54a

Negetive & Tresholding of an image

matlab仿真实现临界比例度算法功能实现(matlab simulation algorithm to achieve the critical function of the proportion of degree achievement)

Energy calculation for compression and denoising

curvelet工具箱可对图像进行曲波变换，提取图像边缘，对图像进行去噪，增强等处理。(curvelet toolbox for extracting the edge of image and enhance the noise of image.)

Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.

对噪声信号中的正弦信号，通过Pisarenko谐波分解方法、Music算法和Esprit算法进行频率估计，信号源是： 其中， ， ， ； 是高斯白噪声，方差为 。使用128个数据样本进行估计。 1、用三种算法进行频率估计，独立运行20次，记录各个方法的估计值，计算均值和方差； 2、增加噪声功率，观察和分析各种方法的性能。(Sinusoidal signal in the noise signal through the Pisarenko harmonic decomposition method, Music algorithms and Esprit frequency estimation algorithm, the signal source is: where,,, a Gaussian white noise, variance. 128 data samples used to estimate. 1, with three kinds of frequency estimation algorithm, run independently 20 times, record the estimated value of each method to calculate the mean and variance 2, the increase in noise power, observation and analysis of the performance of various methods.)

matlab经典算法程序，插值拟合，回归等(matlab classic algorithm, interpolation fitting, regression，etc。)

用于利用中国余数定理进行被除数恢复中几个函数的设计编写。(Using the Chinese remainder theorem is used for several functions dividend restoration design preparation.)

MATLAB相关书籍，希望对大家有用，相互学习，相互促进(MATLAB-related books, we hope useful, learn from each other and promote each other)

matlab作图工具介绍，还有完成的功能，学术帝需要的(introduction matlab mapping tools, as well as complete function)