振动对BiSAR频率基准源影响及其补偿技术研究  

Study on the Impact and Compensation Technology of Crystal Oscillator on BiSAR

作　　者：陈亮朋 单庆晓[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《压电与声光》2013年第6期858-861,共4页Piezoelectrics & Acoustooptics

摘　　要：双站合成孔径雷达具有高分辨率、隐蔽性强等优点,但其严重依赖于收发系统的频率基准源。晶体振荡器因其突出的性能在合成孔径雷达中作为频率基准源得到广泛使用,但其受振动、冲击等影响较大。该文从分析晶振相位噪声特性开始,讨论了频率源稳定性对双站合成孔径雷达(BiSAR)成像的影响,并重点介绍了一种晶振加速度的全数字补偿技术,在4g@15Hz下实现了12dB的补偿效果。BiSAR has plenty of advantages,such as high imaging quality and easy concealing,but it seriously depends on frequency sources of the sender and receiver.As frequency source,crystal oscillator is widely used on composed aperture radar for its outstanding performance; but it is sensitive to vibration and impact and so on.This paper started with analyzing the noise characteristic of oscillator,and then the effect on SAR imaging of the stability of frequency sources was studied.An effective method for acceleration compensated was introduced,achieving improved compensation of 12 dB at 4 g@15 Hz phase noise.

关 键 词：晶体振荡器 相位噪声 数字补偿 加速度补偿 双站合成孔径雷达(BiSAR) 

分 类 号：TN95[电子电信—信号与信息处理]