spectral_efficiency

基于Matlab的自适应滤波器的LMS算法(Matlab-based LMS adaptive filter algorithm)

音频信号频谱分析:应用普通录用软件录制声音，对其进行时域和频域分析(audio signal frequency analyse)

自适应滤波算法中的LMS算法，用于语音通信中的噪声抵消。(Adaptive filtering algorithm in the LMS algorithm for voice communications in noise canceling.)

This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. The transmitter?s symbol period is T and set to a value of 100 ms. The symbol period at the receiver is Tr. The model will produce six windows: Two constellation plots and two eye diagrams (for the real part only), at the output of the matched fi lters and after the recovery loops a plot of the phase error (output of the NCO) and a plot of the fractional timing error (used in the interpolator). The frequency off set at the receiver is denoted by deltaf. The model simulates the transmission of 8000 QPSK symbols.

说明：  基于奇异值分解的信号降噪算法，自己编写的程序，程序的理论见压缩文件中的参考文档。(The signal denoising algorithm based on singular value decomposition(SVD), the program written by itself, the theory of the program can be found in the reference document in the compressed file.)

一种变步长的lms算法实现，用MATLAB编写。(A variable step size lms algorithm, using MATLAB write.)

说明：  人脸检测的matlab程序，从网上下载的，希望对大家有用.(face detect matlab)

A simulink model for chaotic Gyrostat system

说明：  机械振动，有限元法求解结构的模态（固有频率，振型）(mechanical vibration)

黄变换的代码，经验模式分解，可用于信号分解(Huang transform the code, empirical mode decomposition can be used for signal decomposition)