提出了一种卫星数传通信系统运行仿真平台的设计方法。利用带通采样定理，对仿真系统进行了采样率设计，推导了最低等效载波频率的计算公式，应用该公式设计了与实际系统等效的仿真系统的时间和频率。根据系统功能结构，设计了系统软件架构和运行进程。最后，建立了相应的功能模型。该卫星数传通信仿真系统包括独立运行和网络调度运行两种工作模式，能够仿真包括射频调制在内的发射和接收所要求的功能模型，并提供分析评估模型。通过分析评估模型，给出了整体仿真系统的频谱、眼图、误码率与信噪比的情况。本仿真系统在信噪比为-2.5 dB的情况下，误码率可达到10-5，仿真结果与理论吻合得很好。

A design method for a satellite data traffic system was developed by using a band-pass sampling theorem, the simulation system sampling rate was designed, from which the lowest equivalent carrier wave formula was deduced. The deduced formula could be applied to other simulation systems. At the same time, equivalent design methods for time and frequency of the practical system were presented. According to the system function structure, the system software frame and running threads were studied. Finally, corresponding function models were realized. Two work modes including an independent running and a network controlling were provided to simulate integrally functional models required by the transmitter and receiver of the satellite data-traffic system including radio modulation. Based on the evaluation model, the frequency spectrum, eye pattern and relation of Bit Error Ratio(BER) and Signal to Noise Ratio(SNR) were presented. Experimental results show that when the SNR is equal to -2.52 dB,the BER of this simulation system is 10-5. The simulation results are basically in agreement with theoretical values.