摘要
本文主要阐述了新型的软件无线电I、Q两路同步采样方法,主要利用了平方律部件、一阶环路滤波器和NCO来对I、Q两路采样时间差的进行闭环控制,实现了实时同步采样,降低了对AD芯片采样速率要求,同时也为后续的基带信号处理提供了方便。该设计主要用于兰州重离子加速器冷却存贮环的主环(CSRm)的重离子束团踢轨(Kicker System)的精确控制。
This paper primarily elaborates a new method of in-phase and quadrature components synchronous sampling that based on software radio. It mainly uses the square unit,first-order loop filer and numerical control oscillator to implement the closed-loop control of the in-phase and quadrature components sampling time difference. Therefore,the system makes the In-phase and quadra-ture components synchronous sampling come true. It decreases the high sampling frequent needs of the analogue to digital converter,meanwhile it is convenient for the following base-band signal processing. It is designed for the Cooling Storage Ring of Heavy Ion Cyclotron System in Lanzhou to control heavy ion beam extraction from its orbit precisely.
出处
《微计算机信息》
北大核心
2008年第36期205-206,共2页
Control & Automation
