当前正处于数字信息化时代,随着第三代移动通信体制逐渐建立,各种通信系统都向着综合化,宽带化方向发展。因此,人们对信息的需求量以及数据的传输速度要求也越来越高。数字信号处理技术现已被广泛应用语音图象处理、数字通讯、自动控制等领域。基带脉冲成型技术也是数字信号处理的一种,这种技术已广泛运动到各种数据传输系统中去了。如TD-SCDMA,WCDMA,UWB(Ultra Wide Band)等通信系统。因此,脉冲成型滤波器的设计在通信系统中占有非常重要的地位, 它的性能将直接影响整个通信系统的性能指标。
本文就在研究滤波器的基础上,详细探讨脉冲成型滤波器的可行之法。最后采用CPLD,选取其中一块MAX II 系列芯片——EPM570T144C5实现。
关键词:数字信号处理技术, 基带脉冲成型滤波器 ,CPLD, EPM570T144C5
Abstract
Nowadays we are in the age of digital world, as the third generation of mobile communications standards come to establishment, kinds of communications systems is developed to be synthetically and broad band. Consequently, amount of information and the speed of data transferring is greatly demanded. For the time being, digital signal processing technology is well employed in audio and video process, digital communications, auto control and so forth. Baseband pulse shaping technique is one of the digital signal processing technology, which has been extensively used in sorts of data transferring systems, like TD-SCDMA,WCDMA,UWB(Ultra Wide Band)and other communications system. Therefore, design of pulse shaping filter is playing a crucial part of role in most communications system, and its performance will exert a great influence on the whole communications system.
Based on the study of filters, this thesis is to delve into the pulse shaping filters and its feasible realization. Finally we choose one of the CPLD chip -EPM570T144C5 to fulfill this task, which belongs to the family of MAX II.
Keywords: digital signal processing technology , Baseband pulse shaping filter ,CPLD , EPM570T144C5