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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.)

说明：  matlab经典教材，详细讲述了matlab6.0的功能与使用方法(matlab classic materials, matlab6.0 described in detail the function and use)

8与定向消失moments.pdf双通道滤波器(8On two-channel filter banks with directional vanishing moments.pdf)

基于matlab的k均值算法，程序比较简单，适合初学者学习(Matlab k-means algorithm, the procedure is relatively simple, suitable for beginners to learn)

microprocessor architecture。硬件编程很有用的书(microprocessor architecture. Hardware programming useful book)

is a document hwo help to know about electrical enginering

描述刚体卫星姿态稳定控制的程序。分为三种情况，小推力控制，飞轮控制与小推力飞轮联合控制。能在干扰下稳定卫星的姿态。( The program of attitude stabilization control for rigid satellite. It is divided into three situations: small thrust control, flywheel control and small thrust flywheel combined control. Can stabilize the satellite attitude under jamming. )

EMD 分解程序，官网HHT文件官网HHT文件(EMD decomposing program, official website HHT file official website HHT file)

说明：  仿真方法：1．在Matlab命令窗口中输入：TargetTracke(0,0)；进行跟踪实验仿真； 2．为了体现本文的重点，即模型切换的重要性，在Matlab命令窗口中输入：argetTracke(0,1)；可以观看如果不采用模型切换的仿真结果；3．在Matlab命令窗口中输入：Mentecarlo；进蒙特卡洛仿真； (kalman filter simulate)

说明：  simulink实现8PSK调制解调技术实现的研究(simulink 8PSK modulation and demodulation technology research)