當前正處于數字信息化時代,隨著第三代移動通信體制逐漸建立,各種通信系統都向著綜合化,寬帶化方向發展。因此,人們對信息的需求量以及數據的傳輸速度要求也越來越高。數字信號處理技術現已被廣泛應用語音圖象處理、數字通訊、自動控制等領域。基帶脈沖成型技術也是數字信號處理的一種,這種技術已廣泛運動到各種數據傳輸系統中去了。如TD-SCDMA,WCDMA,UWB(Ultra Wide Band)等通信系統。因此,脈沖成型濾波器的設計在通信系統中占有非常重要的地位, 它的性能將直接影響整個通信系統的性能指標。
本文就在研究濾波器的基礎上,詳細探討脈沖成型濾波器的可行之法。最后采用CPLD,選取其中一塊MAX II 系列芯片——EPM570T144C5實現。
關鍵詞:數字信號處理技術, 基帶脈沖成型濾波器 ,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