近年来全球导航卫星系统(GNSS)抗干扰技术逐渐成为研究热点，在抗干扰研究中，宽带干扰背景下的多阵元卫星导航信号模拟发挥着至关重要的作用。为了提高抗干扰研究效率，通过Matlab模拟的方法研究了卫星导航软件接收机入口数字中频信号的模拟问题。根据信干噪比进行功率控制，分别对卫星导航信号、干扰信号和噪声信号进行建模，计算阵列天线带来的延时，最后模拟了宽带干扰背景下阵列天线的卫星信号并设计了图形用户(GUI)界面。在模拟完成后，将信号输入到抗干扰算法的研究系统进行测试，解决了抗干扰研究中复杂的干扰信号源模拟问题，提高了抗干扰研究的工作效率，同时验证了本研究的实用性和正确性。

In recent years, anti-interference technology of Global Navigation Satellite System(GNSS) has gradually become a research hotspot. In anti-interference research, satellite navigation signal simulation on array antennas in the context of broadband interference plays a vital role. In order to improve the efficiency of anti-interference research, the simulation problem of digital Intermediate Frequency(IF) signal at the entrance of satellite navigation software receiver is studied by Matlab. Firstly, power control is performed according to the signal to interference and noise ratio. Then satellite navigation signals, interference signals and noise signals are modeled separately. And then the delay caused by the array antenna is calculated. Finally, the satellite signals of the array antenna in the background of broadband interference are simulated and the Graphical User Interface(GUI) is designed. After the simulation, the signal is input into the research system of the anti-interference algorithm. It implements the complex interference signal source simulation in anti-interference research, improves its efficiency and verifies its practicability and correctness.