attitude-determinati-

说明：  包络分析，用于信号处理。本例举出了一个范例，可以供大家学习参考。(Envelope analysis for signal processing. This example gives an example for everyone to learn from.)

这是GPS捕获程序的基本代码 很容易理解 不错(This is the basic code of the GPS capture program is very easy to understand good)

异步电机空间矢量控制，使用了磁链观测器，虽然是开环观测 但是性能依然良好(Space vector control induction motor, using a flux observer, though, is the open-loop observer but the performance is still good)

仿真了高斯白噪声，并通过巴特沃夫滤波器生成高斯色噪声(The gaussian noise was simulated and the gaussian noise was generated through the butterworth filter)

自编的联合对角化程序，简单，清晰，并有痃详细的注解，带有两个波形文件，可直接显示结果。(jointly staged by the diagonalization procedure, a simple, clear and detailed explanation feast, with two waveform documents, The results can be shown directly.)

说明：  radon_transforms拉东变换与反变换(radon_transforms and inver transform)

主要研究无线通信系统中，调制信号的载波同步问题，利用锁相环技术实现同步的matlab仿真(This paper mainly studies the carrier synchronization of modulated signal in wireless communication system, and realizes the MATLAB simulation of synchronization by using phase-locked loop technology.)

GPS 单点定位，高度角随机模型加权，电离层K8模型改正。(GPS single point positioning, elevation weighted random model, ionosphere corrections K8 model.)

五种飞行轨迹，轨迹中包含各种飞行姿态，适合初学者。(Five Kinds of Flight Trajectories)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 (On the wireless channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.)