot signal power of the eavesdropper, etc. Moreover, a compensation algorithm between the imperfect RF components and the inexpensive coarse ADCs/DACs is also presented. Finally, numerical results are provided to illustrate the efficiency of the achieved expressions and the devised algorithm, and show the effects of RF impairments and low resolution ADC/DAC on the secrecy performance.
Disciplines :
Computer science
Author, co-author :
Zhang, Xianyu
Liang, Tao
An, Kang
Zheng, Gan
CHATZINOTAS, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
External co-authors :
yes
Language :
English
Title :
Secure Transmission in Cell-Free Massive MIMO With RF Impairments and Low-Resolution ADCs/DACs
Publication date :
July 2021
Journal title :
IEEE Transactions on Vehicular Technology
ISSN :
0018-9545
Publisher :
IEEE
Volume :
70
Issue :
9, Sept. 2021
Pages :
8937 - 8949
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
Funders :
10.13039/501100001809-National Natural Science Foundation of China (Grant Number: 61901502) - 10.13039/501100000266-Engineering and Physical Sciences Research Council (Grant Number: EP/N007840/1) - 10.13039/501100012152-National Postdoctoral Program for Innovative Talents (Grant Number: BX20200101 and 18-QNCXJ-029)
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