base_band_signal

bluetooth matlab GFSK 调制解调， 误码率统计(bluetooth matlab GFSK modulation & demodulation)

用于混合动力汽车动力性经济性仿真，用simulink创建的模型(For hybrid vehicle dynamic simulation)

一个很实用的数码照片降噪的方法，matlab编的，相信对很多图像处理的人都有帮助(A photo process method for noise reduction, written by matlab.)

Snake算法程序，程序包括操作界面和说明文档(Snake algorithm, program, including the user interface and documentation)

主要研究了两种高动态扩频信号快速捕获的方法,即基于FFT 的频域(载波) 并行捕获法和基于FFT 的时域(伪码) 并行捕获法,并使用MATLAB 进行了仿真和比较。仿真结果表明:基于FFT 的频域并行捕获可捕获较大的频偏并跟踪一定 的频率变化率,可用于卫星变轨等高动态、高加速度等飞行过程。而基于FFT 的时域并行捕获可快速捕获码相位,用于在轨飞行的飞行器,可根据轨道参数提前预报其多普勒频偏,但同时需要精密测距的飞行过程。(Research on the quick acquisition method of the high dynamic spread spectrum signals)

OFDM(正交频率调制)实现多载波调制基本思想是将带宽信道分解成许多并行的窄子信道，是每个子信道的想干带宽，从而实现平稳衰落。搭建了完整的OFDM信道链路系统，运用三种不同的信道估计方法(LS信道估计、DFT信道估计、Improved-DFT信道估计)，并对AWGN理想信道和衰落信道误码情况进行了仿真和比较。(OFDM (Orthogonal Frequency Modulation) multicarrier modulation basic idea bandwidth channel is decomposed into a number of parallel narrow subchannels, each subchannel wanted bandwidth, in order to achieve a smooth fading. Build a complete OFDM channel link system, the use of three kinds of different channel estimated method (LS channel estimated, to the DFT letter Tao estimates, Improved-the DFT letter Road estimated), and AWGN ideal letter Road and fading channel bit error situation conducted a simulation and comparison .)

利用连续两张图片中莫尔条纹实现位移测量，对条纹区域像素灰度值采用正弦函数拟合(Moire fringe displacement measurement in two consecutive pictures, fitting the gray value of pixels in fringe region with sinusoidal function.)

此程序是MPPT的扰动观察法的主程序可为初学者学习提供很好的帮助(this procedure is about MPPT s P&Q, it is helpful for beginner)

MATLAB的主要函数及其注释 可方便查找用(The main function of MATLAB and its notes can be easily used to find)

说明：  标准化降水蒸散发指数 matlab的代码(Standardized index precipitation evaporation for matlab)，直接按照例子中的数据格式运行SPEI_Cal.m文件，运行结果在stacking中查询，可以自己修改时间尺度，亲测可用。(The program calculates a time series of the Standardised Precipitation- Evapotransporation Index (SPEI) at a given time interval from an input data file containing monthly time series of precipitation and mean temperature, plus the geographic coordinates of the observatory.)