eighth-homework

最速下降法，优化算法的一种，具有二次收敛性，若目标函数为二次正定函数，经有限步可达到极小点(Steepest descent method, an algorithm with quadratic convergence, if the objective function is quadratic positive definite function can be achieved by the finite step minima)

根据频率的不同，设置不同的滤波器，包括低通、高通、带通等(Depending on the frequency set different filters, including low pass, high pass, band pass, etc.)

雷达通信一体化系统，针对非波动目标以及波动目标的雷达探测性能分析。(he dual-frequency MPPSK-MODEM platform is a flexible one. When ranging accuracy request is low or platform is particularly affected by power limitations, the platform would perform both data transmission and range measurement with single frequency modes. In this paper, the ranging resolution of MPPSK pulse waveforms with the match filter and impacting filter processing method are discussed, respectively. Also, the selection of MPPSK modulation parameters for ranging is considered. In particular, requirements that allow for employing such special parameter values for range measurements with high accuracy and high range are investigated. Moreover, high repetition frequency (HRF) bi-phase code MPPSK pulse train base on m sequence are presented, the ranging accuracy of the proposed signal with the match filter processing method is deduced. In addition to theoretical considerations, the paper presents system simulations and measurement results of single-frequency MPPSK intergated systems, d)

dds信号发生器，matlab7.0，dspbuilder7.0(dds signal generator, matlab7.0, dspbuilder7.0)

支付宝接口，c-2005-utf-8.rar(no)

M文件以及simulink产生伪随机码，是M序列，可在扩频通信中应用。(M files and simulink pseudo random code, is the M series, available in the spread spectrum communication applications. )

A color image encryption code which segregated the image components separately. Include "Add Noise" as well !!

MATLAB CODE FOR CHINESE ENGINEERS

stbc for 2 tx and 2 rx

运用传输矩阵法计算一维光子晶体不同周期对带隙的影响(use TTM calculating the effects of N for PBG)