qpsk

some of the important matlab codes for calculating PSD of a signal for students

水声信道中基于LMS算法的自适应均衡,里面有调制、解调、自适应均衡等模块。(adaptive equalizer in Underwater Acoustic Channel based on LMS)

matlab codes for Implements 1D-3D NUFFTs via Fast Gaussian Gridding

说明：  Matlab在图像处理方面的代码 染色体识别与统计(Matlab code in image processing and statistical identification of chromosome)

for removal used to remove the fog and get clear image

Gaussian noise refers to its obey gaussian probability density function (i.e., normal distribution) of the noise. If a noise, its amplitude distribution obeys the gaussian distribution, and its power spectral density is uniformly distributed, has described it as a gaussian white noise. Were not associated with the second order moments of the gaussian white noise, a moment is constant, 所谓高斯噪声是指它的概率密度函数服从高斯分布（即正态分布）的一类噪声。如果一个噪声，它的幅度分布服从高斯分布，而它的功率谱密度又是均匀分布的，则称它为高斯白噪声。高斯白噪声的二阶矩不相关，一阶矩为常数，是指先后信号在时间上的相关性。高斯白噪声包括热噪声和散粒噪声。 (Gaussian noise refers to its obey gaussian probability density function (i.e., normal distribution) of the noise. If a noise, its amplitude distribution obeys the gaussian distribution, and its power spectral density is uniformly distributed, has described it as a gaussian white noise. Were not associated with the second order moments of the gaussian white noise, a moment is constant, refers to the correlation of signal in time. White gaussian noise including thermal noise and shot noise. )

FULL EXPLICIT SCHEME ONE DIMENSION HEAT EQUATION

通过小波分解的手段对时间序列信号进行降噪。内有英文说明书。 (The noise reduction of time series signals by means of wavelet decomposition . There are instructions in English.)

在matlab下实现多径信道仿真，计算误比特率(Matlab achieved in multi-path channel emulation, bit error rate calculation)

说明：  处理波形，计算声波再通过障碍物以后的延迟,从而计算声波在不同介质中的传播速度(Treatment of waveform, calculated the time delay after the sound waves pass through the obstaclesand，In order to estimate the acoustic propagation velocity in different media)