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扩频通信，从电磁波利用来看，与一般现有的常规通信方式完全不同。扩频通信利用伪随机编码把信息数据（窄带信号）的频谱进行扩展，形成宽带的低功率谱密度信号发射，使用不同的伪随机序列编码，不同通信用户可在同一频段、同一时间工作，互不影响或干扰极小地进行通信。(Spectrum, from the electromagnetic waves used term, and the general existing conventional means of communication is entirely different. Spread spectrum communication using pseudo-random code to the information data (narrowband signal) to extend the spectrum, the formation of low-power spectral density broadband signal transmission, using different pseudo-random sequence of coding, different communication users at the same frequency band, at the same time work, mutual does not affect or interfere with a very small way to communicate.)

脉冲反褶积，主要应用于地震勘探领域来压缩子波，提高地震资料的纵向分辨率的(Pulse deconvolution, mainly used in the field of seismic exploration to compress the wavelet, improve the vertical resolution of seismic data)

this file give another type of generation of quadrature amplitude modulation

详细介绍几种常用光伏最大功率跟踪算法，并对其各自缺点提出改进(Comparison and Improvement of Several MPPT Methods)

lte中上行链路scofdm调制方式的实现过程，包括dft，idft和ofdm过程(lte uplink scofdm modulation implementation process, including the dft, idft and ofdm process)

在MIMO系统下，空时分组码在不同天线下的性能（基于接受信号合并）(STBC performance under different antenna)

光流法运动估计 (The optical flow estimation)

This example solves a 2nd order wave equation: utt = uxx + uyy, with u = 0 on the boundaries. It uses a 2nd order central finite difference in time and a Chebyshev spectral method in space (using FFT). It compares to running the same algorithm on the GPU using gpu-arrays and built-in functions available for the GPU.

使用误差累计的方式，来实时的更新背景，提取出最新的背景，(Cumulative manner using the error to the background of real-time update, extract the latest background)

Gaussian differential.