摘要
在电子战系统中为了拓展信号处理带宽越来越多地采用I/Q变频体制,但是,在IQ变频体制中,当变频后的中频信号频率接近零时,信号检测和处理存在一些困难,有可能使系统性能下降。文章分析了IQ变频体制中零中频点对信号截获和干扰的影响,提出了改进措施,并对其可行性进行了分析,在改进零中频处理缺陷方面进行了有益的探索。
Nowadays, there＇s a trend to apply the I/Q frequency conversion system in EW field. However, there＇ s some difficulty in radar signal detecting and processing when the signal＇ s intermediate frequency approaches zero, which may result in sacrifice of some of the system＇ s performance. In this paper, the influence of zero IF signal of L/Q frequency conversion on signal intercepting and jamming is analyzed, and an optimized method is considered to improve the performance of radar EW system. The feasibility is also researched.
出处
《电子信息对抗技术》
2008年第3期18-21,70,共5页
Electronic Information Warfare Technology
