OFDM_DT10K50

Data Encryption by Matrix Multiplication We will only use numbers 0 to 26 for the encryptive mathematics operation. Numbers from 1 to 26 are for letters from A to Z and 0 is for all non-letter characters. To minimize usage of numbers, all letters are converted to upper case. The original message is converted to number array according to the ASCII table and minus 64. We partition whole array into blocks of 8 numbers. The last block may be added several zeros. Then multiply each block by the an 8x8 matrix A which is invertible in Z27 to get cipher data. The decryption is the same process except to use its inverse matrix B. For good visual reading, we convert all non-letter characters to under score for the decryption.

SIMULINK仿真实现BPSK在莱斯衰落+AWGN信道中的调制与解调，并分析了误码率和星座图等等参数。(SIMULINK simulation of BPSK in Rician Fading realize+ AWGN channel modulation and demodulation, and analyzes the bit error rate and constellation parameters and so on.)

大气标准转换，适应于各类航空航天器飞行高度对应的状态查询(for caculator the variavles of air)

3 dimensin grafik simulator

matlab simulink Dstatcom distribution fact device

采用非线性动态逆与全程滑模变结构控制相结合的思路，建立了一类具有不确定性和外界干扰的仿射非线性系统的强鲁棒性控制策略。(A robust controller design combining the dynamic inversion method and global sliding-mode variable structure control for a class of uncertain affine nonlinear systems is considered.)

说明：  图像置乱中的仿射变换，优点是加密和解密的不需要周期迭代，图像置乱效果好(it is good for image scrambling becaus of low compute complexity)

OFDM系统的基础代码集。都是基础程序，希望对大家有用(OFDM system code base set. Are based procedures in the hope that it may be useful to)

基于梯度下降法的SVM的实现。适合初学者(Gradient descent method to achieve SVM. Suitable for the news.)

包括压缩比、运行时间和计算复原图像的峰值信噪比,ML法能够很好的估计信号的信噪比,窗函数法设计一个数字带通FIR滤波器。( Including compression ratio, image restoration computing uptime and peak signal to noise ratio, ML estimation method can be a good signal to noise ratio, A window function design FIR digital band-pass filter.)