【作者】 王哲；

【导师】 于慧敏；

【作者基本信息】 浙江大学 ， 信号与信息处理， 2003， 硕士

【摘要】 DSP芯片自20世纪80年代诞生以来，取得了飞速发展。随着DSP芯片性价比和开发手段的不断提高，DSP已经得到了广泛应用。尽管对于现在DSP的开发，已经可以借助于由联合测试行动组(JTAG)开发的IEEE1149.1-1990边界扫描技术规范方便的进行在线调试，但对于早期不含JTAG接口的16位DSP，由于其仍有广泛的应用场合，因此开发与这些DSP相适应的硬件仿真器也是必不可少的。本文就是针对这种情况，为苏州旺宏公司不含JTAG接口的16位DSP芯片，设计相应的硬件仿真器。 本文前五章是针对硬件仿真器的设计而言，阐述了整个仿真器的设计思想和方法，从整体到部分一一介绍。第一章介绍仿真器的结构、应用范围和近年来的发展，对仿真器设计中涉及的USB、FPGA、电路设计等多方面的知识进行介绍；第二章介绍仿真器整体的设计结构和所采用的硬件实现方案，分为硬件实现和接口设计两部分；第三章介绍仿真器与主机之间采用的USB接口的设计方案，分工作原理、开发平台介绍和模块实现三部分；第四章介绍仿真器的逻辑控制功能及其CPLD实现方案，分工作原理和模块实现两部分；第五章对做好的仿真器进行调试，编写Windows客户端程序，实现仿真器控制功能，分调试步骤和调试程序功能介绍两部分。 第六章是作者研究生期间所完成的另一项科研任务：对软件无线电体系结构中的数字下变频器(DDC)进行改进。目的是通过应用一种改进后的低比特位∑—Δ调制器，降低DDC实时处理的复杂性和减小硬件实现的规模，同时提高DDC的工作频率，从而进一步提高接收机的中频信号频率。通过进行原理性的仿真论证，说明这种方法是行之有效的。更多还原

【Abstract】 It has been many years since the DSP was invented in the eighties of the twentieth century. With the development of technology, DSP has been applied in more and more areas. The development of modern DSP often makes use of the JTAG interface on chip to test and debug in circuit, the JTAG, a group of criterions established by Joint Test Action Group (JTAG), from IEEE1149.1 to 1990. But for traditional DSP without JTAG interface, which still has been used widely, it is necessary to develop a emulator. The emulator, also called extended development system, can be used to test and debug the traditional DSP. The purpose of the paper is to design a emulator for MX1C’ s DSP without JTAG.The first five chapters are used for the emulator design. The first chapter is summarize, which introduces the development of emulator and the technology associated the design, USB, FPGA/CPLD, etc. The second chapter introduces the whole hardware design and realization. The third chapter explains how the emulator communications with the host through USB interface. The fourth chapter shows how to design CPLD as the logic control unit and how it works. The fifth chapter introduces how to program to test the device under Windows platform.The last chapter introduces another task during these two years: the improvement for DDC, the key component of software radio system. This way can make the hardware realization of DDC easier and the system frequency higher; also, it provides a good way to realize the high speed DDC in software mode. The simulation experiment has been done for the improved DDC system and the results show that it has good performance.更多还原