摘要
多基站数字阵雷达面临信号远距传输、时序同步与信号分集等技术难题。本文针对MSDAR构建了具有较强适用性的光纤同步系统。该系统采用信号分级同步策略对时序信号逐级同步,精度可达纳秒量级。采用多级复用技术显著提高单纤信道传输容量以解决MSDAR信号分集问题。本文分析了影响光纤传输同步性的诸方面因素,结合数字阵雷达原理建立了信号同步性对雷达性能影响的关系模型。详细分析了同步性对雷达波束指向影响。结果表明光纤同步系统若满足MSDAR系统需求,须折中考虑系统工作频率、带宽、通道等系统参数,定量的结果可由模型给出。
Multi-station digital array radar （MSDAR） confronts with several puzzles such as distant transmission, timing synchronization, signal distribution and collection. A universal fi- bre-optic transmission synchronization and signal diversity system is architected, which ex- ploits hierarchical synchronization approaches to achieve precise synchronization of nanosecond magnitude. Hierarchical channel multiplex techniques are designed to promote the fibre-optic channel capacity to address the signal diversity difficulties of MSDAR. Based on the analysis of effects on synchronization and the characteristics of digital array radar （DAR）, the mathematic models of the relationship between synchronization and radar performances are built. Accord- ing to the models, the beam pointing errors are estimated. The theoretical analysis and simula- tion results indicate that the fibre-optic transmission synchronization system can satisfy high frequency MSDAR, but with the increase of operation frequency and bandwidth, the effects will be more serious and the quantitative results can be calculated on the models.
出处
《数据采集与处理》
CSCD
北大核心
2013年第4期466-470,共5页
Journal of Data Acquisition and Processing
基金
国家自然科学基金(61071164
61271327
61071163)资助项目
南京航空航天大学科研业务基金(3082012NN2012046)资助项目
关键词
多基站数字阵雷达
光纤传输
信号同步
数字波束形成
multi-station digital array radar （MSDAR）
fibre-optic transmission
signal syn-chronization
digital beam forming
