Description: 1．了解数字信号处理系统的一般构成；
2．掌握奈奎斯特抽样定理。
为方便实现，实验中更换了一种表现形式，即抽样频率固定（10KHz），通过改变输入模拟信号的频率来展示低通抽样定理。我们可以通过研究抽样频率和模拟信号最高频率分量的频率之间的关系，来验证低通抽样定理。-1. Understanding digital signal processing system of the general composition; 2. Master Nyquist Sampling Theorem. To facilitate the realization of the experiment to replace a form of expression, that is, fixed sampling frequency (10KHz). By changing the input signal frequency to demonstrate low-pass sampling theorem. We can, through research and sampling frequency of the highest frequency analog signal frequency components of the relationship between to verify low-pass sampling theorem. Platform: |
Size: 3072 |
Author:深蓝 |
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Description: DFT进行频谱分析时的三种现象
1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。
采样前加低通滤波器防混叠
2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。
改用其他窗函数（非矩形）改善泄漏。
3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。-DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost. Platform: |
Size: 148480 |
Author:qinyang |
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Description: 用matlab实现个序列的傅立叶变换 而且还有实现抽样定理-Using matlab to achieve a sequence of Fourier transform but also realize sampling theorem Platform: |
Size: 1024 |
Author:xianxu |
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Description: 显示采样率的GUI源码，包括理想采样，零阶保持采样，和其他一些方式。对于学习和理解采样定理很有帮助-Show the sampling rate of the GUI source code, including the ideal sampling, zero-order to keep sampling, and some other way. For learning and understanding of the sampling theorem helpful Platform: |
Size: 12288 |
Author:joy |
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Description: 演示采样定理，时域采样，频谱周期延拓同时演示采样频率小于2*fc时，产生的混叠效应。可作函数应用-Demonstration sampling theorem, time-domain sampling, the spectrum at the same time cycle extension demonstration sampling frequency is less than 2* fc, the resulting aliasing effect. Function can be used for applications Platform: |
Size: 2048 |
Author:eachgear |
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Description: 改变原始wav音频信号的抽样频率，并且显示处理前后声音信号的频谱.有助于帮助大家理解奈圭斯特抽样定理。-Change the original wav audio signal sampling frequency, and shows the spectrum of sound signal before and after treatment. Helps to help you understand the Nyquist sampling theorem. Platform: |
Size: 143360 |
Author:leo |
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Description: matlab实现信号与系统中的抽样定理
什么是信号抽样
为什么进行抽样
抽样定理的理论推导
抽样定理内容
抽样定理的应用
-Matlab signal and system of the sampling theorem Platform: |
Size: 1847296 |
Author: |
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Description: 基于systemview的抽样定理验证，北京邮电大学信息工程 通原软件实验-Based on the sampling theorem systemview verification of Information Engineering Beijing University of Posts and Telecommunications through the original software test Platform: |
Size: 149504 |
Author:caichengming |
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Description: 数字信号处理中的时域抽样定理，作为初学者自己编写的，绝对正确，有详细的推导-Digital signal processing in the time domain sampling theorem, as a beginner I have written, absolutely right, there is a detailed derivation Platform: |
Size: 68608 |
Author:金大地 |
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Description: 数字信号处理中的频域抽样定理，自己根据DSP教材进行编写，调试过后是正确的-Digital signal processing in the frequency domain sampling theorem, prepared in accordance with DSP textbooks themselves, after debugging is correct Platform: |
Size: 123904 |
Author:金大地 |
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Description: Lowpass Sampling Theorem Plotting Function in matlab to show graphic lowpa-Lowpass Sampling Theorem Plotting Function in matlab to show graphic lowpass Platform: |
Size: 2048 |
Author:Run |
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Description: 用matlab实现数字通信系统的带通抽样定理。并实现仿真。-Using the matlab to realize the banding sampling theorem of digital communication system. And to achieve simulation. Platform: |
Size: 1024 |
Author:刘培宾 |
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Search - sampling theorem