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Description: OFDM中的关于快速傅立叶变换的个人设计的MATLAB的算法，比较经典的 ！-OFDM on the Fast Fourier Transform personal design MATLAB algorithm, more classic!
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Size: 20480 |
Author: yeyue |
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Description: AOFDM系统matlab仿真程序，包括映射、fft/ifft，加去循环前缀，信道估计等关键模块-AOFDM system Matlab simulation program, including mapping, fft/ifft. to increase cyclic prefix, channel estimation and other key modules
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Size: 5120 |
Author: zj |
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Description: matlab实现fft,以及ifft算法,包含蝶型运算等文件-Matlab achieve fft and ifft algorithm, includes a butterfly computation, and other documents
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Size: 2048 |
Author: xt |
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Description: OFDM仿真
参数：
％ 子载波数 128
％ 位数/ 符号 2
％ 符号数/ 载波 1000
％ 训练符号数 0
％ 循环前缀长度 8 (1/16)*T
％ 调制方式 4-QAM
％ 多径信道数 3
％ IFFT Size 128
％ 信道最大时延 2
-OFDM simulation parameters : % subcarriers median number of 128%/2% Symbol Symbol/Carrier Training 1000% 0% Symbol few cyclic prefix length 8 (1/16)* T% modulation 4-QAM% multi-path channel number 3% 128% Size IFFT letter Maximum delay 2
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Size: 19456 |
Author: 高源 |
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Description: 仿真参数:800个载波，1024点IFFT，载波间频1，无多径和有延迟个码片仿真。调制方式是BPSK和QPSK-simulation parameters : 800 Carrier, the 1024-point IFFT, a carrier frequency between, No multi-path and the delay-chip simulation. BPSK modulation is QPSK
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Size: 8192 |
Author: ssssss |
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Description: some kinds of frequency interpolations.which are used to processing frequency and IFFT to image spce to new image
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Size: 1024 |
Author: xiaozhi |
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Description: 加深对图像变换的理解。计算图像的傅立叶变换J，进行频谱搬移并显示；计算J的逆变换IFFT，并显示。-Deepen the understanding of the image transform. Fourier transform calculation of image J, the spectrum to move and display calculated J inverse transform IFFT, and displayed.
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Size: 28672 |
Author: Ashtray |
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Description: DVB-T 2K signal generation Eq. (2.1.4) vs. 2N-IFFT. Just compare them.
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Size: 1024 |
Author: |
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Description: 用matlab产生不同的波型，对其进行FFT 功率谱，对数谱然后用IFFT进行反变换-Using matlab produce different wave type, its FFT power spectrum, the spectrum and then use the IFFT to inverse transform
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Size: 1024 |
Author: 方杰平 |
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Description: 这是一个IFFT数字信号处理程序的MATLAB仿真代码，希望可以为新手提供参考-This is a digital signal processing IFFT procedure MATLAB simulation code, hope that we can provide a reference for the novice
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Size: 1024 |
Author: |
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Description: ofdm 仿真的程序，包括参数定义，fft，ifft，调制解调等源码，很好用啊！-OFDM simulation procedures, including the definition of parameters, fft, ifft, modulation and demodulation, such as source code, with very good ah!
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Size: 4096 |
Author: zhangweijin |
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Description: 这里有fft,ifft,conj,xcorr,resample的用法。-Here are fft, ifft, conj, xcorr, resample usage.
