摘要
应用调制理论分析了射频脉冲信号受寄生调制的影响而产生的边带相位噪声,提供了相位噪声测量的理论和实际应用技术,介绍了测量发射机相位噪声的概念和方法。分析时包括用Woodword注记法表示的脉冲频谱的背景分析以及噪声边带对探测目标的影响。具体提出了直接用分辨率比较高的高性能频谱分析仪测量发射机的相位噪声是可行的,最后给出了某型S波段脉冲多普勒天气雷达发射机相位噪声的测试结果。
Modulation Theory is employed to analyze the side phase noise generated from radio-pulse signal influenced by incidental phase modulation. In addition to the measurement theory and practical application technique of phase noise, the concept and measurement method of transmitter phase noise are introduced. The effect of noise side on object detection and background pulse spectrum analysis presented in Woodword is described. It is practical to measure phase noise from transmitter by means of a fine frequency spectrum analyzer. A measurement result of a S-band pulse Doppler weather radar is also given in the paper.
出处
《现代雷达》
CSCD
北大核心
2005年第7期62-66,共5页
Modern Radar
关键词
相位噪声
极限改善因子
调制
频谱
phase noise
limit improvement factor
modulation
frequency spectrum
