Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information

Zhao, Hui; Tan, Youyu; Pan, Gaofeng; Chen, Yunfei

doi:10.1631/fitee.1500430

Cited by 17 publications

(9 citation statements)

References 31 publications

(43 reference statements)

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“…Physical layer security considered outdated CSI was investigated in many literatures [17–24]. The impact of feedback delay on the secrecy performance for MISO multiple‐eavesdropper systems using transmit antenna selection (TAS) was explored in [17].…”

Section: Introductionmentioning

confidence: 99%

Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI

et al. 2017

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“…It is assumed that all the channels within the network are subjected to Rayleigh fading distribution with the average channel power gains of Ω 1 and Ω 2 for MU and PU, respectively. The channel fading with estimation error between the AP‐to‐MU can be defined as 4,25

{\overset{false~}{h}}_{1} = \sqrt{ρ} h_{1} + \sqrt{1 - ρ} ψ,

where h 1 is the channel gain between the AP and the MU, ψ is the estimation error having the same complex Gaussian distribution as h 1 , and ρ denotes the power correlation coefficient with value 0 ≤ ρ ≤ 1. However, due to the noise and the signal distortion or delay of channel estimation, it is difficult to obtain the ideal CSI from MU in most of practical scenes.…”

Section: System Modelmentioning

confidence: 99%

“…When the MU utilises MRC scheme, the power gain for the combiner can be expressed as

X_{MRC} = \sum_{k = 1}^{N} {|{\overset{false~}{h}}_{1}|}^{2}

. Thus, the PDF of X MRC can be written as 25

f_{X_{MRC}} ((), x) = \sum_{k = 1}^{N} normalΨ ((), k) \frac{x^{k - 1} italicexp ((), \frac{- x}{Ω_{1}})}{normalΓ ((), k) {normalΩ}_{1}^{k}},

where

normalΨ ((), k) = ((), \binom{N - 1}{k - 1}) {(1 - ρ)}^{N - k} ρ^{k - 1} .

…”

Section: Channel and Mobility Statistical Modelsmentioning

confidence: 99%

On the performance of underlay cognitive radio system with random mobility under imperfect channel state information

Odeyemi

Owolawi

Olakanmi

2020

Int J Communication

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Summary In this paper, the performance of an underlay cognitive radio system with random mobility and imperfect channel state information (CSI) is investigated. The mobile user (MU) utilises maximum ratio combining (MRC) and selection combining (SC) diversity techniques as signal reception to improve the quality of received signal‐to‐noise ratio (SNR). Under the Rayleigh fading, random waypoint mobility model is employed to characterised the effect of the MU random mobility on the system performance. Thus, novel probability density function (PDF) and cumulative distribution function (CDF) for the two considered diversity techniques are derived. Through these, the outage probability and average bit error rate (ABER) closed‐form analytical expressions are then obtained to quantify the system performance under the MRC and SC schemes. The results illustrate the effect of imperfect CSI, user mobility which is characterised by pathloss and the network topology on the system performance. Also, the results depict that MRC offers the system better performance compared with SC under the same system conditions. The accuracy of the derived analytical expressions is verified through Monte‐Carlo simulations.

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“…In this case, we are interested in the ESC. From [26], we can derive the ESC in the integral form as…”

Section: A Exact Ergodic Secrecy Capacitymentioning

confidence: 99%

Secrecy Analysis in DF Relay Over Generalized-$K$ Fading Channels

Zhao

Liu

Yang

et al. 2019

IEEE Trans. Commun.

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In this paper, we analyze the secrecy performance of the decode-and-forward (DF) relay system in generalized-K fading channels. In a typical four-node communications model, a source (S) sends confidential information to a destination (D) via a relay (R) using DF strategy in two time slots, while an eavesdropper (E) wants to overhear the information from S to D over generalized-K fading channels. To be more realistic, we assume that E can receive the signals of two time slots, and there is no direct link between S and D because of heavy fading. Based on those assumptions, we derive closed-form expressions for the secrecy outage probability (SOP) and ergodic secrecy capacity (ESC) by using a tight approximate probability density function of the generalized-K model. Then, asymptotic expressions for the SOP and ESC are also derived in the high signal-to-noise ratio region, not only because we can get some insights about SOP and ESC, but also because expressions for SOP and ESC can be simplified significantly. The single relay system is subsequently extended into a multi-relay system, where the asymptotic SOP analysis of three proposed relay selection strategies is investigated. Further, the security-reliability tradeoff analysis in the multi-relay system is also presented given that S adopts a constant code rate. Finally, the Monte-Carlo simulation is used to demonstrate the accuracy of the derived closed-form expressions.

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Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information

Cited by 17 publications

References 31 publications

Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI

Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI

On the performance of underlay cognitive radio system with random mobility under imperfect channel state information

Secrecy Analysis in DF Relay Over Generalized-$K$ Fading Channels

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