asim

本书介绍了如何用matlab来做通信系统的仿真，对于理解和加强通信系统的构造有较强的指导意义！(This book describes how to simulate a communication system using matlab.)

基于Hilbert-Huang变换的语音信号共振峰频率估计，一种对语音信号的分析方法(Based on the Hilbert Huang transform of speech signal formant frequency estimation, a method on the analysis of the speech signal)

说明：  不同SNR时，AWGN信道下能量检测ROC曲线，横轴为Pf，纵轴为Pd.SNR分别是-5dB、-10dB、-15dB(ROC curve of energy detection)

谱减法是一种比较简单的语音降噪的方法，在语音信号具有较高的信噪比的情况下具有良好的降噪功能。 (Spectral subtraction is a relatively simple pronunciation methods of noise in speech signal with high signal-to-noise ratio (SNR) of cases with good noise function.)

说明：  OFDM时频ML信道估计算法 (OFDM time-frequency channel estimation algorithm for ML )

利用k-means的算法实现图像区域分割，主程序只能运行灰度图像，彩色图像需另写调用程序(Using the k-means algorithm for image segmentation, the main program will only run grayscale image, color image subject to write the calling program)

Some common algorithms

dsb通信系统调制程序调制载波的波形和频谱分析(dsb demolution)

经典的Music算法，研究空域算法不可或缺的代码，望多多下载(Classic music algrithm, an indispensable tool in the spatial field)

该程序实现二维的FFT变换，可以对图像做FFT变换，运行速度还可以。(procedures to achieve the two-dimensional FFT transform, the image can be done FFT, can also speed.)