FDTD_reflection

Speech Recognition - Numbers 1 to 5 Energy normalization and time alignment References: [1] L. Rabiner and B.H. Juang,Fundamentals of Speech Recognition, Prentice-Hall, 1993. ％ [2] P.E. Papamichalis, Practical Approaches to Speech Coding, Prentice-Hall, 1987. ％ [3] J.D. Markel and A.H. Gray,Linear Prediction of Speech(Speech Recognition-Numbers 1 to 5 Energy n ormalization and time alignment References : [1] L. Paras and B. H. Juang, Fundamentals of Speech Recognition. Prentice-Hall, 1993. % [2] P. E. Papamichalis, Practical Approaches to Speech Coding, Prentice-Hall, 1987. % [3] J. D. Markel and A. H. Gray, Linear Prediction of Speech)

Calculate the least squares approximation method.

程序生成的随机数,真正的名字叫做“伪随机数”,需要有一个种子来初始化 使用当前时间去初始化种子,就能得到不同的伪随机数序列(Program generates random numbers, the real name is " pseudo-random number," the need for a seed to initialize the current time to initialize the seed, you can get different pseudo-random number sequence)

在Matlab下用Simulink进行通信仿真，模拟线性调制，扰码与解扰，低通信号的抽样定理设计 (In Matlab using Simulink for communication simulation, simulation of linear modulation, scrambling and descrambling, low-signal design of the sampling theorem)

SOM training algorithm

对线性调频信号用dft方法分频后进行窄带波束形成后拼接，为宽带波束形成方法(After dividing the frequency of LFM signal by DFT method, narrow-band beamforming and splicing are used as the broadband beamforming method.)

码分多址(CDMA)技术作为第三代移动通信系统的核心技术，具有容量大、抗干扰能力强等优点。然而,传统的CDMA系统属于窄带扩频系统,它的数据速率比较低,不能胜任新一代移动通信系统 （beyond 3G）高速数据通信的需要。而多载波传输技术－正交频分复用（OFDM），作为后三代移动通信的核心技术，则具有高数据速率传输的特点。(Code Division Multiple Access (CDMA) technology as the third generation mobile communication system' s core technology, high capacity, anti-interference ability and so on. However, the traditional narrow-band CDMA system is spread spectrum system, and its relatively low data rate, can not do next-generation mobile communication systems (beyond 3G) high speed data communication needs. The multi-carrier transmission technology- orthogonal frequency division multiplexing (OFDM), after three generations of mobile communications as a core technology, the high data rate transmission characteristics.)

说明：  简单的产生PAM调制序列的M文件，可生成txt文件存储数据(Simple produce PAM modulation sequence of M files, it can create a TXT files stored data )

独立分量分析中的selcol代码 matlab格式 希望有用 (independent component analysis of Matlab code selcol hope useful format)

4QAM、16QAM、32QAM、64QAM、128QAM、256QAM星座图映射，map、频偏估计算法(4QAM, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM constellation mapping, map, frequency offset estimation algorithm)