gps-satellite-position-calculation-

this file include exm8*1 of Padyar book,and is about PSS,GEP...

基于OFDM/OQAM 的IOTA原型滤波器设计(IOTA prototype filter design based on OFDM/OQAM)

说明：  专家场做图像的去噪和修复，老外写的，很不错。(Experts to do field image denoising and restoration, written by a foreigner, is pretty good.)

进行边界轮廓标定的snake算法工具箱，距离势能 gvf 以及传统sanke等各种snake(The boundary contour of the snake algorithm calibration kit, from the potential gvf and other traditional snake sanke)

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.)

GPS网平差C++程序，包含粗差探测、拟稳平差、已知点加权平差、自由网平差等各种算例(GPS network adjustment C++ procedures, including gross error detection, to be stable adjustment, known point weighting adjustment, free network adjustment, and other examples)

PID是控制中最为常用的算法，本程序包提供了PID参数设计模型，同时也提供了相应的具体实例。(PID is the most popular algorithm in control system, this package provides the modelling for PID parameter optimizing and the examples are presented as well.)

说明：  6. 在三条径的瑞利信道中，对于OFDM： (1) 请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真。画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已同步，请设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已同步，请设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(6. In the three-path Rayleigh channel, for OFDM: (1) please design a specific navigation-assisted channel estimation method and use Simulink for simulation.The relation curves of bit signal-noise ratio and channel estimation mean square error and the relation curves of bit signal-noise ratio and bit error rate are drawn. (2) if the frequency has been synchronized, please design a specific method of time synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit-snr and acquisition probability. (3) if time has been synchronized, please design a specific method of frequency synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit signal-to-noise ratio and frequency synchronization error.)

说明：  蝙蝠算法的简单实现，基于matlab的蝙蝠算法(Simple implementation of bat algorithm, bat algorithm based on matlab)

PSIM仿真1字型三电平中点箝位并网光伏逆变器，采用SPWM调制 (The the PSIM simulation 1 font tri-level neutral point clamped grid PV inverter SPWM modulation)