摘要
伪卫星信号发射器是研究伪卫星定位的重要环节。本文利用AD9361具有高集成度并且可灵活编程的射频发射器,设计并实现了射频频率可调(70MHz^6.0GHz)的单体伪卫星信号发射器,以满足不同应用场合对频段变换的需求。通过频谱仪、全球卫星导航接收机等平台对所设计的射频信号发射器进行实验测试。测试结果表明,所产生信号频谱准确,信号功率为-130d Bm时仍能够被标准GNSS接收机接收并完成对信号的捕获跟踪电文解算等处理。
Pseudo satellite signal transmitter is an important part in the study of satellite navigation, and it has a wide use in engineering positioning applications. AD9361 has high integration and flexible programming of the RF transmitter, the design and implementation of a simple pseudo satellite signal transmitter based on utilizing the advantages of AD9361 has been described in detail in this article. Its radio frequency can be adjusted from 70MHz to 6.0GHz, which can meet the most needs of different band applications. The designed RF signal transmitter is tested by spectrum analyzer, global navigation satellite receiver. The test results show that the generated signal can be processed by standard GNSS receiver even in -130dBm power level, the acquisition and tracking loop also work well in that kind of situation.
出处
《现代导航》
2018年第1期18-23,共6页
Modern Navigation
