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对有威胁的信号进行分析的能力,始终是衡量监视或预警接收机效率的最基本标准。技术要求一般包括三点:监控电磁波频谱带宽,识别上述频带内可能出现的任何信号的有用特性以及用这些信息鉴别信号源和信号特性。多年来,一直是用传统的电子情报和雷达预警接收机来截获射频信号。虽然宽带晶体视频和窄带超外差接收机在特殊应用上有其优点,但它们在当今高密度混杂的电磁波环境下工作也有局限性。当所关心的频带包含大量不同振幅和调制型式的信号时,就会产生一些难题。如果信号是持续时间较短的脉冲,则上述困难也就解决了。此外,为了更加难以探测和鉴别,还专门设计了一些调制法,例如频率跃变和扩展频谱法。这种迷惑方法使传统的搜集技术的能力
The ability to analyze threatened signals is always the most basic measure of the efficiency of a surveillance or early warning receiver. The technical requirements generally include three points: monitoring the electromagnetic spectrum bandwidth, identifying the useful characteristics of any signal that may appear in the above bands, and using this information to identify the source and signal characteristics. For many years, radio frequency signals have been intercepted using conventional electronic intelligence and radar warning receivers. While broadband crystal-video and narrow-band super-heterodyne receivers have their advantages for special applications, they also have limitations in today’s high-density hybrid electromagnetic environments. When the band of interest contains a large number of signals of different amplitude and modulation types, some challenges arise. If the signal is a short duration of the pulse, the above difficulties will be solved. In addition, in order to more difficult to detect and identify, but also specially designed some modulation methods, such as frequency jump and spread spectrum method. This deceptive approach enables the traditional ability to collect technology