In this paper, we analyze the performance of cooperative diversity using adaptive Decode and Forward (DF) relaying over independent but non-necessarily identical flat composite fading channels which include multipath ...In this paper, we analyze the performance of cooperative diversity using adaptive Decode and Forward (DF) relaying over independent but non-necessarily identical flat composite fading channels which include multipath fading and shadowing simultaneously. We have considered the transmission of M-QAM modulated signals over Generalized-K channel model which is very versatile and accurately approximates many of the commonly used channel models as Nakagami-m, Log-Normal distributions and the mixture of the two distributions for the composite fading. Using an approximation of the Generalized-K pdf by a Gamma pdf, we derive analytical expressions for the outage probability and the Average Symbol Error Probability (ASEP) of the proposed scenario and analyze their dependence on the channel parameters. We assume in our context that the relay decides independently whether or not to forward the signal to the destination based on the received signal quality. Simulations are provided for 16-QAM modulation for both the outage and the ASEP. The obtained results are discussed and proved to be in good agreement with our theoretical analysis.展开更多
In this paper, the transmission of confidential messages through single-input multiple-output （SIMO） independent and identically generMized-K （KG） fading channels is considered, where the eavesdropper overhears th...In this paper, the transmission of confidential messages through single-input multiple-output （SIMO） independent and identically generMized-K （KG） fading channels is considered, where the eavesdropper overhears the transmission from the transmitter to the receiver. Both the receiver and the eavesdropper are equipped with multiple antennas, and both active and passive eavesdroppings are considered where the channel state information of the eavesdropper＇s channel is or is not available at the transmitter. The secrecy performance of SIMO KG systems is investigated. Analytical expressions for secrecy outage probability and average secrecy capacity of SIMO systems are derived via two different methods, in which KG distribution is approximated by the Gamma and mixture Gamma distributions, respectively. Numerical results are presented and verified via the Monte-Carlo simulation.展开更多
文摘In this paper, we analyze the performance of cooperative diversity using adaptive Decode and Forward (DF) relaying over independent but non-necessarily identical flat composite fading channels which include multipath fading and shadowing simultaneously. We have considered the transmission of M-QAM modulated signals over Generalized-K channel model which is very versatile and accurately approximates many of the commonly used channel models as Nakagami-m, Log-Normal distributions and the mixture of the two distributions for the composite fading. Using an approximation of the Generalized-K pdf by a Gamma pdf, we derive analytical expressions for the outage probability and the Average Symbol Error Probability (ASEP) of the proposed scenario and analyze their dependence on the channel parameters. We assume in our context that the relay decides independently whether or not to forward the signal to the destination based on the received signal quality. Simulations are provided for 16-QAM modulation for both the outage and the ASEP. The obtained results are discussed and proved to be in good agreement with our theoretical analysis.
基金Project supported in part by the National Natural Science Foundation of China （Nos. 61471076 and 61401372）, the Program for Changjiang Scholars and Innovative Research Team in University, China （No. IRT1299）, the Natural Science Foundation Project of CQ CSTC （No. cstc2013jcyjA40040）, the Project of Fundamental and Frontier Research Plan of Chongqing, China （No. cstc2015jcyjBX0085）, the Special Fund of Chongqing Key Laboratory （CSTC）, the Scientific and Technological Research Program of Chongqing Municipal Education Commission, China （No. KJ1600413）, the Research Fund for the Doctoral Program of Higher Education of China （No. 20130182120017）, and the Fundamental Research Funds for the Central Universities, China （No. XDJK2015B023）. Parts of this publication, specifically Sections 1, 3, and 4, were made possible by PDRA （Post- Doctoral Research Award） from the Qatar National Research Fund （QNRF） （a member of Qatar Foundation （QF））, Qatar （No. PDRA1-1227-13029）
文摘In this paper, the transmission of confidential messages through single-input multiple-output （SIMO） independent and identically generMized-K （KG） fading channels is considered, where the eavesdropper overhears the transmission from the transmitter to the receiver. Both the receiver and the eavesdropper are equipped with multiple antennas, and both active and passive eavesdroppings are considered where the channel state information of the eavesdropper＇s channel is or is not available at the transmitter. The secrecy performance of SIMO KG systems is investigated. Analytical expressions for secrecy outage probability and average secrecy capacity of SIMO systems are derived via two different methods, in which KG distribution is approximated by the Gamma and mixture Gamma distributions, respectively. Numerical results are presented and verified via the Monte-Carlo simulation.
