jzt+qq

PS2通信，用stm32单片机模拟键盘鼠标往电脑送数据。(PS2 communication with stm32 SCM simulation to send data to a computer keyboard and mouse.)

在stc51单片机上实现对多路ADC、串口的控制例程(Stc51 MCU in the realization of multi-channel ADC, serial control routines)

线性反投影算法（Linear Back Projection，简称 LBP）又称累加法，是最早使用的一种简单（ECT图像重建）成像算法。它将通过某点的所有投影射线进行累加，再反向估算出该点的密度值。从成像观点分析，它是不完全的雷登逆变换（完整的雷登逆变换包括微分、希尔伯特变换、反投影和归一化等步骤）。(Linear back projection algorithm (Linear Back Projection, referred LBP), also known as cumulative method, is the first to use a simple (ECT image reconstruction) imaging algorithms. It accumulates all projection rays through a point, then reverse the estimated density value of the point. From the image point of view analysis, it is not exactly the inverse transform Leiden (Leyden complete inverse transformation involving differential Hilbert transform backprojection and normalization steps, etc.).)

Randon data from program

本代码实现的是将菜单显示对话框然后在对话框中实现一定功能。(This code is the realization of the menu display dialog box and then in the dialog box to realize a certain function )

说明：  本PDF文件为市电电压频率测量计的设计说明书！从中能了解相关的电路设计(The PDF file is mains voltage frequency meter design manual! From which to understand the relevant circuit design)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

选择一种编码方式。在这里可以采用行编码和列编码，但经过大量的实验表明，这两种编码方式的抗干扰性能不佳(choose a coding. The trip here can be used coding and coding out, but after a lot of experiments showed that both the encoding anti-jamming performance poor)

Threshold Adaptive Threshold

外国牛人写的kaze特征点检测的算法，作者本人认为好于SIFI和SUFT。并在代码中比较了他们的实际效果(Foreign cattle people write kaze feature point detection algorithm, the author think SIFI and SUFT.And compares their actual effect in the code)