软件无线电中的多速率信号处理

The Multi-rate Signal Processing in Software Radio

介绍了软件无线电和多速率信号处理的概念,多速率信号处理能够改变软件无线电系统不同节点处的信号速率。多速率信号处理最基本的两种方法是抽取和内插,分析了他们的原理,并给出了相应的多相滤波结构。多相滤波器组使各个支路滤波器的阶数降至1/D(1/I),是实现信号实时处理的有效途径。

In this paper,the conception of software radio and multi- rate signal processing is introduced. The signal code rate at every node in the system of software radio may be changed by multi - rate signal processing. Decimation and interpolation are two basic means of multi -rate signal processing, the theory of them is analysed and their related architecture of poly phase filer is given here. The number of digital filter＇s steps at every branch of this architecture will be reduced to 1/D（or 1/I） of the original, So this architecture is an effective way to real - time signal processing.