毕业设计（论文）-基带信号处理中DSP技术的应用.doc

毕业设计(论文) 题目: 基带信号处理中 DSP 技术的应用学生姓名: 学号: 专业班级: 指导教师: 学院: 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 T echnology in Baseband S ignal P rocessing Summary: The baseband signal processing technology isone 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 ofa 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 restore 16bit digital voice . Finally, a detailed hardware and software implementations , and gives the simulation results . Key words : DSP; PCM ;B aseband S ignal P rocessing 目录第一章绪论...................................................................................................................................................... 4 选题背景和意义........................................................................................................................