QAM_coding

this code tells how to do denoising an image

说明：  zigbee三边测量法，简单实用，适合初学者(zigbee trilateration, simple and practical, suitable for beginners)

FSK调制解调MATLAB源代码,包含经过信道的实际信号,相干解调后的信号的眼图，非相干解调后的信号的眼图等内容。(FSK modulation and demodulation MATLAB source code, contains the actual signal after channel coherent demodulation signal eye diagram, non-coherent demodulation signal eye diagram.)

说明：  Aitken迭代程序,类似于简单迭代法,但由于简单迭代法.(Aitken Iterative procedure, similar to the simple iterative method, but due to simple iterative method.)

说明：  本程序是一个基于haar小波基德脉冲响应辨识程序，针对一个二阶模型进行辨识，并与实际的系统模型进行比较(it is propsed a method that could make identification based on Haar wavelet)

Impedance Smith Chart High resolution

Application of rule d nearest neighbor to build the partition of the Vornoi

unscented kalman filter for optimization

Aiming at determining the satellite attitude precisely，the gyros bias and m isa lignment were compensated in time by using the quaternion of star-sensor and extended Kalm an filter．The related module of the filter was derived．The theoretic accuracy of the algorithm was acquired from the numerical simulation． The effects of the star-senso r misalignment on attitude determination were analyzed at last．

Low pass filter for images, to filter the image its necessary to use a Laplace transform using the fft2 command.