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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。
The anti-jamming performance of the aviation surveillance system is of great significance for the protection of air traffic safety. In recent years, the rapid development of aviation industry has promoted the emergence of a variety of monitoring technologies that will coexist for a long period of time. Both of these monitoring technologies use the downlink frequency of 1090 MHz, causing signal crowding at 1 090 MHz This poses new challenges for improving the anti-jamming performance of the aviation surveillance system. The various forms of co-channel interference of the 1 090 MHz frequency signal are analyzed. For the interference caused by omission of the monitoring system, the aliasing of the A / C mode response signal, the S mode response signal and the 1090 ES signal in different situations is deduced Probability, and simulate and evaluate system performance in the hypothetical ideal environment.