HW4

这是关于单纯行算法的例程，时间也比较短 (This is a simple line on the algorithm routines, and time is relatively short)

matlab的程序设计——音频信号的分析与合成、音频频谱分析仪、幅度调制(matlab program design- Audio Signal Analysis and Synthesis, audio spectrum analyzer, amplitude modulation)

说明：  最短路径的Dijkstra算法程序。Dijkstra算法是典型最短路算法，用于计算一个节点到其他所有节点的最短路径。主要特点是以起始点为中心向外层层扩展，直到扩展到终点为止。Dijkstra算法能得出最短路径的最优解，但由于它遍历计算的节点很多，所以效率低。 　　Dijkstra算法是很有代表性的最短路算法，在很多专业课程中都作为基本内容有详细的介绍，如数据结构，图论，运筹学等等。 (The Dijkstra shortest path algorithm for the procedure. Dijkstra algorithm is a typical shortest path algorithm, used to calculate a node to all other nodes of the shortest path. The main characteristics is the starting point as the center outward expansion layers, until the end date be extended to. Dijkstra shortest path algorithm can arrive at the optimal solution, but because of its calculation of the node traversal, so inefficient. Dijkstra algorithm is very representative of the shortest path algorithm, in many professional courses in the basic content as described in detail, such as data structures, graph theory, operational research and so on.)

现代通信系统使用MATLAB一书中第二章，书的作者是刘树堂(Modern communication systems using MATLAB, a book chapter, book the author is LIU Shu-tang)

本课题研制了一种宽频带的数字锁相放大器，可以完成自动增益和相位 可调整，最长积分时间为100s，适合于频率从10Hz到10kHz，幅值从100nV 到10mV的微弱正弦信号检测。测量结果表明，当采样点数N大于8192时， (This project developed a wideband digital lock-in amplifier, can be completed automatically adjustable gain and phase, the longest integration time of 100s, suitable for the frequency range from 10Hz to 10kHz, amplitude from 100nV to 10mV of weak sine signal detection. The measurement results show that, when the sampling point number N is greater than 8192 hours,)

This is a method called Metoda Fibonacci. And with this method you can find the the optimum way.

After identifying the best MNT− 1 nodes with the simplified branch metric and the accumulated branch metric at stage NT − 1, we then calculate the LLR of each coded bit utilizing the standard squared Euclidian distance metric. The log-likelihood ratio (LLR) of a posteriori probability (APP) of each coded bit conditioned on the received signal y is normally calculated using the max-log approximation.

二自由度重型汽车整车模型，用Simulik搭建的，根据余志生的第五章(DOF；Two degree of freedom model of heavy automobile)

扩展卡尔曼滤波在跟踪运动轨迹中的应用（matlab程序）(Extended Kalman filter (EKF) simulation demo)

说明：  基于PSIM软件，在buck电路设计整个过程。将每一个部分分开，单个分析，最终实现buck电路DC-DC.(PSIM-based software, the whole process in the buck circuit design. To separate each part, a single analysis, and ultimately buck circuit DC-DC.)