1.8 Major ELINT Signal Parameters ELINT信号的主要参数

 

The typical radar signal can be analyzed according to its power (Chapter 7), antenna (Chapters 8 and 10), and carrier modulation characteristics (Chapter 14). There are many receiver characteristics of interest as well, but these cannot be obtained directly from ELINT. The power characteristics include any variations in the power. The antenna characteristics include the observed polarization beam patterns and the angular motion (scanning) of the beam. The modulation characteristics can be divided into the more usual pulsed types and CW types. Pulse modulation includes both the envelope and intrapulse frequency or phase modulation (Chapter 11), and pulse interval characteristics (Chapter 12). The radio frequency, or carrier, characteristics are of importance, including the carrier frequency used, as well as any intentional variations such as frequency agility. Also of interest are measures of incidental variations in the frequency (or phase), which are measures of RF coherence.

 

作者将ELINT信号的参数分为了三类，第一类是信号的功率，第二类是天线特性，第三类是调制特性。应该说还有一类，那就是空间位置特性。

 

  When measuring any of these parameters, two problems must be addressed: separating the signal of interest from the rest of those signals in the environment, and statistically determining parameter ranges for radar sets of a given type. Brief discussions of these two subjects are included in Chapters 13 and 15. Finally, Chapter 16 briefly describes some uses of ELINT data files including their use in radar warning receivers.

 

测量参数之前的重要一步是从空间接收信号中分离出感兴趣的波形。

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