chap01_12

ASK communication model

toolbox 4 的说明文件,对新手可能有用 。(toolbox 4 describe)

四杆机构运动求解，可运算关节角度，角加速度等(four-bar mechanism)

说明：  BSIM3v34 Basic Characterization Codes for MOSFETs

matlab file to draw ellipse

determinant andeigen values

QPSK信号生成 matlab编写的程序 并且分为i路 与q路进行(QPSK signal)

语音处理说话人识别 人工智能 ，实现基于VQ和GMM的说话人识别系统，通过增减训练数据或调整系统参数，对比分析一下基于VQ和GMM的说话人识别系统性能差别。(Speech processing speaker recognition, artificial intelligence realization of speaker recognition system based on VQ and GMM, through the training data increase or decrease or adjust the system parameters, the contrast analysis on the basis of VQ and GMM speaker recognition system performance difference.)

扩频通信系统仿真 ——系统将基带信号（即信息）的频谱扩展至很宽的频带上，然后再进行传输，即将欲传输的信息数据用伪随机序列编码调制，实现频谱扩展，然后通过信道编码发送出去；接收端采用与发送端完全相同的伪随机序列作为本地解扩信号进行相关处理，以恢复信息，最后进行解调，完成整个系统的接收。(Simulation of spread spectrum communication system- the system baseband signal (ie, information) be extended to a wide spectrum of frequency bands, and then transferred, will want to use transmitted information data sequence of pseudo-random code modulation, to achieve expansion of the spectrum, and then sent channel coding receiver and transmitter use the same pseudo-random sequence as related to the local despreading signal processing, in order to restore the information, the final demodulation, the receiver to complete the system.)

In this project, we have designed and implemented a method to estimate the dual frequencies in sinusoids immersed in additive white Gaussian noise. The Cramér-Rao lower bound (CRLB) for the signal model and a nonlinear least square frequency estimator are derived. The estimator is evaluated by numerical examples.