Design And Implement On Encoding And Decoding Module For Wireless Communication Systems

With the development of the technology of "Internet of Things",technologies like RFID(Radios Frequency Idetification) as the most extensive application have been extremely rapidly developed,at present RFID has large_scale applications in many fields.RFID is a non-contact automatic identification technology.RFID system is composed of a reader and numbers of tags,it controls,detects and tracks the objects.In this thesis,on the basis of the RFID reader baseband system architecture,encode/decode methods and avoiding collision algorithms and their relative technologies developed in these fields,we realize the system and module design of the key technology of the RFID reader digital baseband based on EPC C1G2 protocols.In this thesis,the modules of the digital baseband has been designed,including PIE encoding and decoding,FM0 encoding and decoding,Miller encoding and decoding,CRC5/16 check,FIR and IIR channel filter,sampling circuit,selecting Q value,avoiding collision algorithms using brinary searching.Most modules have been implemented using QuartusⅡ7.2 and Modesim SE6.0 which load program on target device EPC20CF484C8N analysis and synthesis.By means of SignalTapⅡthese modules's functions are verified.FIR(Finite Impulse Response) and IIR(Infinite Impulse Response) channel filter is optimized only by function simulation.As a result reader reads the tag's information that is stored in tag's memory.The tag's relative information displays in the computer through serial communication.Reader and tag complete the simple process of reading the tag's information.