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空时网格码sttc的MATLAB仿真程序。(Space-time trellis codes sttc the MATLAB simulation program.)

BP神经网络整定的PID算法_matlab源程序(BP neural network tuning PID algorithm _matlab source)

This a matlab code for nested dissection.(This Matlab code for a nested dissection.)

对mag矩阵的行列和进行计算，并显示结果。(The ranks of the mag matrix and to calculate and display the results.)

信号时正弦波加正态零均值白噪声，信噪比10db，信号频率2kHZ，采样频率100kHZ，数据长度N=256。 (1). 用周期图法进行谱估计。(Sine wave signal plus zero-mean normal white noise, SNR 10db, frequency 2kHZ, sampling frequency 100kHZ, data length N = 256. (1) with the periodogram spectral estimation.)

这是计算机插直的matlab算法集锦,全面而有用,对从事数值计算方面的朋友很有帮助!(This is a computer algorithm matlab interpolation straight allehanda, comprehensive and useful aspects of numerical computation involved in helpful friend!)

现需要在高度为600~700KM范围内，回归周期为30天的太阳同步轨道上布置一颗L波段的合成孔径雷达卫星。 1. 请设计合适的轨道参数，并仿真对应轨道下一个运行周期内星下点轨迹图（纬度和经度两个图）； 2. 计算多普勒中心频率，多普勒调频率与纬度的关系图（设姿态角为0°，天线视角20°~60°，推荐35°）； 3. 按高斯投影方式，将星下点轨迹图投影到地图坐标上。(Now requires a height of 600 ~ 700KM range, return period of 30 days are arranged on a sun-synchronous orbit L-band Synthetic Aperture Radar satellites. 1 Please design the appropriate orbital parameters and simulate the corresponding orbit within the next operating cycle nadir trajectories (latitude and longitude two graphs) 2. Calculate the Doppler center frequency, Doppler frequency and the relationship between latitude Figure (set attitude angle is 0, the antenna angle of 20 to 60, recommended 35) 3 Press Gauss projection, the nadir trajectories projected onto the map coordinates.)

说明：  可根据需要一步步生成三变量或者四变量的卡诺图！谢谢！(To make kanuotu!)

粒子群算法的matab程序 可以求解带非线性约束的优化问题(a pso code which can slove optimization problems with nonlinear constraints.)

OFDM的调制过程，已经运行过，比较不错，过程很清晰(OFDM modulation process has been run before, quite good, the process is very clear)