houghtransform

高斯信道下的BPSK信号 对其进行归一化 并求出均值 方差 包络等(Under the Gaussian channel BPSK signals normalized them and obtained such as mean-variance envelope)

能量检测，根据以URKOWITZ 在1967年发表的能量检测文章以及Digham 2003、Ghasemi 2007发表的一系列文章为参考， 在AWGN信道中，给定SNR下，先产生一个原始信号（单音或者BPSK基带信号），然后叠加高斯噪声， 再进行能量检测(Energy detection, according to URKOWITZ the energy released in the 1967 test articles, and Digham 2003, Ghasemi 2007 series of articles published as a reference, in the AWGN channel, for a given SNR, the first generating an original signal (mono or BPSK baseband signal), and then superimposed Gaussian noise, then the energy detection)

Natural frequency of shell bubble compare to free bubbles

deltal调制的simulink模型，希望对大家有用(simulink module of deltal modulation，hope it can be helpful)

matlab code for AWGN channel

说明：  数字图像处理及MATLAB实现(余成波)PDF版(Digital image processing and MATLAB implementation (YU Cheng-bo) PDF version)

matlab code used for the speech processing

数字信号处理，滤波器的设计，使用Kaiser窗(Digital signal processing, filter design, the use of Kaiser window)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

matlab程序，用来计算非线性光学晶体双轴晶的相位匹配角(for calculation of biaxial crystal phase-matching angles)