Performance Analysis of Cooperative Multi-Carrier Relay-Based UAV Networks Over Generalized Fading Channels

2026-09-17

AI Summary

研究使用有限混合与期望最大化技术分析了在广义衰落信道中基于接力的多载波无人机网络的中断概率，推导了中断概率和平均可实现比特率的表达式。

Abstract

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.

Problem

• outage probability
• cooperative UAVs
• generalized fading channels
• relay-based topology
• minimum required transmission rate

Innovation

• Finite Mixture with Expectation-Maximization
• Outage Probability
• Cooperative Multi-Carrier System
• Generalized Fading Channels
• Adaptive M-ary QAM