a2v_liedu

The sourcecode is about optical character recognision using matlab.

设计低通数字滤波器，要求在通带内频率低于 时，允许幅度误差在1dB以内，(Design of digital low pass filter, requirements in the passband frequencies below, allow a margin of error of less than 1dB,)

里面是小波分析的实现方法，还有数学介绍。数字信号处理上机实验答案(第三版).docx的电子版(There is a wavelet analysis method, as well as mathematical description. Digital signal processing on the experimental answer (third edition). Electronic version of docx)

lyapunov指数计算常用方法，包括定义法、小数据量法、正交法、wolf法，以lorenz系统为例，内有详细说明，均以通过测试(lyapunov Index commonly used methods, including the definition of law, a small amount of data, orthogonal method, wolf law to lorenz system, for example, with detailed instructions, are tested)

Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.

改进boll谱减法，语音增强效果有提高。与MMSE算法不相上下(Improved the boll spectral subtraction speech enhancement effect has been improved. Comparable with the MMSE algorithm)

LDPC码既低密度奇偶校验码（Low Density Parity Check Code，LDPC）(（Low Density Parity Check Code，LDPC）)

通过锁相环的方法实现2fsk的传输系统的设计，，这是仿真图。。仅供参考(Achieved through the PLL 2fsk designed transmission system, which is the simulation of Fig. . For reference only.)

说明：  matlab下实现的小波变换，很好用(matlab under the wavelet transform, a very good use)

％ 用途：选列主元Gauss消去法解线性方程组ax=b ％ 格式：x=nagauss2(a,b,flag) a为系数矩阵，b为右端列向量，flag若为0，则显示中间过程 ％ 否则不显示，默认值为0，x为解向量 ( Usage: Selected Principal Gauss elimination method solution of linear equations ax = b format: x = nagauss2 (a, b, flag) a for the coefficient matrix, b for the right side column vector, flag if it is 0, it shows the middle Otherwise, the process does not appear, the default value is 0, x for the solution vectors)