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Size: 2048 |
Author: Ma xianzhe |
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Description: OFDM的发射端，包括pi/4DQPSK的调制，ifft，加帧头以及组帧-The OFDM transmitter, including pi/4DQPSK modulation, ifft, plus header and Framing
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Size: 1024 |
Author: xiaoxiao |
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Description: 选取windows系统自带的ding.wav信号作为分析对象，在Matlab软件平台下，利用函数wavread对音频信号进行采样，记住采样频率和采样点数，听一下原始声音sound(y, fs, bits)。
（2）音频信号的频谱分析，先画出音频信号的时域波形；然后对音频号进行快速傅里叶变换fft(y,N)，N取32768，画出信号的频谱特性，加深对频谱特性的理解。
（3）根据频谱，反演时域特性，画出时域波形。寻找幅值最大的两个频率，此频率除以fft点数在乘以采样频率就是信号的主频，即可合成信号的时域图形，听一下声音。
（4）对原音频信号进行1024点的分段付立业分析meshgrid
（5）根据主要频线合成音频，并画出时域图形，试听合成效果。
（6）采用线性插值（linspace）和傅立业反变换(fliplr, ifft)分别合成音频，并画出时域图形，试听效果。
-err
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Size: 1024 |
Author: 何亮 |
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Description: 摘要:为了提高图像复原算法的性能 ,提出了一种改进的奇异值分解法估计图像的点扩散函数。从图像的退化离散模型
出发 ,对图像进行逐层分块奇异值分解 ,并自动选取奇异值重组阶数以减少噪声对估计的影响。利用理想图像奇异值向
量平均能谱指数模型 ,估计点扩散函数奇异值向量的频谱 ,再反傅里叶变换得到其时域结果。实验结果表明 ,该方法能
在不同信噪比情况下估计成像系统的点扩散函数 ,估计结果比原有估计方法有所提高 ,有望为图像复原算法的预处理提
供一种有效的手段。-Abstract : To improve the performance of image restoration algorithms , a modified Singular Value De2
[ ] [ ]
composition SVD method was proposed to estimate the Point Spread Function PSF of an imaging
system. Using the discrete image degradation model , a block2based SVD filter scheme was applied for
the image denoising with an automatically determined singular value rank. After the spectra of PSF
singular vectors were estimated under an exponential model for the averaged spectra of un2degraded
image singular vectors , the IFFT was used to get the time2domain estimation of the PSF. The experi2
mental results show that this proposed method can be applied to estimate the PSF of the imaging sys2
tem under a wide SNR range and its performance is better than the original method. It may be used as
an effective method for the image preprocessing in image restoration problems.
[ ]
Key words: image restoration Point Spread Function PSF block2based Singular Value Decomposi2
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Size: 476160 |
Author: zy |
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Description: DVB-T发射机MTLAB程序 主要描述了DVB-T 2K 模式的发射机 包括信号产生模块 IFFT调制模块 和CP加入模块等.-DVB-T transmitter mainly describes the DVB-T 2K mode transmitter including modulation signal generator module IFFT module and add modules, such as CP.
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Size: 1024 |
Author: 刘申 |
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Description: 还在为“基于MATLAB的OFDM系统仿真”的朋友，可以看看我总结的资料！
该代码通过综合了本站中的两个源代码，在MATLAB 7.0下完成OFDM系统的完美仿真：音频数据采集->S/P转换->16QAM映射->IFFT处理->添加CP->P/S->理想/多径信道传送->……（FFT等）->传输结果比较（前后频谱图、可以直接通过听前后的音频文件来辨别系统的好坏-理想信道时音质前后相同）。在此还要感谢那两位站员提供相关的代码，也希望能对其他人有帮助。更希望本站能吸引更多的编程爱好者再创佳绩。-KEYWORD:OFDM MATLAB 7.0 CP IFFT FFT P/S S/P
Also for the " Based on MATLAB simulation of the OFDM system," a friend, you can see my summary of the information! The code through a combination of the two site source code, MATLAB 7.0 at complete perfection OFDM system simulation: Audio Data Acquisition-> S/P conversion-> 16QAM mapping-> IFFT processing-> Add CP-> P/S-> ideal/multi-path channel transmission-> ... ... (FFT, etc.)-> transmission results (before and after the frequency spectrum can be directly before and after listening to audio files to identify the system good or bad- when the ideal channel before and after the same sound quality). This would also like to thank at the two stations to provide the relevant code, also hope to have helped others. I also hope to attract more site programming enthusiasts new heights.
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Size: 8192 |
Author: sunshinepwf |
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Description: 用于信号处理的matlab小程序。傅里叶变换和傅里叶逆变换-fft or ifft
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Size: 1024 |
Author: cs |
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Description: ofdm ifft/fft仿真，在真实环境下的信号流程-ofdm
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Size: 2048 |
Author: zhang |
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Description: A Matlab IFFT implementation using matlab itself
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Size: 1024 |
Author: abdullahkhateeb |
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