1090MHz信号同频干扰与窜扰概率探究

Exploration on 1090MHz Co-channel Interference and Probability of Garble

航空监视系统的抗干扰性能对于保障空中交通安全具有十分重要的意义。近年来,航空工业的迅猛发展促进了多种监视技术的出现,并将在相当长一段时间内同时存在,这些监视技术均使用1 090 MHz的下行频率,造成了1 090 MHz频率的信号拥挤问题,这对于提高航空监视系统的抗干扰性能又提出了新的挑战。分析了1 090 MHz频率信号的各种同频干扰形式,针对容易导致监视系统漏检的窜扰,推导出A/C模式应答信号、S模式应答信号和1090ES信号之间在不同情况下的混叠概率,并在假定的理想环境下对系统性能进行仿真与评估。

Anti-jamming performance of the aviation surveillance system is of great significance in ensuring the air traffic safety. In recent years, the rapid development of aviation industry promotes the emergence of various surveillance technologies, and these technologies would simultaneously exist for quite a long time. These surveillance technologies all adopt the same downlink frequency of 1 090MHz, thus resulting in the signal congestion, and this becomes a new challenge to the improvemeent of anti-jamming performance of the system. This paper first analyzes the co-channel interferences of 1 090 MHz, and then deduces the garble probability of mode A/C, mode S and 1090 ES signals in different situation. Based on the assumed ideal environment, the system performance is simulated and evaluated.