| 摘要: |
| 多径效应是造成无人机测控系统可用性降低的重要原因之一。为了降低多径效应对无人机（UAV）测控系统的影响，提出了一种非相干测距技术方案。该方案利用了单载波频域均衡（SC-FDE）技术以及优化遥控帧与伪码速率关系及发送位置的方法，降低了机上测距数据下传误码率，同时提高了机上采样精度。经仿真验证，在反射路径信号比直达路径小6 dB且信噪比大于7 dB时，系统的测距精度满足无人机测控系统的指标要求。 |
| 关键词: 无人机测控系统 单载波频域均衡 非相干测距 测距精度 |
| DOI： |
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| 基金项目: |
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| An unmanned aerial vehicle ranging scheme with anti-multipath effect capability |
| RAO Jun |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| The multipath effect is one of the most important reasons reducing the usability of an Unmanned Aerial Vehicle Telemetry,Tracking and Control(UAV TT&C) system.In order to reduce the influence of multipath effect on UAV TT&C systems,an incoherent ranging scheme is proposed. In this scheme,Single-Carrier Frequency Domain Equalization(SC-FDE) technology and method of optimizing the rate relationship between the remote control frame and pseudo-random code as well as send-position are adopted so as to decrease the downward error rate of ranging data and increase the sampling accuracy onboard. Simulation shows that the ranging accuracy meets the requirement of UAV TT&C system if the reflection path signal is 6 dB smaller than the direct path and signal-to-noise ratio is greater than 7 dB. |
| Key words: UAV TT&C system single-carrier frequency domain equalization(SC-FDE) incoherent ranging ranging precision |
《电讯技术》编辑部 