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Secrecy Capacity Analysis of MIMO System over Multiple Destinations and Multiple Eavesdroppers

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Abstract

In this paper we address physical layer security of multiple input multiple output (MIMO) communication system in presence of multiple destinations and passive eavesdroppers. Since the eavesdroppers are passive, it is assumed that channel state information (CSI) of the eavesdroppers are not available at the source. Spatial beamforming and artificial noise broadcasting are chosen as the strategy for securing the transmission. Secrecy capacity for optimum power allocation and uniform power allocation with power constraints are analyzed. Optimum power allocation technique is applied when all the authorized users have different data rates. Uniform power allocation is done when all the authorized users have the same data rate. The analytical results are derived and validated through simulation results and finally it is compared with existing methods.

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Acknowledgements

The work is supported by Visvesvaraya PhD scheme for Electronics and IT, Ministry of Electronics & Information Technology (MeitY) Government of India, being implemented by Digital India Corporation (formerly Media Lab Asia). Nibedita Nandan is a PhD scholar under Visvesvaraya PhD scheme and S. Majhi is recipient of Sir Visvesvaraya Young Faculty Research Fellow award.

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Authors and Affiliations

  1. Department of Electrical Engineering, Indian Institute of Technology, Patna, India

    Sudhan Majhi & Nibedita Nandan

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  1. Sudhan Majhi
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  2. Nibedita Nandan
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Correspondence to Nibedita Nandan.

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Majhi, S., Nandan, N. Secrecy Capacity Analysis of MIMO System over Multiple Destinations and Multiple Eavesdroppers. Wireless Pers Commun 100, 1009–1022 (2018). https://doi.org/10.1007/s11277-018-5363-8

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  • DOI: https://doi.org/10.1007/s11277-018-5363-8

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