tch

This program plots spectrograms (vertical slices of intensities versus frequencies, with slices plotted against time).

本组设计的声音导引系统使用双MCU结构，采用基于时间差的声源定位算法（利用三路接收器的时差信号）结合PID算法判断并控制移动声源的速度。本设计的特色在于使用四阶Butterworth带通滤波器对声音信号进行处理，使其具有较强抗干扰能力。且系统设计性价比高，功耗低。(Our group design the Sound Guidance System based on Bi-MCU configuration, using time difference sound source orientation arithmetic（the time difference signal from three receivers）combining PID arithmetic to determine and control the mobile sound source’s velocity. The feature of the designation is processing the sound signal by four-order Butterworth band-pass filter. This enhances the anti-jamming ability. Furthermore, the system has the high performance and low price.)

GMSK的调制解调算法，码长为8的信源长度，注释很清楚(modulation and demodulation of GMSK)

这个是对各种信道，如awgn、rayleigh、rice等的一个仿真。简单易懂，意义较大(This is a variety of channels, such as awgn, rayleigh, rice, etc. a simulation. Easy to understand, the larger significance)

说明：  萤火虫算法的matlab示例代码，只适用于求极大值(极小值可转化为求极大值)(Firefly algorithm matlab sample code, only applicable to the maximum (minimum can be converted to the maximum))

这是一个时间序列的高通滤波matlab函数！(This is a time series of high-pass filter function matlab!)

说明：  基于levenberg-marquardt的高斯分解法，并用GLAS信号进行了验证(A Gaussian Decomposition approach based on levenberg-marquardt method. Verified by GLAS waveform signals.)

lam do an chuyen nganh vat va qua di

matlab数学手册 还是可以的 可以看看(Mathematics Handbook or can be)

MATLAB编程经典教程，中文译本，简单易懂(MATLAB programming classic handbook, Chinese translation, easy to understand)