lfm_iq

二阶和三阶锁相环实现costas环，能够实现载波跟踪(Second and third order phase-locked loop to achieve costas, to achieve carrier tracking)

将叶轮的几何参数保存为desc格式，以便ISIGHT调用进行叶型优化。(compressor wheel,geometrical optimization,geometry parameter,desc,axcent,isight)

这个程序是用来仿真多小区多用户，已知信道信息，采用OFDM，QPSK调制下的误码性能分析，特点是将预编码参数放在频域处理。(This program is used to simulate multi-user multi-cell, known channel information, using OFDM, QPSK modulation BER performance under analysis, is characterized by the pre-coding parameters on the frequency domain.)

Tutorial for cmex in matlab builing c(cmex matlab)

DWT COde using folding coefficient.............

用matlab控制PID参数，进行调整，可实现仿真，适合初学者(Matlab PID control parameters to be adjusted, enabling simulation, suitable for beginners)

梳状导频方式下OFDM系统的LS、LMMSE算法比较(Comb Pilot OFDM system under LS, LMMSE algorithm)

说明：  单个脉冲序列生成子程序 & 用脉冲响应不变法把模拟滤波器系数变换为数字滤波器系数的函数 (single pulse sequence generated subroutine)

说明：  详细的BP神经网络实现代码，自己编程，从新手角度很好的入门资料。(BP neutral network based on matlab,)

仿真极化码在不同码长下的极化效果图，包括散点图和柱状图(polar code simulation)