net37

Communication related programs are really important to understand the working of the systems.

matlab课本程序(matlab program textbooks)

说明：  ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步 骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法 具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法 具有很好的不可听性。(In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show this algorithm can get a good audio effect with various types of audio.)

simulation of IPMSM motor nonlinear control using sliding mode with application of matlab code programs

Modulation test for OFDM : This is a set of five (5) codes about COFDM (Coded Orthogonal Frequency Division Multiplexing) and coding schemes such as Convolutional, BCH, Reed Solomon (RS) and Low Density Parity Check (LDPC). The study uses an OFDM signal over an AWGN Channel with white Gaussian noise model, and calculate the Bit Error Rate wich is plotted.

蒙特卡洛实验，得出曲线为检测性能曲线，为取不同信噪比下的PD与SNR的关系。(The Monte Carlo experiment shows that the curve is the detection performance curve, and the relationship between PD and SNR at different SNR is obtained.)

使用matlab实现rz码的编码,通信原理实验之一(use Matlab achieve rz codes, one communication principle experiment)

改进的量子遗传算法，求解最值问题，绝对没有密码(The improved quantum genetic algorithm to solve the most value problem There is absolutely no password)

改程序包含了二连杆动力学模型以及针对该模型的模糊控制，同时还有对曲线的绘制(Reform program includes a two-link dynamic model and fuzzy control for the model, as well as drawing on the curve)

说明：  本压缩包包含ASK,FSK,PSK,CDMA调制方式的实现，均为simulink。 另外有chirp调制，以及几种方式误码率的比较。(This folder contains ASK, FSK, PSK, CDMA modulation implemented by Simulink. Besides,there is also chirp modulation, and comparison on the error rate.)