NN_SOUND_DEMO

使用Matlab实现双极性不归零码，画出波形并给出功率谱。(use Matlab bipolar not NRZ, paint and wave power spectrum is given.)

IEEE 802.11ac的发送端代码，用matlab生成，包含发送端的所有模块，至RF前端(IEEE 802.11ac transmitter matlab code)

matlab数值分析详解，新手入门必备，常用matlab技术。(matlab numerical analysis Xiangjie, the Getting Started essential, commonly used matlab technology.)

说明：  matlab源程序的学习案例，方便大家学习，欢迎下载！！(matlab source case study, to facilitate learning, welcome to download! !)

QPSK modulation system with recover loops(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.)

变步长LMS滤波器做系统辨识，有详细注释，课运行(Variable step size LMS filter to do system identification, detailed notes, classes run)

实现了二维结构的拓扑优化设计，并且对程序的每一步进行了详细的解释和说明，对于拓扑优化的初学者来说，很有帮助(The topology optimization design of two-dimensional structure is realized, and every step of the program is explained and explained in detail, which is very helpful for beginners of topology optimization.)

说明：  通信原理方面的一些基础matlab程序,包含数字基带传输系统中升余弦滚降系统,最佳基带系统,基带信号眼图,OOK,2PSK,2FS,MPSk,DSB,SSB,VSB(Some basic matlab programs of communication principle, including up-cosine roll-down system in digital baseband transmission system, optimal baseband system, baseband signal eye diagram, OOK, 2PSK, 2FS, MPSk, DSB, SSB, VSB)

说明：  2005MCMA题程序，本程序是自己编的，如有不足请见谅(2005MCMA that procedure, the procedure was by myself, and if there is insufficient please forgiven)

Retrieve the character data from the second child of the first employee. T.