【摘要】 天线抗干扰技术和扩展频谱抗干扰技术是卫星通信系统提升抗干扰能力的重要技术手段。文章针对静止轨道卫星通信系统抗干扰计算分析难度大的问题，引入卫星天线增益计算模型，提出一种抗干扰计算分析方法。对卫星、用户站和干扰站的空间几何关系进行建模，根据卫星天线方向图数据准确计算卫星天线对用户站和干扰站的接收增益，进而得出信号和干扰的载干比；同时，在卫星通信链路计算中引入载干比，准确计算上行链路的总载噪比和总链路余量。通过设计典型干扰场景，分析影响系统总链路余量的关键因素，优化权衡天线抗干扰和扩展频谱抗干扰关键指标，能够从系统整体提升抗干扰能力，满足系统抗干扰要求。更多还原

【Abstract】 Antenna anti-interference technology and spread spectrum anti-interference technology are important technical means to improve the anti-interference capability of satellite communications system. Aiming at the difficulty of interference calculation and analysis of geostationary sa tellite communications system, the satellite antenna gain calculation model is introduced in this paper, and a new interference calculation and analysis method is proposed. The spatial geometric relationship of satellite, user station and interference stations is modeled, and the receiving gain of satellite antenna to user station and interference stations is accurately calculated according to the satellite antenna pattern data, and then the carrier interference ratio of signal and interference is obtained; At the same time, the carrier to interference ratio is introduced into the satellite communications link calculation to accurately calculate the total carrier to noise ratio and total link margin of the uplink. By designing typical interference scenarios, analyzing the key factors affecting the total link margin of the system, optimizing and balancing the key indicators of antenna anti-interference and spread spectrum anti-interference, the anti-interference ability of the system can be improved as a whole to meet the anti-interference requirements of the system.更多还原