基于通用计算机的基带信号处理系统实时性分析

摘要

In aerospace TT&C system,real-time performance is of great importance and it is the main factor that must be consid-ered in system design and implementation process.Currently,the TT&C baseband signal processing systems based on general computer have already transitioned from the principle validation phase to the engineering implementation phase due to their flexibility and scal-ability.However,these systems are set up by general computers,and their real-time performance cannot meet the demand of aerospace TT&C task well due to the asynchronous features of the hardware and software.The real-time performance of aerospace TT&C systems is studied in this paper.The requirements of different types of aerospace TT&C tasks for real-time performance are analyzed.A baseband signal processing system based on general computer implementation scheme is proposed,and experiments on platform are conducted.The simulation results show that space TT&C baseband signal processing system based on general computer can meet the real-time perform-ance requirements.%航天测控系统是一类强实时系统，实时性是系统设计和实现过程中必须考虑的主要因素。当前基于通用计算机的基带信号处理系统因其灵活性、易扩展性，已经逐步由原理验证阶段过渡到工程实现阶段，但系统由通用计算机搭建，因软硬件的异步特性，系统的实时性还不能很好地满足测控任务需求。研究了航天测控系统中的实时性，分析了不同类型航天测控任务对实时性的需求，提出了基于通用计算机的测控基带信号处理系统实现方案，并在平台上开展实验。仿真结果表明，基于通用计算机的航天测控基带信号处理系统可以满足实时性要求。