dea

利用平移不变量发，实现小波阈值去噪，能够有效的消去伪吉布斯现象，利于后续的特征点提取。(The use of translation invariant issued to wavelet threshold denoising can effectively eliminate the Gibbs phenomenon, and conducive to the subsequent feature point extraction.)

自己编写的阵列信号DOA估计算法，包括MUSIC,root-MUSIC，esprit,F-sapes,MVDR.(I have written an array of signal DOA estimation algorithms, including MUSIC, root-MUSIC, esprit, F-sapes, MVDR.)

阵列麦克风中的music算法，用matlab仿真的(Music algorithm in array microphone, matlab simulation)

sample of assembly language for beginners...

There is currently no support for mmap, user-space interrupt management and DMA buffers.

Detection of qpsk signals

audio classification using SVM for 5 classes

采用CIC（级联积分梳状）滤波器实现降采样的功能，并分析了级联级数、差分延时数对CIC滤波器幅频响应的影响；采用Verilog语言实现了CIC滤波及降采样的功能；(Using CIC (Cascaded Integrator Comb) filter down-sampling function, and analyzes cascaded stages, affecting the number of differential delay CIC filter amplitude-frequency response using Verilog language of the CIC filter and down sampling Features )

说明：  双音频按键识别 背景： 打电话拨号时，每次按键会发出不同的声音，这些声音实际上是由一些固定频率的正弦信号合成的。因为每个按键声音包含两个不同频率的正弦信号，因此也被称为“双音频”信号，简记为DTMF。这相当于是对不同键位用‘音频’进行了编码，如同计算机领域中用数字0和1对处理对象（包括键盘）进行编码。(Two-tone buttons identify Background: When you call dial, each key emits different sounds, which is actually made up of some fixed frequency sinusoidal signal synthesis. Because the sound of each key contains two sinusoidal signals of different frequencies, it is also known as &quot two-tone&quot signal, abbreviated as DTMF. This is equivalent to different keys using the ' audio' encoded, as the computer industry with the numbers 0 and 1 pair of processing object (including the keyboard) to be encoded.)

对adc采样信号进行频谱分析，计算信噪比，有效位数等等重要参数(Adc sampling signal for spectrum analysis, calculate SNR, the effective number of bits so the important parameters)