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数字信号的传输方式分为基带传输和带通传输，在实际应用中，大多数信道具有带通特性而不能直接传输基带信号。为了使数字信号在带通信道中传输，必须使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。这种用数字基带信号控制载波，把数字基带信号变换为数字带通信号的过程称为数字调制。通常使用键控法来实现数字调制，比如对载波的振幅、频率和相位进行键控。(Transmission of digital signals into base band transmission and band-pass transmission, in practice, most of the channel with band-pass characteristics can not directly transmit base-band signal. In order to make the digital signal is transmitted with a communication channel, you must use the digital baseband signal to modulate the carrier to make the signal to match the characteristics of the channel. The digital baseband signal control with a carrier, the digital baseband signal conversion to digital bandpass signal is called digital modulation. Keying method is commonly used digital modulation, such as on the carrier' s amplitude, frequency and phase shift keying.)

pwe计算方形格子二维光子晶体线缺陷能带的matlab源代码(PWE calculation of two-dimensional square lattice photonic crystal line defect energy band of matlab source code)

先进pid matlab 仿真 刘金琨 第版 第一章程序 pid matlab simulink liujinkunc hap01_4.rar (Liu Jinkun advanced first pid matlab simulation program version of the first chapter pid matlab simulink liujinkunc hap01_4.rar)

基于matlab的通信系统仿真 基于matlab的通信系统仿真(Matlab communication system simulation based on Matlab communication system simulation)

实现永磁同步电机的控制，采用矢量控制的方法，效果显著(Realize the control of permanent magnet synchronous motor )

使用robert算子 寻找图像边界的方法 解决的是一道国赛的题目 找圆心给出坐标(find the edge of some part of pictures by using robert method the code solves a problem of finding the centre of circle in CUMUM )

说明：  采用开路电压法和安时积分法相结合的算法，对soc进行估计(open voltage circuit combined with columb counting method)

基于自适应滤波的DPC-MAB+SAR方位向信号重建.pdf(SAR Azimuth Signal Reconstruction Based on Adaptive Filtering for the DPC-MAB SAR System)

SAR 信号处理中常用的带频移的傅里叶变换函数，可以直接对信号进行处理(SAR fft transform with fftshift)

基于MATLAB的OFDM发送，接收端程序。(MATLAB based on the OFDM transmission, the receiving end procedures.)