【作者】 张佳炜；

【导师】 龙海南；

【作者基本信息】 河北大学 ， 通信与信息系统， 2005， 硕士

【摘要】 扩频通信系统与常规的通信系统相比,具有很强的抗人为干扰,抗窄带干扰,抗多径干扰的能力,并具有信息隐蔽、多址保密通信等特点。本论文主要讨论和实现了基于FPGA 的扩频通信系统的发送端部分。论文对扩频通信系统和FPGA 设计方法进行了相关研究,,用通信仿真软件SystemView 对系统进行了仿真,并且用Altera 公司的最新的FPGA 开发平台MAX+plusII 实现了一个基带扩频通信系统的发送端部分,最后用软件Protel99SE 设计了相应的硬件电路。该系统的设计主要分为两个部分。第一部分是用MAX+plusII 软件设计了系统的VHDL 语言描述代码,并对系统中每个模块和整个系统进行相应的功能仿真和时序时延仿真;第二部分是设计了以FPGA 芯片EPF10K10LC84-3 为核心的系统硬件电路,并进行了相关测试,完成了预定的功能。论文的第一章介绍了扩频系统的特点以及相关扩频芯片的国内外发展现状,并介绍了本论文的研究思路和内容。第二章主要介绍了论文所涉及的一些理论背景。主要是扩频系统的相关解扩、基带解调、同步以及扩频系统中的调制与解调技术。第三章介绍了通信仿真软件SystemView,并用该软件对扩频通信系统的模型进行了仿真。第四章介绍了现场可编程门阵列FPGA 的主要原理,并说明了本系统使用的FPGA 芯片是如何确定的。第五章介绍了硬件描述语言VHDL 和Altera 公司的开发平台MAX+plusII。第六章给出了扩频通信系统的总体设计,包括软件部分和硬件部分。第七章主要介绍了系统设计时遇到的问题和解决的办法,以及本人在MAX+plusII中应用VHDL 进行设计时一些经验总结。第八章主要是对论文工作的一些总结和对今后工作的展望。附录中是论文中涉及到的电路设计原理图。更多还原

【Abstract】 The spread spectrum communication system has stronger ability of resisting jamming,narrow band,and multipath interference than that of the conservation communication systems.And it also has the characteristics of low probability of intercept and multiple access secure communication.This thesis primarily discussed the sending side of the spread spectrum communication system based field programmable gate array(FPGA) ASIC chip.The design technique of FPGA related to communication system has been discussed in this thesis ,and this system has been emulated by communication emulation software SystemView.Finally,the sending side of the spread spectrum system has been designed and implemented based on the FPGA development platform MAX+plusII belonging to the Altera Company and the corresponding circuit has been designed by Protel99 software. The total system can be divided into two parts.In the first part the program by VHDL language of the total system has been edited and compiled ,and the function emulation and time emulation of the separate module of the system and total system has been made by MAX+plusII.In the second part,the circuit board of the system based in FPGA chip EPF10K10LC84-3 has been designed and tested,finally has implemented appointed function. Chapter one introduces the characteristics of the spread spectrum communication system and the development related to spread spectrum ASIC chip at present in the world.It also introduces the outline and the research idea of the thesis. Chapter two mainly introduces the background related to the theory.It contains the despread spectrum,baseband demodulation,synchronization and the technology of modulate and demodulate in the spread spectrum system. Chapter three introduces the communication emulation software SystemView and emulate the model of spread spectrum with it. Chapter four illuminates the basic principle of Field Programmable Gate Array(FPGA) and how to select the FPGA chip applied in this system. Chapter five introduces VHDL hardware description language and MAX+plusII,which is the development platform of Altera Corp. Chapter six expatiate the total design of the system,include the software unit and the更多还原