delay_estimator_1

DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 (DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.)

说明：  利用提升的二代小波，对图像进行去噪处理，通过不同的去噪过程比较，显示优势(Used to enhance the second generation wavelet, the image denoising, denoising process through different comparison shows advantages)

MATLAB中colorbar的设置 源程序代码(MATLAB colorbar setup source code)

一组取值为+/-1的随机序列，每两个数据之间插入3个0，然后将序列通过一个设计好的根升余弦滤波器，并用周期图法和Welch法分别绘制信号的功率谱。再次通过根升余弦滤波器后用stem函数绘图。(A set of values ​ ​ is+ /-1 random sequence inserted between every two data 3 0, then the sequence through a root raised cosine filter designed, periodogram and Welch method to draw the signal powerspectrum. Stem function by root raised cosine filter with drawing again.)

PSO算法对PID控制器参数进行设置使得系统的ITAE性能指标最小(PSO algorithm PID controller parameters set so that the minimum system performance index ITAE)

hyper chaotic transformation

基于Matlab平台将LDPC码与64QAM结合进行仿真，得出误码率曲线图。(LDPC codes based on Matlab platform will combine with 64QAM simulation results BER curve.)

说明：  MATLAB绘制各种特殊图型的程序，具有很强的参考价值。(MATLAB draw a variety of special graphics program has a strong reference value.)

Fuzzy C-means Matleb source code

实现对于一个简单函数的matlab求极值粒子群算法。很有实际使用意义(The the extremal particle swarm algorithm for a simple function matlab seek. Very practical significance)