在高密集、高交错的复杂雷达信号环境下,进行实时雷达信号分选处理技术是新一代雷达截获接收机信号处理的关键技术,也是电子战领域一个亟待解决的问题。文中通过对盲信号抽取(BSE,Blind Signal Extraction)技术的分析研究,并将其应用于...在高密集、高交错的复杂雷达信号环境下,进行实时雷达信号分选处理技术是新一代雷达截获接收机信号处理的关键技术,也是电子战领域一个亟待解决的问题。文中通过对盲信号抽取(BSE,Blind Signal Extraction)技术的分析研究,并将其应用于雷达信号分选中,通过仿真实验证明:在日趋密集、复杂的电磁信号环境中,盲抽取技术能较好地解决传统雷达信号分选方法所存在的不足和局限性。展开更多
A balanced optical microwave phase detector(BOMPD) based on a 3 × 3 coupler is presented. This system was developed to extract ultra-low-jitter microwave signals from optical pulse trains emitted by mode-locked E...A balanced optical microwave phase detector(BOMPD) based on a 3 × 3 coupler is presented. This system was developed to extract ultra-low-jitter microwave signals from optical pulse trains emitted by mode-locked Er-fiber lasers, and synchronized microwave and laser systems. We demonstrate that the BOMPD achieves a precision of synchronization of less than 100 femtosecond of timing jitter. The experimental setup can be applied to the soft X-ray free-electron laser located on the campus of the Shanghai synchrotron radiation facility. A microwave signal with a 2.856 GHz frequency is extracted from a238 MHz mode-locked Er-laser, with an absolute timing jitter of 34 fs in the 10 Hz–10 MHz frequency offset range.In addition, the microwave and 238 MHz optical pulse signals are synchronized with a relative timing jitter of16 fs at the same frequency offset range.展开更多
文摘在高密集、高交错的复杂雷达信号环境下,进行实时雷达信号分选处理技术是新一代雷达截获接收机信号处理的关键技术,也是电子战领域一个亟待解决的问题。文中通过对盲信号抽取(BSE,Blind Signal Extraction)技术的分析研究,并将其应用于雷达信号分选中,通过仿真实验证明:在日趋密集、复杂的电磁信号环境中,盲抽取技术能较好地解决传统雷达信号分选方法所存在的不足和局限性。
基金supported by the National Natural Science Foundation of China(No.11175241)
文摘A balanced optical microwave phase detector(BOMPD) based on a 3 × 3 coupler is presented. This system was developed to extract ultra-low-jitter microwave signals from optical pulse trains emitted by mode-locked Er-fiber lasers, and synchronized microwave and laser systems. We demonstrate that the BOMPD achieves a precision of synchronization of less than 100 femtosecond of timing jitter. The experimental setup can be applied to the soft X-ray free-electron laser located on the campus of the Shanghai synchrotron radiation facility. A microwave signal with a 2.856 GHz frequency is extracted from a238 MHz mode-locked Er-laser, with an absolute timing jitter of 34 fs in the 10 Hz–10 MHz frequency offset range.In addition, the microwave and 238 MHz optical pulse signals are synchronized with a relative timing jitter of16 fs at the same frequency offset range.
