TD-SCDMA中FIR滤波器的DSP实现

DSP Implementation of FIR Filter in TD-SCDMA

文中首先说明了TD-SCDMA标准中对FIR滤波器的性能要求。同时以TD-SCDMA中的FIR滤波器为例,说明了数字滤波器的基本原理,讨论了如何应用MATLAB进行数字滤波器的设计,以及数字滤波器的DSP实现的基本思想,在实现过程中与MATLAB的结合。针对TI公司TM320C55X系列芯片进行汇编语言设计,平衡了设计精度和存储空间的要求,具有占用存储空间少,运行速度快的优点,更好地适应实时滤波的场合。

This paper describes the FIR filter performance requirements of the TD-SCDMA standard. Taking the TD-SCDMA FIR filter as an example, it explains the basic principles of digital filter, discusses how to use MATLAB for digital filter design, the basic idea for DSP Digital Filter design and its combination with MATLAB in the realization process. Aiming at TI TM320C55X series chip, assembly language design is implemented, and the requirement of design accuracy and storage space balanced. It has the advantages as less occupation of storage space, faster operation, and fairly adaptable to the real-time filtering occasions.