摘要
针对传统数字正交变换存在A/D采样速率要求比较高导致后续的数字低通滤波成为瓶颈、运算数据量大、需要正交本振等方面的不足,提出了一种基于软件无线电多相滤波的数字正交变换技术。首先分析基于多相滤波的数字正交变换的实现理论,实现模型,然后设计由于奇偶抽取引起的多相滤波器中的两个延时滤波器,最后在MATLAB/SIMULINK下建模仿真。实验仿真结果表明,用该方法设计的正交变换满足要求。
According to the shortcomings in traditional digital orthogonal transformation such as digital low-pass filter becomes a bottleneck for higher A/D sampling rate,large amount of computing data, needing for quadrature local oscillation and so on,digital orthogonal transformation technology based on polyphase filtering in software radio is introduced. Firstly,it gave an analysis of the principle of digital orthogonal transformation based on polyphase filtering and put forward a new implementation model,then two delay filters which due to even-odd extraction through by one polyphase filter were designed,finally modeling and simulation in MATLAB/SIMULINK were realized. The experimental results show that the design of orthogonal transformation in this way meets the requirements.
出处
《电子设计工程》
2010年第6期89-92,共4页
Electronic Design Engineering
基金
广西信息与通讯技术重点实验室基金项目(10911
10913
10904)
关键词
软件无线电
多相滤波
正交变换
奇偶抽取
software radio
polyphase filtering
orthogonal transformation
even-odd extraction
作者简介
江春燕（1984-），女，江西九江人，硕士研究生。研究方向：软件无线电。
