WS4WSu60

16QAM的matlab实现，以及计算机仿真，观察其波形，功率谱，误码率以及星座图(16QAM to achieve the matlab, as well as computer simulation, to observe the waveform, power spectrum, BER, and constellation diagram)

mbedded Zerotrees of Wavelet transforms (EZW) is a lossy image compression algorithm. At low bit rates, i.e. high compression ratios, most of the coefficients produced by a subband transform (such as the wavelet transform) will be zero, or very close to zero. This occurs because "real world" images tend to contain mostly low frequency information (highly correlated). The locations where high frequency information does occur (such as edges in the image) this is particularly important in terms of human perception of the image quality, and thus must be represented accurately in any high quality coding scheme.

说明：  自己做的一个关于模糊逻辑的控制器，输入隶属函数为高斯型，输出为三角型(a fuzzy logic controller)

tA scheme of format conversion optical 16-ary quadrature amplitude modulation (16QAM) toquadrature phase shift keying (QPSK) signal based on cascaded four-wave mixing (FWM) in semiconduc-tor optical amplifiers (SOAs) is proposed. Theoretical analysis and simulations of the format conversionscheme are conducted to validate the feasibility of the proposal. In this proposal, the phase conjugatedof 16QAM signal is generated after the first FWM process in an SOA, and then the QPSK signal is con-verted due to the second non-degenerate FWM (ND-FWM) process in another SOA. The performance andthe optimal design of the 10 Gbit/s format conversion system under various key parameters of SOAs are uated and discussed. Simulation results present useful to enable interconnection between backbonenetwork and access network.

实现图像中文字定位功能，特别是新闻图像中的标题字幕的定位，算法简单，效果也不错(Text positioning of image, especially the image of the title locate news captions, the algorithm is simple, with good results)

pll simulink model. noise and system model

这是自己编的光谱分析程序，里面含有实验数据，下载后请不要当做自己的实验数据，可以作为参考，谢谢合作(This is their series spectral analysis program, which contains experimental data, as their own experimental data Do not download, can be used as reference, Thank you for your cooperation)

说明：  一本适Matlab初学者的好书，绝对实用，原版英文教材(A good book for beginners appropriate Matlab, absolutely practical, original English teaching materials)

改进的pso算法（3个m文件和一个说明文件）： 本算法实现Clerc and Kennedy 2002年对pso算法的重要改进-Improved PSO algorithm (Improved PSO algorithm (3 m documents and a note): This algorithm Clerc and Kennedy 2002 years, the importance of improved PSO algorithm )

After identifying the best MNT− 1 nodes with the simplified branch metric and the accumulated branch metric at stage NT − 1, we then calculate the LLR of each coded bit utilizing the standard squared Euclidian distance metric. The log-likelihood ratio (LLR) of a posteriori probability (APP) of each coded bit conditioned on the received signal y is normally calculated using the max-log approximation.