无人机协同测控中SC-FDMA技术设计

Design of SC-FDMA in UAV cooperative measurement and control transmission

摘要:

针对无人机协同任务测控传输的多机接入问题，提出基于分布式任务分配模型的高动态SC-FDMA技术。通过将贪婪原则、信道动态分配机制和多用户接入技术结合，利用集中映射方式设计子信道数目可调的映射规则，配置各无人机节点所占用子载波数目。仿真结果表明，与传统FDMA、CDMA、TDMA、OFDMA等相比，基于SC-FDMA设计的一站多机测控链路在峰均比、误码率、频带效率、重构时间等方面具有更均衡的性能，可改善系统可靠性、实时性、安全性和稳定性，更加适于无人机空地时变信道星状网互联，并且有效实现了任务分配、信道环境和链路状态的统一。

Abstract:

Aiming at the multi access problems of cooperative task measurement and control transmission of UAVs, high- dynamic SC-FDMA technology based on distributed task allocation model is proposed. By combining greedy principle, dynamic channel allocation mechanism and multi-user access technology, a mapping rule with adjustable number of subcarriers is designed by centralized mapping, and the number of subcarriers occupied by each UAV node is configured. The simulation results show that the data link of one-station multi-UAVs based on SC-FDMA has more balanced performance in terms of peak-to-average ratio, bit error rate, band efficiency, and reconstruction time compared to the traditional FDMA, CDMA, TDMA, OFDMA, etc. It can improve the reliability, real-time performance, security and stability of the system, and effectively unify the task allocation, channel environment and link state, which is more suitable for star network interconnection UAVs in air ground time-varying channel.