machineLearning

Bit Error rate Simulation

Stop-and-wait ARQ is a method used in telecommunications to send information between two connected devices. It ensures that information is not lost due to dropped packets and that packets are received in the correct order. It is the simplest kind of automatic repeat-request (ARQ) method. A stop-and-wait ARQ sender sends one frame at a time it is a special case of the general sliding window protocol with both transmit and receive window sizes equal to 1. After sending each frame, the sender doesn t send any further frames until it receives an acknowledgement (ACK) signal. After receiving a good frame, the receiver sends an ACK. If the ACK does not reach the sender before a certain time, known as the timeout, the sender sends the same frame again.

实现一个阻性负载 sys(1)为负载电流；sys(2)为输出电压(achieve a resistive load sys (1) of load current; Sys (2) of the output voltage)

用wolf法计算最大lyapunov指数(The maximum lyapunov index calculation method by wolf)

分形编码的解码程序，用matlab编写。适合初学者模仿(Maple Leaf iterative produce, prepared with matlab. Suitable for beginners to imitate)

利用Matlab做的各种波束形成的界面程序(Interface program to use Matlab to do a variety of beamforming)

已知空间里面的的的三个空间点来计算计算三角形外接圆(Three calculation known triangle circumcircle)

WSN 三维定位的一个论文 讲的非常详细 可以对传感器网络发展和未来有一个了解(WSN three-dimensional positioning of a paper in a very detailed and the future development of sensor networks have a)

摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情 况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系 统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保 护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。 (O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re given and comp ared.The conclusion is sa tisfac to ry. )

TURBO均衡算法，完整的通信系统，可直接仿真，信源编码调制瑞利水落信道，然后接收端进行解码均衡，最后绘出误码率曲线图(TURBO equalization algorithm, a complete communication system, direct simulation, the source code modulation Mizuochi Rayleigh channel, then the receiver decodes the equalizer, and finally the bit error rate plotted graph)