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DFT
信号与系统试验报告
离散傅立叶变换（DFT）和频谱分析
一、实验内容
1、实验题目
（1）编写DFT、IDFT程序，并验证其正确性（提示：可利用冲激函数进行验证）。
（2）计算信号f(t)=e-at2sin(2∏ft)的离散傅立叶变换（DFT），求其振幅谱，相位谱、振幅最大值对应的频谱（检测主频）以及对发f(t)进行DFT变换的结果实现IDFT变换，并画出图形。
参数选择如下：频率f =30HZ，a=f 2㏑(M),M=2.5
2、通过实验理解信号振幅谱、相位谱的物理意义，掌握DFT、IDFT算法的实现方法。()
- 2008-05-07 10:38:59下载
- 积分：1
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PBP
用 LDPC 解码法，对原始信号通道的噪声进行评估，消去。具体原理可参照IEEE TCOM的论文。(Channel Noise Estimation or correlation estimation for distributed source coding Using Particle based Belief Propagation for LDPC decoding in AWGN and BSC models.
This code is partially based on our published journal papers with some additional improvements. In this code, we removed the parameter lambda to reduce the number of free parameters. PBP estimator is distributed in the hope that is will be useful, but without any warranty. The codes have not been optimized, so the estimation speed may be slow. To use PBP estimator source code in your research, please cite our journal papers published in IEEE TCOM.
)
- 2013-01-07 20:10:03下载
- 积分：1
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gwj
夫琅和费衍射的matlab仿真，对此方面做了比较详尽阐述(Fraunhofer diffraction of matlab simulation, which has done more elaborate)
- 2010-05-17 07:50:52下载
- 积分：1
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malet
采用harr对激光强度图像分解与重构
可选择不同的分解方法，分解层数(failed to translate)
- 2013-05-06 18:35:07下载
- 积分：1
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fuzzy
常规模糊控制程序，有MATLAB编程和注解，可用于学习
(The example of fuzzy control)
- 2013-12-30 17:15:39下载
- 积分：1
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OFDM_MATLABmfile
该程序是实现OFDM在频带上的运用，挺好用的(The program is to achieve the use of OFDM in the band, very good use)
- 2010-11-23 12:03:36下载
- 积分：1
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fftfenxi
本文通过matlab分析信号在不同采样频率和变换点数的FFT下的频谱图，研究采样频率和变换点数对信号FFT的影响。同时还讨论了信号在不同频带噪声背景下的采样频率和变换点数的选择。(In this paper, matlab sampling frequency of the signal at different points in the FFT and transform under the frequency spectrum, change the sampling frequency and FFT of the signal points. Also discussed the noise signal in the context of different frequency bands and transform points sampling frequency selection.)
- 2011-04-28 22:30:28下载
- 积分：1
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para
船舶参数横摇,参数横摇的3自由度模型，包括垂荡和纵摇作用(Parametric Rolling of ships, the 3 degree of freedom model of parametric rolling, including heave and pitch function
)
- 2020-09-02 16:38:08下载
- 积分：1
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PCA2
Princilpe Component Analysis n
- 2015-04-09 22:02:01下载
- 积分：1
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detector
简单的matlab代码，用于实现窄带正弦干扰中的信号检测。(Detection for narrowband sinusoidal interference signal )
- 2016-01-07 14:50:20下载
- 积分：1
