huodaohangxinxi

说明：  采用图像序列帧差法，用于运动目标检测，提取出运动目标(For moving object detection)

fir算法的MATLAB实现过程。非常完整的实现了FIR算法，运行速度很好(fir algorithm in MATLAB process. Complete FIR algorithm, running speed is good)

OFDM系统的自适应功率和比特分配算法，实现系统资源的自适应分配（2)－原创(adaptive allocation for OFDM system)

说明：  该软件的处理类似于短时傅立叶变换（STFT），但应用了更长、更重叠的分析/合成窗口，使时频处理从根本上对混叠具有鲁棒性。这种差异与非常活跃的时频处理技术有关，例如Dirac或优化的自适应波束形成器。(The software does processing similar to the short-time Fourier transform , but applies the longer and more overlapping analysis/synthesis window to make the time-frequency processing fundamentally robust for aliasing.)

说明：  实现ASK、FSK、PSK数字调制系统的仿真，观察功率谱密度，眼图，对系统的仿真误码率与理论误码率进行比较(Realize the simulation of ASK digital modulation system, observe the power spectral density and eye diagram, and compare the simulation error rate with the theoretical error rate of the system.)

基于MATLAB实现机器视觉中通过单幅图像实现测量长度，面积等(Based on MATLAB, we can measure the length, area and so on through single image in machine vision.)

BM3D完整代码（不是.p文件），可以看到全部代码，供学习参考(BM3D complete code (not the .p file), you can see all the code, for study and reference)

说明：  可以得到两层异构蜂窝网络的覆盖率，以及单层异构蜂窝网络的覆盖率，并将实验结果与理论结果进行对比(The coverage of two-layer heterogeneous cellular network and single-layer heterogeneous cellular network can be obtained. The experimental results are compared with the theoretical results.)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (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。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

OFDM自适应资源分配时，我们知道遗传算法很常见，这里我们给大家编了一下遗传算法的代码，供大家参考(OFDM adaptive resource allocation, we know the genetic algorithm is very common here, we compiled a genetic algorithm code for your reference)