Security Vulnerability of FDD Massive MIMO Systems in Downlink Training Phase

Sheikhi, Mohammad Amin; Razavizadeh, S. Mohammad

doi:10.1109/istel.2018.8661082

Cited by 1 publication

(2 citation statements)

References 21 publications

(27 reference statements)

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“…In order to perform the power allocation with a cost function based on (21), the BS needs to have an estimation of the average jamming power received at each UE in advance. To do so, we propose that for a period of C T c channel uses in n t consecutive blocks, the BS does not transmit any signal in the downlink data phase.…”

Section: A Jamming Power Estimationmentioning

confidence: 99%

See 1 more Smart Citation

A Comparison of TDD and FDD Massive MIMO Systems Against Smart Jamming

2020

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Frequency division duplex (FDD) massive multiple-input multiple-output (MIMO) systems introduce a large overhead in downlink channel estimation in contrast to the time division duplex (TDD) mode. This overhead results in a considerable spectral efficiency (SE) gap between the FDD and TDD modes. In this paper, we consider the performance of the TDD and FDD massive MIMO systems with a spatially correlated channel in the presence of jamming in the network. We show how a smart jammer can effectively design its attack signal to degrade the network performance in terms of the downlink SE. Since the jammer can obtain different information about the channels in the TDD and FDD modes, two distinct jamming strategies are proposed for each mode. In the numerical results, the performance of both the TDD and FDD modes under the optimized jamming designs are evaluated and compared. Our results show that despite more attention to the TDD mode in current massive MIMO systems, it is more vulnerable to smart jamming attacks compared to the FDD mode which results in a smaller SE-gap between the modes. Furthermore, a countermeasure technique is proposed to combat this jamming attack in both the TDD and FDD modes by estimating the jamming power, grouping users, and allocating power among them. The numerical results demonstrate the effectiveness of the proposed countermeasure techniques in both the TDD and FDD modes.INDEX TERMS Frequency division duplex (FDD), massive MIMO, physical layer security, smart jamming, time division duplex (TDD).

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Section: A Jamming Power Estimationmentioning

confidence: 99%

“…Physical layer security is known as an efficient approach to deal with the security problems in wireless channels [9]- [11]. Recently, the physical layer security has been investigated extensively in the massive MIMO systems [12]- [21].…”

Section: Introductionmentioning

confidence: 99%