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IEEE Consumer Communications and Networking Conference

Security enhancement using maximum ratio combining (MRC) diversity over nakagami-m fading channels

Mahmoud A. Khodeir, Mamoun F. Al‐Mistarihi, Razan F. Shatnawi, Laila Alsaleh

Published Jan 1, 2017• 4 citations
Publisher

Abstract

This paper presents a method of increasing the secrecy capactty utilizing the channel diversity technique in wireless communication. In general, a relatively higher secrecy capactty can be achieved at the intended receiver by deploying channel diversity to mitigate the effect of low signal to noise ratio. In this analysis, the legitimate receiver and the eavesdropper are assumed to employ maximal ratio combining diversity technique to combine the received signals coming from the transmitter. Considering Nakagami-m wireless fading channels, dosed-form expressions for the secrecy outage probability and the probability of secrecy capacity are derived, which can be used as quality of service metrics. The numerical result confirms that the security of any wireless network model or communication system at a common operating system can be improved by using maximal ratio combining diversity technique as expected.

DOI
10.1109/ccnc.2017.8013421

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This paper presents a method of increasing the secrecy capactty utilizing the channel diversity technique in wireless communication. In general, a relatively higher secrecy capactty can be achieved at the intended receiver by deploying channel diversity to mitigate the effect of low signal to noise ratio. In this analysis, the legitimate receiver and the eavesdropper are assumed to employ maximal ratio combining diversity technique to combine the received signals coming from the transmitter. Considering Nakagami-m wireless fading channels, dosed-form expressions for the secrecy outage probability and the probability of secrecy capacity are derived, which can be used as quality of service metrics. The numerical result confirms that the security of any wireless network model or communication system at a common operating system can be improved by using maximal ratio combining diversity technique as expected.
The diversity scheme has been used recently to improve the reliability of the massage signal by using two or more communication channels depending on many characteristics. Maximum Ratio Combining (MRC) is one of the diversity combining methods by which the signals from each channel are added together and the gain of each channel is made to proportionate to the root mean square signal level. In this paper a diversity technique is proposed to increase the secure capacity over wireless fading channels. The legitimate user (Bob) takes on MRC to maximize the probability of secure transmission, whereas eavesdropper takes on MRC to maximize the probability of successful eavesdropping. We assume that Bob and Eve follow different fading channels, Rayleigh and Nakagami-m, respectively. Depending on these assumptions, closed-form expression for secrecy outage probability is derived.
This paper investigates the role of the Maximum Ratio Combining (MRC) diversity scheme in enhancing security for multicast communications over a Nakagami-0.5 fading channel in the presence of multiple eavesdroppers. The considered scenario involves a singleantenna transmitter communicating confidentially with multiple legitimate receivers, while multiple eavesdroppers attempt to intercept the transmission. Explicit mathematical formulation have been established to evaluate the likelihood of achieving a positive secrecy multicast capacity and the probability of a secure outage, providing a theoretical framework to evaluate the secrecy performance. The analysis highlights the impact of critical system parameters, including the number of legitimate receivers, the number of eavesdroppers and the number of antennas employed at both legitimate receivers and eavesdroppers. By employing MRC, which coherently combines signals from multiple antennas to maximize the received signal-to-noise ratio, the study demonstrates significant improvements in the secrecy performance of multicast systems. The findings contribute valuable insights into designing more secure multicast communication networks in the presence of severe fading and adversarial interception.
This paper focuses on a secure wireless multicas-ting under the employment of generalized receiver along with maximal ratio combining (MRC) diversity technique. MRC diversity technique mitigate the fading effect significantly and the generalized receiver is flexible to adaptive signal processing. In this paper, the transmitted signal has been protected from eavesdropping considering the effect of receive side antenna number, eavesdropper side antenna number, multicast user number and eavesdropper number. In this manner the authors derived the closed form analytical expression for the probability of non-zero secrecy capacity of multicast system (PNSMC) and for the secure outage probability of multicast system (SOPM) to ensure the secrecy in the presence of multiple eavesdroppers. These mathematical models are helpful to realize the insight of the effects of aforementioned parameters. The numerical results show that, security in multicast network employing generalized receiver with MRC diversity technique is significantly affected by the number of receive antenna, eavesdropper antenna, multicast user and eavesdropper, specially at low noise power region of eavesdropper.
In this paper, we present a method of utilizing channel diversity to increase secrecy capacity in wireless communication. With the presence of channel diversity, an intended receiver can achieve a relatively high secrecy capacity even at low SNRs. We present a theoretical analysis on the outage probability at a normalized target secrecy capacity in Rayleigh fading environment. Our numerical results strongly support our conclusion that maximal ratio combining of channel diversity can enhance the security of the wireless communication system in normal operating scenarios.
This paper presents a study on secure wireless multicasting using a Neyman-Pearson receiver in conjunction with the maximal ratio combining (MRC) diversity technique and opportunistic relaying. The MRC diversity technique effectively mitigates the impact of fading, while opportunistic relaying enhances cooperative communication by selecting the relay with the highest signal-to-noise ratio (SNR). The authors aim to safeguard the transmitted signal from eavesdropping, considering factors such as the number of relays, the number of receive and eavesdropper-side antennas, the number of multicast users, and the number of eavesdroppers. In this context, closed-form analytical expressions are derived for the probability of nonzero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to ensure secrecy in the presence of multiple eavesdroppers. These mathematical models shed essential light on how the previously listed parameters affect things. Numerical results demonstrate that the security of the multicast network employing the Neyman-Pearson receiver, MRC diversity, and opportunistic relaying is significantly influenced by the number of relays, antennas on both the receiver and eavesdropper sides, multicast users, and eavesdroppers, particularly in low noise power regions of the eavesdropper channel.
In this correspondence, we consider a confidential communication through slow non-selective correlated Rayleigh fading channel, where a single antenna transmitter communicates at a pre-decided constant rate with a legitimate receiver in the presence of an eavesdropper. Both the legitimate receiver and eavesdropper are equipped with multiple antennas and employ maximal ratio combining (MRC) reception scheme. With the presence of channel diversity, we find the closed-form expressions for the probability of non-zero secrecy capacity and the outage probability of secrecy capacity in terms of channel parameters such as correlation coefficient and the ratio of main and eavesdropper channel gains that will be called average channel gain ratio (CGR). The analysis of secure outage performance with the MRC diversity scheme tells how the channel diversity enhances the secrecy capacity. We quantify the effect of antenna correlation on the probability of positive secrecy capacity and the secure outage probability. We also investigate how the target secrecy rate influences the effect of antenna correlation on the secure outage probability. Moreover, as a result of obtaining the closed-form expressions for the probability of positive secrecy capacity and the outage probability, it is insightful to see how the channel parameters affect the secure outage performance of the correlated channels.