The capacity of wireless networks is fundamentally limited by interference.A few research has focused on the study of the simultaneous effect of interference and correlation, and less attention has been paid to the topic of canceling simultaneous effect of interference and correlation until recently.This paper considers a secure wireless multicasting scenario through multicellular networks over spatially correlated Nakagami-m fading channel in the presence of multiple eavesdroppers.Authors are interested to protect the desired signals from eavesdropping considering the impact of perfect channel estimation (PCE) with interference and correlation.The protection of eavesdropping is also made strong reducing the simultaneous impact of interference and correlation on the secrecy multicast capacity employing opportunistic relaying technique.In terms of the signal-to-interference plus noise ratio (SINR), fading parameter, correlation coefficient, the number of multicast users and eavesdroppers and the number of antennas at the multicast users and eavesdroppers, the closed-form analytical expressions are derived for the probability of non-zero secrecy multicast capacity and the secure outage probability for multicasting to understand the insight of the effects of aforementioned parameters.The results show that the simultaneous effects of correlation and interference at the multicast users degrade security in multicasting.Moreover, the security in multicasting degrades with the intensity of fading and the number of multicast users, eavesdroppers and antennas at the eavesdroppers.The effects of these parameters on the security in multicasting can be significantly reduced by using opportunistic relaying technique with PCE.Finally, the analytical results are verified via Monte-Carlo simulation to justify the validity of derived closed-form analytical expressions.
The capacity of wireless networks is fundamentally limited by interference.A few research has focused on the study of the simultaneous effect of interference and correlation, and less attention has been paid to the topic of canceling simultaneous effect of interference and correlation until recently.This paper considers a secure wireless multicasting scenario through multicellular networks over spatially correlated Nakagami-m fading channel in the presence of multiple eavesdroppers.Authors are interested to protect the desired signals from eavesdropping considering the impact of perfect channel estimation (PCE) with interference and correlation.The protection of eavesdropping is also made strong reducing the simultaneous impact of interference and correlation on the secrecy multicast capacity employing opportunistic relaying technique.In terms of the signal-to-interference plus noise ratio (SINR), fading parameter, correlation coefficient, the number of multicast users and eavesdroppers and the number of antennas at the multicast users and eavesdroppers, the closed-form analytical expressions are derived for the probability of non-zero secrecy multicast capacity and the secure outage probability for multicasting to understand the insight of the effects of aforementioned parameters.The results show that the simultaneous effects of correlation and interference at the multicast users degrade security in multicasting.Moreover, the security in multicasting degrades with the intensity of fading and the number of multicast users, eavesdroppers and antennas at the eavesdroppers.The effects of these parameters on the security in multicasting can be significantly reduced by using opportunistic relaying technique with PCE.Finally, the analytical results are verified via Monte-Carlo simulation to justify the validity of derived closed-form analytical expressions.
The effects of scatterers, fluctuation parameter and propagation clusters significantly affect the performance of κ-μ shadowed fading channel. On the other hand, opportunistic relaying is an efficient technique to improve the performance of fading channels reducing the effects of aforementioned parameters. Motivated by these issues, in this paper, a secure wireless multicasting scenario through κ-μ shadowed fading channel is considered in the presence of multiple eavesdroppers with opportunistic relaying. The main purpose of this paper is to ensure the security level in wireless multicasting compensating the loss of security due to the effects of power ratio between dominant and scattered waves, fluctuation parameter, and the number of propagation clusters, multicast users and eavesdroppers, by opportunistic relaying technique. The closed-form analytical expressions are derived for the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to understand the insight of the effects of above parameters. The results show that the loss of security in multicasting through κ-μ shadowed fading channel can be significantly enhanced using opportunistic relaying technique by compensating the effects of scatterers, fluctuation parameter, and the number of propagation clusters, multicast users and eavesdroppers.
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.
The secrecy of wireless multicast networks is greatly hampered due to the simultaneous presence of fading and shadowing, which can be enhanced using random attributes of the propagation medium. This work focuses on utilizing those attributes to enhance the physical layer security (PHY security) performance of a dual-hop wireless multicast network over kappa-mu shadowed fading channel under the wiretapping attempts of multiple eavesdroppers. In order to raise the secrecy level, we employ multiple relays with the best relay selection strategy. Performance analysis has been carried out based on the mathematical modeling in terms of closed-form expressions of the probability of non-zero secrecy multicast capacity, secure outage probability for multicasting, and ergodic secrecy multicast capacity. Capitalizing on those expressions, we analyze how the system parameters (i.e. fading, shadowing, the number of antennas, destination receivers, eavesdroppers, and relays) affect the secrecy performance. Our numerical results show that the detrimental impacts due to fading and shadowing can be remarkably mitigated using the well-known opportunistic relaying technique. Moreover, the proposed model unifies secrecy analysis of several classical models, thereby exhibits enormous versatility than the existing works. Finally, all the numerical results are authenticated utilizing Monte-Carlo simulations.
This paper focuses on a secure wireless multicasting under the employment of generalized receiver along with selection combining (SC) diversity and opportunistic relaying technique. SC diversity technique mitigate the fading effect significantly. Opportunistic relaying gives cooperative gain by selecting the relay with highest signal to noise ratio (SNR) and the generalized receiver is flexible to adaptive signal processing. In this paper the transmitted signal has been protected from eavesdropping by means of the effect of quantity of relay, receive side antenna number, eavesdropper side antenna number, quantity of multicast user and quantity of eavesdropper. In this manner the authors derived the closed form analytical expression for probability of non-zero secrecy multicast capacity (PNSMC) and secure outage probability for multicasting (SOPM) with the consideration that, multiple eavesdroppers are present. 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 SC diversity and opportunistic relaying technique is significantly affected by the number of relay, transmit and receive side antenna number, number of multicast user and number of eavesdropper, specially at low noise power region of eavesdropper.
This paper focuses on a secure wireless multi-casting under the employment of generalized receiver along with maximal ratio combining (MRC) diversity technique using opportunistic relaying technique. MRC diversity technique and opportunistic relaying technique mitigate the fading effect significantly and the generalized receiver is flexible to adaptive signal processing. The authors want to protect the transmitted signal from eavesdropping considering the effect of number of relays, receive side antenna number, eavesdropper side antenna number, multicast user number and eavesdropper number. In this issue the authors derived the closed form analytical expression for probability of non-zero secrecy multicast capacity (PNSMC) and secure outage probability for multicasting (SOPM) to ensure the secrecy in the presence of multiple eavesdroppers. These mathematical models are helpful to 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 relay, receive antenna, eavesdropper antenna, multicast user and eavesdropper, specially at low noise power region of eavesdropper.
The additional diversity gain provided by the relays improves the secrecy capacity of communications system significantly. The multiple hops in the relaying system is an important technique to improve this diversity gain. The development of an analytical mathematical model of ensuring security in multicasting through fading channels incorporating this benefit of multi-hop relaying is still an open problem. Motivated by this issue, this paper considers a secure wireless multicasting scenario employing multi-hop relaying technique over frequency selective Nakagami-m fading channel and develops an analytical mathematical model to ensure the security against multiple eavesdroppers. This mathematical model has been developed based on the closed-form analytical expressions of the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to ensure the security in the presence of multiple eavesdroppers. Moreover, the effects of the fading parameter of multicast channel, the number of hops and eavesdropper are investigated. The results show that the security in multicasting through Nakagami-m fading channel with multi-hop relaying system is more sensitive to the number of hops and eavesdroppers. The fading of multicast channel helps to improve the secrecy multicast capacity and is not the enemy of security in multicasting.