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用Welch法进行功率谱估计
- 考虑L的三个不同值：L＝256（3个数据段），L＝128(7个数据段)和L=64（15个数据段）。各自的谱估计图如上图所示。可以明显的看到，加窗明显的减小了频谱上的假谱峰，但也更加进一步平滑了谱峰。所以，对于L＝64的情况，在ω＝0.8π的谱线可以很确定的辨认，但是那两个靠近的谱峰不容易区分。对于L＝128的情况，这种情况提供了在分离和检测间最好的均衡。当然，对于在L＝256时的情况，效果是更好的，能够从谱估计图上明显的分辨出三条谱线的存在以及它们幅度关系的强弱。 除了Welch法外，还可以采用
VC_MATLAB
- VC跟Matlab混合编程 VC与Matlab案例1.256色转灰度图2.对比度拉伸3.二值化变换4.反色5.灰度均衡6.亮度增减7.取对数8.取指数9.图像镜像10.图像平移11.阈值变换12.直方图均衡VC程序
ofdm
- 用matlab 实现ofdm,输入的是长度为256的随机序列，其中用到了opsk调制，ifft和fft变换
SpaceTimeTrellisCode
- 使用MATLAB 和C MEX编写的在4, 8, 16, 32, 64, 128, 或 256多状态下QBSK调制空时格码仿真源程序。
melcepst.rar
- 计算Mel倒谱系数的matlab程序： MELCEPST Calculate the mel cepstrum of a signal C=(S,FS,W,NC,P,N,INC,FL,FH) 使用: c=melcepst(s,fs) ％ calculate mel cepstrum with 12 coefs, 256 sample frames,Mel cepstrum coefficients calculated the matlab procedure: MELCEPST Calcu
aaa
- 本次的算法是相位周期展开聚类，读取256个点 根据拉格朗日插值分数维延时的信号，然后在频率点上展开读取，根据2pi延长相位计算时延！-The cycle phase of the algorithm is to start clustering, read the 256-point Lagrange interpolation based on fractal dimension of the signal delay, and then started to read the frequen
lesson_3
- 梯形与simpson求积公式 分别是梯形,simpson,和3/8simpson的matlab代码,计算的区间被划分成为了又2到256个,精度逐渐增加.-Trapezoidal and simpson quadrature formula are trapezoidal, simpson, and 3/8simpson of matlab code to calculate the interval was divided to become another 2-256, a gradual
filter-deniose
- matlab下实现降噪，功率谱计算。％程序中设定采样点数为256个，采样频率为10000hz， ％输入信号为随机噪声和两个正弦的合成信号 ％设定的滤波器的截止频率为3500hz ％通过挈比雪肤滤波器，运行程序，比较滤波前后的频域波形 ％滤波去除了高频信号-matlab achieve noise reduction, power spectrum calculation. Sampling procedure set for 256 points, the sampling f
SpaceTimeTrellisCode
- The software is capable to simulate space time code [1] for QPSK modulation using different number of state. Examples of generator matrix up to 256 stetes are provided. Variable signal to noise ratio (SNR) might be applied to produce bit error rate (
QPSKandQAM256
- 256QAM和QPSK调制的MATLAB仿真-QPSK modulation 256QAM and simulation of MATLAB ............
improved_jakes
- This code implies the improved Jakes Method( Y. R. Zheng and C. Xiao, Improved models for the generation of multiple uncorrelated Rayleigh fading waveforms, IEEE Comm. Lett., vol. 6, no. 6, pp. 256-258 (2002) ) to simulate Rayleigh fading -This c
ecg1
- ecg filter, svd, filter 128 hz and 256 hz
dct
- extract file and the working is to get dct matrix of 256*256 image which is divide into each 8*8 image block
shen_lsb_1
- LSB算法，将二值（0，1）图像嵌入到指定图像（256*256）中，从第一位到第八位。-LSB algorithm, the two values (0,1) image is embedded to the specified image (256* 256), from first to eighth.
256
- //位图文件读取函数：打开、构造与缓冲含有手写字 //符的位图文件。-//Read bitmap file functions: open, constructed with the buffer containing handwritten characters// break the bitmap file.
slmpapr251
- slm method for papr ofdm.10000,working.for d=2,3,N=512 256 1024.slm method for papr ofdm.10000,working.
zhos
- 用Matlab实现中值滤波与Otsu算法 包括彩色图转256灰度，灰度图中值滤波处理，再用Otsu算法处理。-Median filter implementation using Matlab and Otsu algorithms including 256-color map turn gray, grayscale median filter, and then Otsu algorithm processing.
DCT
- 读入一幅256*256图像，将它分成8*8pixel的若干块，对每块做DCT变换，保留Z型顺序的若干变换系数，进行IDCT重构图像，计算重构图像的信噪比-Reading a 256* 256 image, it will be divided into several blocks of 8*8 pixel, keep each optimal Z transformation of sequence number, IDCT transform coefficient calculation
BasicZoomShrink
- Hi This very simple zoom and shrink image program for 256 x 256 size image-Hi This is very simple zoom and shrink image program for 256 x 256 size image
OFDM_send_matlab
- matlab发送端程序,256位FFT,16QAM-OFDM，最后有时域和频域图形显示-matlab sender program, 256 FFT, 16QAM-OFDM, the last times and frequency domain graphics