DSB调制与解调

说明：  bpsk调制仿真，可直接用 1、数字调制方法 数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 数字信号的传输方式分为基带传输和带通传输。然而，实际中的大多数信道（如）无线信道具有丰富的低频分量。为了使数字信号在带通信道中传输，必须用数字基带信号对载波进行调制，以使信号与信道的特性相匹配。(1, digital modulation method Digital modulation is the transfer of the spectrum of a digital baseband signal to a high frequency to form a bandpass signal suitable for transmission in the channel. The basic digital modulation methods are amplitude keying (ASK), frequency shift keying (FSK), absolute phase shift keying (PSK), and relative (differential) phase shift keying (DPSK). At the receiving end, the digital baseband signal can be restored by using dry demodulation or non-coherent demodulation. Digital signal transmission methods are divided into baseband transmission and bandpass transmission. However, most channels in practice, such as wireless channels, have rich low frequency components. In order for a digital signal to be transmitted in a band channel, the carrier must be modulated with a digital baseband signal to match the signal to the characteristics of the channel.)

《光通信系统》的电子文档，对于学习光纤通信的人有很大的帮助。(The optical communication system, "the electronic document, for learning optical fiber has a lot of help.)

codes different spectrum sensing techniques

说明：  能够有效在MIMO通信中进行ZF和MMSE预编码(Effective precoding of ZF and MMSE)

opnet中aodv协议的模型，大家自己看好了(opnet in aodv protocol model, we own a good)

the file is implimented in C++ for wimax network it is explication of qualitie of service

基于DGTD方法的高效天线建模与仿真研究(Leap-frog discontinuous Galerkin timedomain method)

这个例子显示了如何使用的Windows RegisterDeviceNotification功能，收到WM_DEVICECHANGE消息(This example shows how to use the Windows RegisterDeviceNotification function to receive WM_DEVICECHANGE messages)

不同模态OAM的相位图，电场场强图，及用箭头表示相位变化(Phase diagrams, electric field intensity maps of different modes of OAM, and phase changes with arrows.)

说明：  对舰载 HFSWR（高频地波雷达）的阵列误差进行数学建模，通过 MATLAB 仿真来分析阵列误差对两种阵列信号处理算法的影响，并在此基础上以幅相误差为例研究了误差校正算法。(Construct the mathematical modeling of array error, and to analyze the influence of array error on the array signal processing algorithm. Based on this, the error calibration algorithm is studied by taking the amplitude and phase error as an example)