摘要
介绍了软件无线电中数字下变频的原理和实现过程,以及Intersil公司生产的DDC芯片ISL 5416可编程数字下变频器的结构和工作过程,在此基础上,以多通道相关干涉仪系统作为应用背景,对其中数字下变频器件在不同工作带宽下的输出数据进行了分析,说明了ISL 5416能灵活地实现多种带宽下的信号下变频,为解决软件无线电中的可变带宽数字下变频提供了解决方案。
The principle and the application of digital down conversion based on software radio are described in this article. The structure and working process of programmable digital down conversion （DDC） chip ISL 5416 from Intersil Company are analyzed. Also with multi-channel correlative interferometer as the application background some research on the output data of digital down conversion at different band wide is done. This article presents a flexible way for realizing DDC with ISL5416 and provides a solution for alterable bandwide DDC in software radio.
出处
《信息安全与通信保密》
2010年第7期54-56,共3页
Information Security and Communications Privacy
