摘要
在高速数据采集系统中,对数据进行直接处理非常困难,一种可行的方法就是采用数字下变频(DDC)的技术,将高速数据流变成当前可实时处理的中低速数据流。本文介绍了在软件无线电领域中广泛使用的数字正交下变频器AD6620在嵌入式Linux操作系统下硬件接口和驱动程序的设计。为提高系统的实时响应性能和多任务处理能力,在硬件上采用ARM9微处理器技术,通过采集、解调和显示调幅信号验证了该设计的正确性。整个设计过程充分体现了嵌入式Linux快速开发的特点。
In the high speed data acquisition system, it is difficult to process data directly. There is a probable method by using the DDC technology, which is a method that converting the high speed data flow into the low speed data flow. This paper presents a design of hardware interface and device drivers for a DDC device AD6620 which is widely used in software radio area, the design is on the platform of embedded Linux operating system. To improve the real time responds and multi-tasks processing ability of the system, the ARM9 microprocessor is used, though acquire, demodulate and display the AM signal to certify the correctness of the design. The fast exploitation characteristics of the embedded Linux are presented in the whole design procedure.
出处
《电子测试》
2009年第3期58-62,90,共6页
Electronic Test
