| 放大转发双向中继网络的移动级联信道统计特征分析 |
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| 引用本文： | 刘海滨,向良军,袁继兵,郑林华.放大转发双向中继网络的移动级联信道统计特征分析[J].国防科技大学学报,2014,36(4):66-70. |
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| 作者姓名： | 刘海滨 向良军 袁继兵 郑林华 |
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| 作者单位： | 空间通信教研室,空间通信教研室,空间通信教研室,空间通信教研室 |
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| 摘 要： | 针对放大转发协议下双向中继网络移动级联信道,为了分析其统计特征,结合用户完成信息交互的过程,将移动级联信道分解为传输部分和干扰部分两个时间过程。依据它们的双高斯乘积特点,分别给出了对应的一阶概率密度分布、二阶自相关函数和多普勒功率谱的表达式。与此同时,通过采用Gamma分布对级联信道进行了概率近似,得到了描述移动级联信道时变特性的电平通过率和平均衰落时间等指标的近似计算式。借助数值仿真验证了上述表达式的正确性。
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| 关 键 词： | 双向中继网络 移动级联信道估计 Gamma分布 自相关函数 电平通过率 |
| 收稿时间： | 2013/11/19 0:00:00 |
Statistical properties of mobile cascade channel in amplify-and-forward two-way relay networks |
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| LIU Haibin,XIANG Liangjun,YUAN Jibing and ZHENG Linhua.Statistical properties of mobile cascade channel in amplify-and-forward two-way relay networks[J].Journal of National University of Defense Technology,2014,36(4):66-70. |
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| Authors: | LIU Haibin XIANG Liangjun YUAN Jibing and ZHENG Linhua |
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| Institution: | College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | This paper deals with the statistical properties of mobile cascade channel in amplify-and-forward (AF) two-way relay networks (TWRN). Based on the distinct statistical properties of double Gaussian which is quite different from that of typical Rayleigh one, the mobile cascade channel can be divided into transmission and interference parts. In addition, the probability distribution functions (PDF), temporal auto-correlation functions (ACF) and Doppler spectrums of the two parts are derived, respectively. Due to the fact that Bessel function in the original PDF hinders the following deduction, Gamma distribution is exploited for approximation by matching positive moments. According on the parameters obtained, closed-form approximated expressions of two critical merits for the mobile cascade channel, level-crossing rate (LCR) and average duration of fades (ADF), are provided. Numerical simulation demonstrates the validity of the proposed expressions. |
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| Keywords: | two-way relay networks mobile cascade channel Gamma distribution auto-correlation function level-crossing rate |
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