201400525-201400564-P1

Direct Sequence Spread Spectrum

Mat lab code for Amplitude modulation

Space lib tips which is so useful in matlab programing particularlly in Control engineering.

(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 ((1) in certain wireless channel, the Doppler frequency shift will be caused by wireless channel output signal aliasing. Please describe the resulting aliasing of a variety of reasons (2) wireless channel Doppler spectrum there is a classical spectrum (classic spectrum), please explain such a spectral shape of the mechanism (3) Please use Simulink tools for writing code ( S-Function mode), resulting in a single Path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And please answer: prove that they used computer-generated classical spectrum is correct possible ways.)

TSP问题（货郎担问题，旅行商问题）的模拟退火算法通用malab源程序(TSP problem (traveling salesman problem, traveling salesman problem) simulated annealing algorithm malab common source)

是关于matlab的多种知识，对于入门以及深入的一些了解有很大帮助。(On Matlab a variety of knowledge, of great help for entry and in-depth some understanding.)

MATLAB视频教程3帮你轻松入门学习MATLAB编程(MATLAB Video Tutorial 3 Introduction to help you easily learn MATLAB programming)

用混合粒子群算法求解TSP问题，自带GUI界面，共有９中算法，可解决各种TSP问题，效果不错。(Using hybrid particle swarm algorithm to solve TSP problems, bring their own GUI interface, a total of 9 in the algorithm, to resolve the various TSP problems, good results.)

说明：  主要讲述ofdm的原理，非常详细，可供需要者参考！很好(Mainly about the principle of ofdm, very detailed, for those who need it for reference! Well)

Designs a linear phase FIR lowpass filter such that it: - minimizes the filter order - has a constraint on the maximum passband ripple - has a constraint on the maximum stopband attenuation (This is a quasiconvex problem and can be solved using a bisection. minimize filter order n s.t. 1/delta <= H(w) <= delta for w in the passband |H(w)| <= atten_level for w in the stopband where H is the frequency response function and variable is the filter impulse response h (and its order/length). Data is delta (max passband ripple) and atten_level (max stopband attenuation level). )