(毕业论文)基带信号处理中DSP技术的应用-论文.doc

毕业设计(论文)
题目: 基带信号处理中DSP技术的应用
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2012 年 5月
基带信号处理中DSP技术的应用
摘要
基带信号处理技术是通信过程中重要技术之一,传统的基带信号处理往往基于硬件电路实现,而这种方式有系统复杂、价格高、灵活性小等缺点。如今,基于软件实现的基带信号处理,以其低价格、高灵活性、低复杂度等优点逐渐取代了硬件实现,而且软件实现的效率不比硬件实现的差。
本文主要介绍了基带信号处理的软件实现,即DSP技术在基带信号处理中的应用。介绍了基带信号处理算法基本概念,并对语音信号脉冲编码调制(PCM)展开了详细的论述。
构建了基于 TI 定点DSP芯片的PCM基带信号处理系统,该系统采用一块音频采样芯片对模拟语音进行数字化,DSP对输入的 8khz 16bit的数字语音进行PCM编码输出8bit的编码,然后通过译码还原16bit的数字语音。最后,给出了详细的硬件和软件实现,并给出了具体的仿真结果。
关键词:DSP;PCM;基带信号处理
The Application of DSP Technology in Baseband Signal Processing
Summary:
The baseband signal processing technology is one of the important technologies in munication process, and traditional baseband signal processing is often hardware-based circuit, in this plex systems, the price is high, the flexibility of a small drawback. Today, software-based baseband signal processing, with its advantages of low price, high flexibility, plexity gradually replace the hardware to achieve efficient than hardware and software implementation to achieve the difference.
This paper describes the baseband signal processing software, and DSP technology in the baseband signal processing. The baseband signal processing algorithms, the basic concept, and the voice signal pulse code modulation (PCM) launched a detailed discussion.
Build the PCM baseband signal processing systems based on TI's fixed-point DSP chip, the system uses an audio sample chip digital to analog voice DSP input 8khz 16bit digital voice PCM encoder output 8bit encoding, and decoding restore16bit digital voice. Finally, a detailed hardware and software implementations, and gives the simulation results.
Key words: DSP; PCM; Baseband Signal Processing
目录
第一章绪论 4
4
5
基带信号处理的研究现状和发展趋势 5
DSP技术研究现状和发展趋势 5
6
研究目标 6
研究内容 6
论文章节安排 7
第二章基带信号处理技术基础 7
信号数字化理论 8
奈奎斯特采样定理 8
模拟信号数字化 8
基带信号处理介绍 10
信源编码 10
信道编码 11
调制与解调 12
第三章 PCM算法基本原理 13