modulation

基于多相滤波宽带信道化数字接收机，对多相滤波器进行了深入介绍。(Digital Receivers Using Polyphase Filter )

采用多相滤波结构进行仿真实验，先三倍抽取，后八倍内插(The simulation experiment is carried out using a polyphase filter structure, which is first extracted three times and interpolated eight times later)

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。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

说明：  无源被动雷达对目标进行定位之生成雷达信号,产生信号(Passive Radar Detection using Range-Doppler Transformations generate signal)

LMS算法仿真，LMS算法是智能天线波束形成的重要算法之一，在智能天线系统中得到了广泛的应用。(LMS algorithm simulation, LMS algorithm is an important smart antenna beamforming algorithm is one of the smart antenna system has been widely used.)

5G 网络 matlab 仿真 5G网络场景模拟 仿真 matlab代码，可运行(Matlab simulation of 5G network)

Jakes提出了基于正弦波叠加法的Jakes仿真模型。Jakes仿真模型是一种确定模型，产生的信号非广义平稳且不具各态历经性，其二阶统计特性与Clarke参考模型也相差较大。(Jakes fading channel model)

一个可以用语音modem录音放音的Delphi控件源码(A modem with voice recording playback control of Delphi source code)

QPSK ALmouti 2x2 mimo figure

代数编码纠错编码的经典书籍Richard_E._Blahut(error control code and algebra code；Richard_E._Blahut)