任意中频带通信号多相数字下变频方法
Polyphase based digital downconvertion of random if signals
-
摘要: 基于多相结构的数字下变频方法由于其可实现性强,抗干扰能力强等优点,在电子系统软件化的趋势中得到越来越多的重视。其缺点是存在信号接收盲区。该文在多相滤波数字下变频方法的基础之上,提出了一种改进方法。该方法在不改变原有下变频器结构的前提下,实现监视带内任意中频位置带通信号接收,消除接收盲区。
-
关键词:
- 多相滤波; 下变频; 带宽; 盲区
Abstract: Polyphase based digital downconvertion is widely used in software electronic system design because it is easy to be realized and also has anti-jamming ability. But this method has blind frequency zone. This paper proposes a new method based on polyphase digital downconvertion which can eliminate the blind frequency zone and realize the receiving of any IF bandpass signal without changing the structure. -
杨小牛等,软件无线电原理与应用,北京,电子工业出版社,2001年,4.2节,5-7.[2]Joseph Mitola, III, Software radio architecture: A mathematical perspective, IEEE J. on Selected Areas in Communications, 1999, 17(4), 514-538.[3]R.G. Vaughan, The theory of bandpass sampling, IEEE Trans. on SP, 1991, 39(9), 1973-1984.[4]胡广书,数字信号处理,北京,清华大学出版社,1998年4月,290-293.[5]J. Fudge, M. Legako, C. Sehreiner, An approach to efficient wideband digital downconvertion,Proc. ICSPAT, Toronto, Canada. 1998, 713-717.[6]高志成,肖先赐,宽带数字下变频的一种高效实现结构,电子与信息学报,2001,23(3),255-260.[7]P.P. Vaidyanathan, Multirate digital filters, filter banks, polyphase networks, and applications:A tutorial, Proc IEEE, 1990, 78(1), 56-93. -
计量
- 文章访问数: 2165
- HTML全文浏览量: 145
- PDF下载量: 825
- 被引次数: 0
下载:
