摘要
目前对射频信号进行A/D转换存在很大难度,主要采用多片A/D器件并行使用,实现高速数据采集。带通采样技术含有同时调制信号和降低信号速率两种作用,鉴于此前端设计一种基于带通采样定理的SHA抽取器,后端加入表决系统,提出一种基于带通采样定理的高效ADC系统,经理论分析该结构切实可行,对于降低数据采样率和提高数据转换效率有一定的借鉴意义。
It is difficult to sample directly radio frequency signal because of lower capability of ADC now.In order to remove it,we use several ADC chip through side by side.Band-pass sampling theorem can modulate signal and also have lower speed of signal.So a kind of SHA model based on band-pass sampling theorem is presented,and add a judgment system,we call this system is based on band-pass sampling theorem of ADC system.The structure and effectiveness are proved.It is useful for lower speed of sampling and improving the effect ness of transmission.
出处
《舰船电子工程》
2011年第3期98-100,共3页
Ship Electronic Engineering
