广义衰落信道上基于协作多载波中继的无人机网络性能分析
Performance Analysis of Cooperative Multi-Carrier Relay-Based UAV Networks Over Generalized Fading Channels
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中文总结 AI 辅助
本文针对广义衰落信道下的协作多载波中继无人机网络，利用有限混合与期望最大化算法推导中断概率与平均比特率的闭式表达式，分析系统性能。
中文摘要 AI 辅助
本文利用有限混合与期望最大化技术，对广义衰落信道上协作无人空中飞行器（UAV）网络的中断概率进行了分析研究。考虑了一种包含一个地面控制单元（GCU）的基于中继的拓扑结构，其中协作无人机可以直接或通过中继与GCU通信。无人机所分配的任务决定了其应达到的最低所需传输速率。系统的中断概率定义为：任何链路上的传输速率低于该链路预定义的最低阈值，或者中继-GCU链路无法传输来自所有中继无人机及中继无人机自身所需最低速率的聚合数据的概率。本文在广义衰落信道上推导了协作多载波系统的中断概率和平均可达比特率的表达式。利用有限混合与期望最大化算法，在假设自适应M进制正交幅度调制（M-QAM）的情况下，推导了可达比特率概率密度函数（pdf）的简单近似表达式。该pdf用于推导中断概率和平均比特率的闭式表达式。
英文摘要
The outage probability in a network of cooperative unmanned airborne vehicles (UAVs) over generalized fading channels is studied analytically using finite mixture with expectation maximization technique. A relay-based topology with one ground control unit (GCU) is considered, where the cooperative UAVs can communicate with the GCU directly or through relay. The application the UAV assigned for specifies the minimum required transmission rate the UAV should achieve. The outage probability of the system is defined as the probability that either the transmission rate over any of the links drops below a predefined minimum threshold for that link or the Relay-GCU link is not able to transmit the aggregate data from all relayed UAVs and the minimum rate required by the relay UAV itself. Throughout the paper, expressions for the outage probability and the average achievable bit rate of a cooperative multi-carrier system are derived over generalized fading channels. Finite Mixture with Expectation-Maximization algorithm is utilized to derive a simple approximate expression for the probability density function (pdf) of the achievable bit rate assuming adaptive M-ary quadrature amplitude modulation (M-QAM). This pdf is used to derive closed-form expressions for the outage probability and the average bit rate.
发表机构
- Khalifa University（哈利法大学）
- The University of Mississippi（密西西比大学）
机构由 AI 辅助整理，请以论文原文为准。
