Design And Implementation Of Communication System Based On FPGA

With the development of communication technology and service,telecommunication network is developed towards the direction of Broadband Integrated Services Digital Network(B-ISDN).In this situation,communication network and switching equipment is required to accommodate both non-real-time data services and real-time television and telephone signal services.Under such demand,the accuracy of business information and information transmission rate is very important.In this thesis,based on the physical Layer,ATM Transfer Mode(ATM)Layer,AAL5(ATM Adaptation Layer 5)Adaptation Layer and high level of B-ISDN protocol,a communication system that can transmit two-way service information is designed and implemented.Tests on continuous processing of data show that,when the size of test data is less than 30 GB,the bit error rate of the communication system is 0,the cell loss rate is 0,and the rate of sending and receiving business information is up to 120 Mbps.At the same time,the design and implementation of the communication system in this thesis is of high portability and applicability and a high guiding significance to the later development.The main work of this thesis is as follows:Firstly,the protocol of B-ISDN is introduced,the content of B-ISDN is analyzed.According to the layered characteristics of the protocol,this thesis adopts "physical layer +ATM layer +AAL5 adaptive layer + high layer" as the main structure of the communication system.Secondly,based on the FPAG working environment,combined with the main structure of the communication system,the hierarchical relationship between the physical layer,ATM layer,AAL5 adaptation layer and the high layer is studied.And these layers are designed respectively.Again,the working principle and design scheme of each level are analyzed.Based on HDL language,the RTL design and integration of each module are completed.Finally,functional verification is performed in the context of Universal Verification Methodology(UVM).The prototype of the communication system is verified based on FPGA.The performance of the communication system is tested under the test board environment.