星载测量通信系统模拟器设计与实现

Design and Implementation of Simulator of Spaceborne Measurement and Communication System

摘要:

为了在地面对星载测量通信系统之间互联互通性能进行测试评估,设计了一种可替代星载测量通信系统的地面模拟器,该模拟器由收发信机,时频单元,信道仿真器以及管理控制计算机构成,收发信机采用双FPGA架构设计,支持星间信号的收发处理,在功能性能指标方面与星载设备具有良好的一致性,信道仿真器能够实现信号传输延时、多普勒以及衰落特性的实时仿真,可显著增强试验场景的真实性以及评估结论的可信性;互联互通试验过程表明,该模拟器功能齐全、性能可靠、操控简单并且易于搬运,试验结果有效验证了星间互联互通方案的可行性。

Abstract:

A ground simulator of spaceborne measurement and communication system (SMCS) was designed to test and evaluate the interconnection of SMCS on the ground. The simulator consists of transceiver, time frequency unit, channel emulator and management control computer. The transceiver includes two FPGAs, which supports signal transmitting and receiving processing between satellites. Furthermore, it has good consistency in function and performance with spaceborne devices. The channel emulator can real-time simulate signal transmission delay, doppler and the fading characteristics, which significantly enhanced the authenticity of the test and the credibility of evaluation conclusion. The process of interconnection test had showed the simulator had many advantages, such as complete function, reliable performance, simple manipulation and easy handling. The test results effectively verified the feasibility of the interconnection scheme for inter satellite.