【摘 要】 随着集成电路技术的飞速发展以及SOC技术的出现，基于SOC的数字通信技术也得到了快速发展，基于IP核的SOC技术被越来越多的人所接受并应用到数字通信技术的各个领域。本文从SOC技术的基本概念和SOC的设计流程出发，介绍了SOC设计的关键技术，讨论了SOC在工艺实现和性能测试等方面的技术挑战。同时展望了SOC技术的发展趋势。本文研究了中频数字信号处理有关的关键技术，如采样技术，多抽样率理论和多级滤波器抽取技术，比较了几种专用的单通道和多通道DDC芯片，并提出了基于FPGA的DDC的实现方案，设计和... 更多 >> 随着集成电路技术的飞速发展以及SOC技术的出现，基于SOC的数字通信技术也得到了快速发展，基于IP核的SOC技术被越来越多的人所接受并应用到数字通信技术的各个领域。本文从SOC技术的基本概念和SOC的设计流程出发，介绍了SOC设计的关键技术，讨论了SOC在工艺实现和性能测试等方面的技术挑战。同时展望了SOC技术的发展趋势。本文研究了中频数字信号处理有关的关键技术，如采样技术，多抽样率理论和多级滤波器抽取技术，比较了几种专用的单通道和多通道DDC芯片，并提出了基于FPGA的DDC的实现方案，设计和实现了基于SOC的DDC IP核。移频键控是短波数字通信中常用的一种调制方式。本文研究了目前比较传统的FSK解调算法和在文献中公开发表的两个FSK解调算法，并进行了比较和总结；提出了一种新的FSK解调算法，该算法基于相位的变化,易于实现和移植，仿真结果表明，该算法具有较好的误码率性能。Along with the more complicacy of integrated circuit and the emergence of SOC system, the research on SOC based digital communications technology has been developed rapidly.More and more people begin to accept the SOC technology that based on IP core and apply the technology to the field of the digital commication. This paper presents the basic conception and design flow of SOC,the key techniques for SOC design and the challenges about design methods, manufacturing process and functional test for SOC.It also discusses the development frend of SOC technology.In this paper, based on IF (intermediate frequency) software radio, the theories and the implementation scheme of IF digital signal processing techniques are discussed. For example,the sampling technology,multirate digital signal processing and the multidecimition filter technology.In the paper,some specially DDC chips are compared.The IP core of digital down converter (DDC) based on the FPGA implementation scheme is designed and implemented. The Frequency Shift Keying modulation is widely used in HF digital communication.This thesis mainly discusses the method of FSK and demodulation. It also discuss the traditional way ofFSK demodulation and two algorithms of FSK demodulation that published in the reference ,compare and summarize the ways of FSK demodulation . But in this thesis, a digital method of accomplishing FSK demodulation was put up and realized. The FSK demodulation algorithm base on the change of the phase, it is easy to be realized and replanted. Computer simulation results show that, the algorithm gives better character of BER. << 收起
