摘要
文中将多种测距转发模式进行对比,最终采用非相干AGC模式实现透传测距系统。系统基于锁相环原理设计了主载波解调模块,用于提取接收中频信号的相位信息;采用AGC(Automatic Gain Control)自动增益控制模块,保证测距滤波器输出的信号加噪声功率固定不变;通过FDATOOL和Xilinx的FIR IP核在FPGA内设计可复用了158阶带通滤波器,实现星上侧音提取;同时设计了相位调制器,将提取出来的侧音信号与由遥测副载波产生模块、遥测数据发生器产生的调制后的遥测数据一起送至相位调制器,完成调制并输出给发射机,最终形成了一个有效并具有实际应用价值的测控应答机透传测距系统。通过仿真和Matlab频谱测试,验证此系统功能正确,能够实现测距转发。
In this paper,a variety of ranging forwarding mode is compared,and finally the non-coherent AGC mode is used to realize the transmission Ranging system.The System designs the main carrier demodulation module to extract the phase information of the received IF signal based on the principle of phase-locked loop,AGC(Automatic Gain Control)automatic gain control module is used to ensure the filter output signal plus noise power unchanged.The158band reusable bandpass filter is designed in the FPGA to achieve the extraction of ranging signal through the FDATOOL and Xilinx FIR IP core.At the same time,a phase modulator is designed to modulate and send the extracted ranging signal together with the modulated telemetry data generated by the telemetry subcarrier generating module and the telemetry data generator to the transmitter,Finally an effective and practical TT&C Transponde transmission Ranging system is formed.simulation and Matlab spectrum test verify that the system has the correct function and can achieve ranging.
作者
孙冬雪
周玉婷
王竹刚
SUN Dong-xue;ZHOU Yu-ting;WANG Zhu-gang(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Computer and Control Engineering,University of Chinese Academy of Sciences,Beijing 100190,China)
出处
《电子设计工程》
2019年第2期166-170,共5页
Electronic Design Engineering
