Exercise4

二用户CDMA系统，信道为加性高斯信道，使用BPSK调制，15位M序列扩频，可以正确解扩解调。 输出为2用户的基带信号、扩频信号、PSK调制信号、解调信号的时域和频域特性，给出两个用户分别的误码率。 (Second, the user CDMA system, channel for the additive Gaussian channel, using BPSK modulation, 15 M Sequence Spread Spectrum, you can correct demodulation despreading. Output of 2 user' s baseband signal, spread spectrum signal, PSK signal modulation, demodulation signal time domain and frequency domain characteristics of the two users are given the bit error rate, respectively.)

可以对离散点进行波面泽尼克拟合，程序很好用(Wave surface Zernike fitting can be used for discrete points)

说明：  永磁同步电机智能PID控制的原理、数学模型、矢量控制、建模仿真与结果分析。(The principle, mathematical model, vector control, modeling simulation and result analysis of intelligent PID control for PMSM.)

研究阵列信号的算法，Esprit算法的仿真程序，已经测试过了，不错(Algorithm of array signals, Esprit algorithm simulation program, has been tested, and good)

Average based noise estimation

应用牛顿法和二分法解高次方程，可以显示过程( it can solve hard questions )

基于Matlab，针对不同采样点数做的频谱分析对比(Based on Matlab, spectrum analysis and comparison of different sampling points)

2013年秋季 北京航空航天大学惯性导航第一次大作业，指北方位平台惯导系统解算(homework of inertial navigation of beihang university )

notch filter的源程序代码(notch filter to the source code.)

这个程序是用ｍａｔｌａｂ程序编写的应用数值方法计算二维平板传热的一个应用程序，含有源代码和公式，可以根据具体参加和情况进行二次开发，简单使用，非常方便。(use the Matlab to build a code,use numirical method to solve 2-D heat transfer problem, cold in the pack,can be modified by your need)