polyphase

计算船舶pitch运动阻尼 经验公式法 计算船舶pitch运动阻尼 经验公式法(calculate pitch motion and damping by empirical equations)

将一个被小波包分解的矩阵变成小波结构，根据最高的分解层次，将原图3*level+1块分开赋给矩阵以便单独操作，按从上到下，从左到右的顺序(A matrix of wavelet packet decomposition into wavelet structure, according to the highest level of decomposition, the original 3* level+1 block separately assigned to the matrix in order to operate independently from top to bottom, from left to right order)

计算一个输入脉冲在抽样频率为fc时的有效持续时间tm(calculation input pulses in a sampling frequency fc for the effective duration tm)

这是各种计算功率谱的matlab程序，有自相关法，music法，burg法，esprit法等。(This is the calculation of the power spectrum Matlab procedures, since the relevant law, music, burg, esprit law.)

使用MATLAB对数字基带信号进行仿真的缘带码.仿真后结果有高斯噪声(use MATLAB for digital baseband signal simulation code geopolitical zone. Simulation results after a Gaussian noise)

经验小波分解，通过ewt变换分解重构信号，实现对信号的降噪(Experience in wavelet decomposition, reconstruction signal by ewt transformation decomposition, realize the signal noise reduction)

说明：  搭建BPSK+编码+交织仿真通信链路，仿真分析在不同信道条件下的不同译 码算法的误比特率性能。基于matlab，搭建BPSK+卷积编码+交织通信收发链路， 仿真参数如下： 1) 信源比特速率： 100 b R kbps = 2) 卷积编码：码率为1/2，生成多项式为（561,753） 3) 译码方式：维特比译码（硬判决译码、软判决译码（8 比特量化）） 4) 交织：行列交织，交织器深度为100bit，宽度为10； 5) 仿真点数：106(BPSK+ coding + interleaved simulation communication link)

此程序为信号阶次分析，主要针对汽车上振动噪声信号(Order this program for signal analysis, the main noise and vibration signals for the car)

simulation to verify efficiency of Convolutional Coding

CRC的MATLAB实现程序以及设计论文(MATLAB implementation of the CRC program as well as design thesis)