chapter04

产生QPSK的简单程序，先产生0到3的随即数字，用这些数字产生相位，然后产生QPSK信号！(Get QPSK！)

说明：  使用MatlaB编程，计算三维流体的粘阻，同时生成横截面的速度矢量图像(Use MatlaB programming, calculating three-dimensional viscous fluid resistance, and generate cross-sectional velocity vector images)

用Pisarenko算法实现功率谱估计，可明显区分四个信号的峰值。(Pisarenko algorithm using power spectrum estimation, can significantly distinguish between the four signal peaks.)

利用mathlab仿真雷达脉冲压缩测距原理。对两个雷达回波信号进行脉冲压缩实现可分辨。(Using mathlab simulation principle of pulse compression radar ranging. The two implementing pulse compression radar echo signals can distinguish. )

说明：  基于RlS（递归式最小均方）自适应滤波算法的C程序的仿真代码(Adaptive filtering algorithm based RlS C program simulation code)

说明：  物元分析法由我国数学家蔡文在 20 世纪 80 年代提出． 应用物元法建立多指标评价模型，可以针对复杂问题建立形象化模型，定量化得出评价结果，从而较完整、准确地反映事物的综合水平。利用matlab编程，进行如下步骤计算：1、待判物元的确定；2、经典域、节域的确定；3、关联函数；4、综合关联度(Matter-element analysis method was put forward by Chinese mathematician Cai Wen in 1980's. Applying matter-element method to establish multi-index evaluation model can establish visualization model for complex problems and quantify the evaluation results, so as to reflect the comprehensive level of things more completely and accurately. Using MATLAB programming, the following steps are calculated: 1. determination of the subject element to be judged; 2. determination of classical domain and node domain; 3. correlation function; 4. comprehensive correlation degree)

基于yule_walker方程的空间谱估计算法，对学习空间谱估计与天线阵列的朋友会有帮助：）(yule_walker equation based on the spatial spectrum estimation algorithm right learning space spectrum estimation antenna array and friends will be helpful :))

matlab中矩阵运算。文档内容含有各种矩阵运算，是我等码农辛苦整来的(matrix operation)

应用四步相移法实现包裹相位的解缠，另有解缠结果(Application of four step phase shifting method to achieve the wrapped phase unwrapping, otherwise the unwrapping results)

TM 波 的 入 射(the input of TM wave)