摘要
为了对深空通信设备进行测试和性能评价,提出了基于虚拟仪器的深空信道仿真器的设计方法,研究了残留载波调制技术,发射信号在深空信道中的时变衰落以及基于虚拟仪器仿真技术的实现方法。并基于NI PXI5671虚拟仪器平台,研制出参数可任意配置并且可与轨道信息相结合的中频信道仿真器,在"萤火一号"地面测试中发挥一定作用。通过对该深空信道仿真器输出信号的频谱与理论值的对比,验证了信道仿真器的准确性和有效性。
To evaluate the performance of deep space communication equipments,a design method of deep space channel simulator based on virtual instrument is proposed.Firstly,a deep space channel model is constructed and attenuation of signal in deep space channel is researched.Then,the residual modulation technology is adopted and an orbit-information-based IF signal is created by NI PXI5671.Finally,the output signal is compared with theoretical value and the veracity and validity of the simulator is confirmed.
出处
《电子测量技术》
2010年第3期89-92,共4页
Electronic Measurement Technology
