带通滤波器设计与实现信号采样与恢复仿真信号与线性系统课程设计.docVIP

信号与线性系统 课程设计 题目： 带通滤波器的设计与实现信号的采样与恢复仿真 学号： 姓名： 学号： 姓名： 院系： 电子信息工程学院 专业： 电子科学与技术 年级： 级 日期： 年 月  摘要 带通滤波器部分 滤波器是对输入信号的频率具有选择性的一个二端口网络，它允许某些频率（通常是某个频带范围）的信号通过，而其他频率的信号受到极大的衰减或抑制。带通滤波器只允许在某一通频带范围内的信号通过，而比通频带下限频率低和比上限频率高的信号均加以抑制或衰减。本设计主要采用Multisim进行对带通滤波器幅频特性与相频特性的仿真，从而直观的反映出带通滤波器的特性。 关键词：有源带通滤波器 通频带 幅频特性 相频特性 采样与恢复部分 本设计利用MATLAB进行连续信号的采样与恢复的仿真(以正弦信号为例)，利用MATLAB产生连续时间信号，对其进行频谱分析，绘制频谱图，对该信号进行采样，绘制波形图与原信号进行对比，验证采样定理，并将采样后信号通过一低通滤波器，得出恢复出的信号，从而对信号的采样与恢复有更深的了解。 关键词：连续信号 采样与恢复 采样定理 频谱 Abstract The active band-pass filter section Filter is the input signal frequency selective a two-port network, it allows certain frequency signal (usually a certain frequency range), and other frequency signal attenuation by great or suppressed. Band-pass filter is only allowed in one a signal by frequency band range, rather than low frequency passband lower limit and upper limit of high frequency signal is to restrain or decay. This design mainly adopts Multisim to bandpass filter amplitude-frequency characteristic and phase frequency characteristics of the simulation, and intuitive reflect the characteristics of the band-pass filter. Key words: active band-pass filter passband amplitude frequency characteristics phase frequency characteristics The sampling and recovery section This design using MATLAB continuous signal sampling and restore the simulation (sine signal, for example), use MATLAB to generate continuous time signals, spectrum analysis, draw the spectrum diagram, the signal sampling, compared with the original signal waveform charting, validation sampling theorem, and the signal after sampling by low pass filter, it is concluded that restore the signal, and thus a deeper understanding of signal sampling and recovery.