chengjichaxun

这是fskd频率调制的matlab代码程序，可以验证调制的效果。(fskd)

mnist原图尺寸读取， 灰度图尺寸为28*28(mnist original scale image reading with scale of 28*28)

ccf for rayleigh channel

无香粒子滤波的一个matlab例程，其中有ekf,ukf,pf,upf(In these demos, we demonstrate the use of the extended Kalman filter (EKF), unscented Kalman filter (UKF), standard particle filter (a.k.a. condensation, survival of the fittest, bootstrap filter, SIR, sequential Monte Carlo, etc.), particle filter with MCMC steps, particle filter with EKF proposal and unscented particle filter (particle filter with UKF proposal) on a simple state estimation problem and on a financial time series forecasting problem. The algorithms are coded in a way that makes it trivial to apply them to other problems. Several generic routines for resampling are provided. The derivation and details are presented in: Rudolph van der Merwe, Arnaud Doucet, Nando de Freitas and Eric Wan. The Unscented Particle Filter. Technical report CUED/F-INFENG/TR 380, Cambridge University Department of Engineering, May 2000. After downloading the file, type "tar-xf upf_demos.tar" to uncompress it. This creates the directory webalgorithm containing the required m files. Go to this di)

We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.

小波灰度矩向量计算代码，首先进行morlet连续小波变换，然后将小波灰度矩分为16份(Wavelet gray moment vector calculation code, the first to morlet continuous wavelet transform, and then divided into 16 wavelet Gray Moment)

一种基于数据融合的地球物理数据联合反演方法——以VES和MT为例(Data Fusion Based on geophysical data inversion method- in order to VES and MT as an example)

三重BOOST升压电路仿真，电压电流纹波小，效果较好(Three BOOST boost circuit simulation, voltage and current ripple is small, the effect is better.)

对于加载的接收天线的频率宽度进行优化设计(Optimal Design of Broadband Loaded Receiving Antenna)

基于MUSIC算法的空间方位估计的程序，最为正宗的MATLAB方位估计程序！(Estimation procedure based on the spatial orientation of the MUSIC algorithm, the most authentic MATLAB orientation estimation procedures.)