4FSK-demodulation-and-modulation

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.)

qpsk突发调制，完美实现qpsk，使用方便，简介，完美运行(qpsk burst modulation, the perfect realization of qpsk, easy to use, Profile, perfect running)

西門子CNC系統編程代碼表,對初學者幫助很大(Siemens CNC system control code )

雷达点迹关联与点航关联的matlab程序(Matlab program of radar dot correlation and dot correlation)

Borland c++ builder串口通讯源码示例程序(Borland c builder serial communications source sample program)

一个新的通信协议，一线通协议模版软件，希望对大家开发有用(A new communication protocol, Link Agreement template software, everyone would like to develop useful)

说明：  基于马尔科夫的图像分割代码，可运行，可运行，可运行(Image segmentation code based on Markov, can run, can run, can run)

随机构造的LDPC码的编译码过程：BP1、GetG、getH、H2G、LDPC(The encoding and decoding process of random constructed LDPC Codes: BP1, GetG, getH, H2G, LDPC)

压缩感知的方法进行DOA估计。关键字：压缩感知，DOA(DOA estimation by CS)

用simulink中s函数实现两路切换开关(S function with simulink realization of two-way switch)