新型软件无线电正交同步采样方法  

New Solution of In-phase and Quadrature Components Synchronous Sampling Based on Software Radio

作　　者：方正[1,2] 乔卫民[2] 龙银东[1,2] 敬岚[2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《微计算机信息》2008年第36期205-206,共2页Control & Automation

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.

关 键 词：软件无线电 同步采样 AD6645 

分 类 号：TN850.6[电子电信—信息与通信工程]