polyfit

Matlab时频分析技术及其应用源代码，包括第三章到十五章的内容(Matlab time-frequency analysis and its application source code, including the Chapter to the contents of Chapter 15)

是梳状滤波器，简单整系数的50Hz工频梳状滤波器，吉布斯振荡非常小。(The comb filter simple integer coefficients 50Hz frequency comb filter, Gibbs oscillations very small.)

LTE下行链路发射分集仿真，仿真配置：16QAM调制、1/3码率Turbo编码、10MHz带宽、每个子帧一个PDCCH符号、单码字、8次迭代Turbo译码，每次处理1000万比特用户数据、早期终止机制、MMSE（最小均方误差）MIMO接收器，PDSCH发射端进行发射分集预编码。信道模型是LTE-MIMO信道附加AWGN信道。收发两端采用的双天线配置，天线相关性为中等。(LTE downlink transmit diversity simulation configuration: 16QAM modulation, 1/3 Turbo coding rate, 10MHz bandwidth of each sub-frame a PDCCH symbol, single code word, 8 iterations Turbo decoding, each processing 10 million bits of user data, early termination mechanisms, the MMSE (minimum mean square error) the MIMO receivers, a PDSCH transmitting terminal transmit diversity precoding. Channel model is LTE-MIMO channel additional AWGN. Dual antenna transceivers at both ends of the configuration, the antenna correlation is moderate.)

说明：  利用matlab工具箱函数，分别画出长度为15的矩形窗、汉宁窗、汉明窗和布莱克曼窗的幅频（dB）特性曲线，观察它们的主要参数（主瓣宽度、过渡带宽度、旁瓣峰值幅度）的差别。(Matlab toolbox function is used to draw the amplit-frequency (dB) characteristic curves of rectangular window, hanning window, hamming window and blackman window with the length of 15, and observe the difference of their main parameters (main lobe width, transition band width, side lobe peak amplitude).)

改程序可用于模拟凝固，再结晶，塑性变形微观组织演化(cellular compute_wait)

用于通讯仿真的viterbi算法完整实现方案.用途广泛.(communications for the Viterbi algorithm simulation complete realization of the program. A wide range of uses.)

Optimization Techniques code

将MATLAB中绘制的二维曲面导出为stp格式，以在机械软件中打开进行操作(export a surface plotted in matlab and create a stp file, so that the surface can be opened in solidworks, proE, etc)

单服务台排队理论，到达时间间隔和服务时间都服从指数分布(mm1)

该程序实现FIR滤波器，是数字信号处理的重要内容。(FIR filter, digital signal processing is an important element.)