数字滤波器设计稿译文原文毕业设计稿（专业论文）.docxVIP

附件D：FPGA IMPLEMENTATION OF DIGITAL FILTERSChi-Jui Chou, Satish Mohanakrishnan, Joseph B. EvansTelecommunications& Information Sciences LaboratoryDepartment of Electrical & Computer EngineeringUniversity of KansasLawrence, KS 66045-2228ABSTRACTDigital filtering algorithms are most commonly implementedusing general purpose digital signal processing chips for audioapplications, or special purpose digital filtering chips and application-specific integrated circuits (ASICs) for higher rates. Thispaper describes anapproach to the implementation of digital filteralgorithmsbased onfield programmable gate arrays (FPGAs).The advantagesof the FPGA approach to digitalfilter implementationincludehigher sampling rates than are availablefromtraditional DSP chips,lowercosts than an ASIC for moderatevolumeapplications, andmoreflexibility than the alternateapproaches.Since many current FPGA architectures are in-systemprogrammable, the configuration of thedevice may be changedto implement differentfunctionality if required. Our examplesillustrate that the FPGA approachis both flexible and providesperformance comparable or superior totraditional approaches.1. INTRODUCTIONThe most common approaches to the implementation of digitalfiltering algorithms are general purpose digital signal processingchips for audio applications, orspecial purpose digital filteringchips andapplication-specific integrated circuits (ASICs)for higher rates [9, 14]. This paper describes an approach to theimplementation of digital filter algorithms on field programmablegate arrays (FPGAs).Recent advances in FPGA technology have enabled these devicesto be applied to a variety of applications traditionally reservedfor ASICs. FPGAs are well suited to datapath designs,such as those encountered in digital filteringapplications. Thedensity of the new programmable devices is such that a nontrivialnumber of arithmetic operations such as those encounteredin digital filtering may be implemented on a single device. Theadvant