contoh_qpsk_modulation

现代通信系统（实用MATLAB)第一章程序(Modern communication systems (useful MATLAB) program the first chapter)

PGPI(NUM,DEN,W,FI,A) plots the stability boundary locus L(KP,KI,W)in the (KP,KI)-plane for an LTI system with transfer function defined by its NUM, DEN coefficients and driven by a PI controller with transfer function, C(s)=kp+(ki/s). Frequency (W) gridding becomes important. Phase Margin, FI, and Gain Margin, A, can be defined. The method works for open loop stable or unstable, minimum or nonminimum phase systems. With Examples. Method and examples used are form "Computation of Stabilizing PI and PID Controllers" by Nusret Tan, Ibrahim Kaya and Dereck P. Atherton. MATLAB release MATLAB 7.5 (R2007b)

一种声音合成的算法研究，可用Matlab方法验证(A sound synthesis algorithm used Matlab method validation)

matlab编程的短时傅里叶变换典型实例,供大家参考。(short-time Fourier transform matlab programming typical examples for your reference.)

可直接计算得到多重分形谱,本程序的性能已经达到较高水平，关于小波的matlab复合分析。( It can be directly calculated multi-fractal spectrum, The performance of the program has reached a high level, Matlab wavelet analysis on complex.)

Simple MSK modulation

改程序在噪声幅度与信号幅度相当的情况下，运用MSL算法能够实现原信号的优良输出。(Magnitude of change procedures and the amplitude of the signal in the noise equivalent circumstances, the use of the original signal MSL algorithm can achieve good output.)

说明：  利用matlab实现彩色图像的分割。算法主要是利用聚类算法。(using Matlab color image segmentation. This algorithm is to use clustering algorithm.)

这部分包括KL变换、沃尔什-哈达玛变换、Hough变换等(This section includes the KL transform, Walsh- Hadamard transform, Hough transform, etc.)

基于MATLAB的通信系统的研究和分析，并对系统进行了建模(communication system)