衰退
累积分布函数
继电器
频道(广播)
误码率
拓扑(电路)
计算机科学
分集增益
电子工程
衰落分布
信道状态信息
算法
数学
统计
电信
概率密度函数
无线
物理
工程类
组合数学
瑞利衰落
功率(物理)
量子力学
作者
Sai Li,Yin Tang Yang,Liang Yang,Yougang Bian
出处
期刊:IEEE Transactions on Vehicular Technology
[Institute of Electrical and Electronics Engineers]
日期:2023-07-01
卷期号:72 (7): 9175-9188
被引量:1
标识
DOI:10.1109/tvt.2023.3251349
摘要
A multiuser mixed radio frequency/terahertz (MRFTHz) system is studied, where the multiple RF channels experience η-μ fading and the THz channel obeys α-μ 1 fading with pointing errors (PEs). Both fixed-gain (FG) amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered in the relay. Firstly, the exact expressions of the cumulative distribution functions of the overall signal-to-noise ratio under AF and DF schemes are derived. On this basis, the Fox's H-function (FHF) and bivariate FHF are used to obtain exact analytical expressions of the outage probability (OP), average bit error rate, and average channel capacity. Additionally, the asymptotic results at high signal-to-noise ratios (SNRs) are provided to gain the system's diversity order (DO). Results show that the DOs of the AF and DF relaying systems are decided by the PEs and channel fading parameters (FPs). In addition, considering the FG AF relaying and multi-antenna scenarios, the asymptotic OP at high SNRs is derived, which obtaining the DO is determined by the numbers of the antenna, PEs, and FPs. Finally, we apply the Monte Carlo simulations to verify numerical results. Results show that the path loss, PEs, FPs, and the number of users can significantly affect the proposed multiuser MRFTHz system.
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