shexing

variable step-size fourth-order Adams Predictor-Corrector method

embedded zero tree coding

实现霍夫变换的功能程序， function [rodetect,tetadetect,Accumulator] = houghtrans(imb,rostep,tetastep,thresh)(function [rodetect,tetadetect,Accumulator] = houghtrans(imb,rostep,tetastep,thresh))

在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来 在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频 然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫 而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号 如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了 因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频 常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。 (In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ But the signal demodulation out is very small, at this time would be passing filter to get what we need signal If design directly filter, order number be colossal, software, hardware equipment all suffer Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar.)

BP神经网络算法，最常用的BP网络解法，下载后既可以运行使用。(BP neural network algorithm, the most commonly used BP Neural Networks Approach to download either run using.)

说明：  图片的阴影检测，是基于RGB空间模型的很适合初学者学习使用。(Image detection, is based on the RGB space model is suitable for beginners to learn to use.)

pi/4-dqpsk 调制解调 的 matlab 仿真，通过srrc滤波器实现16倍的上采样(pi/4-dqpsk modulation and demodulation matlab simulation, through srrc filter to achieve 16 times the sampling)

在MATLAB simulink中搭建MSK调制解调模型，码元速率可以调整，可以增加信道模型也观察信噪比与误码率之间的关系，scope观察解调结果。(MSK modem built in MATLAB simulink model, the symbol rate can be adjusted to increase the channel model can also observe the relationship between SNR and BER, scope observation demodulation result.)

说明：  无线传感器网络中经典定位算法：dv-hop算法的实现(Wireless sensor network localization algorithm in the classic: dv-hop algorithm implementation)

结合cmac 的pid控制原码 可仿真实现 结果有误差曲线 跟踪曲线 参数整定曲线等(Combination of CMAC)